./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/mult-dist.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/mult-dist.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8 --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 c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 --- 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-2329fc7 [2022-12-13 12:13:15,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:13:15,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:13:15,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:13:15,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:13:15,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:13:15,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:13:15,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:13:15,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:13:15,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:13:15,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:13:15,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:13:15,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:13:15,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:13:15,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:13:15,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:13:15,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:13:15,124 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:13:15,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:13:15,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:13:15,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:13:15,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:13:15,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:13:15,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:13:15,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:13:15,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:13:15,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:13:15,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:13:15,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:13:15,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:13:15,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:13:15,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:13:15,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:13:15,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:13:15,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:13:15,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:13:15,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:13:15,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:13:15,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:13:15,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:13:15,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:13:15,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 12:13:15,164 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:13:15,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:13:15,165 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:13:15,165 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:13:15,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:13:15,166 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:13:15,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:13:15,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:13:15,167 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:13:15,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:13:15,167 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:13:15,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:13:15,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:13:15,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:13:15,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 12:13:15,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:13:15,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 12:13:15,168 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:13:15,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 12:13:15,169 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:13:15,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 12:13:15,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:13:15,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:13:15,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:13:15,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:13:15,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:13:15,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:13:15,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 12:13:15,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:13:15,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:13:15,171 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:13:15,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 12:13:15,171 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:13:15,171 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:13:15,171 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:13:15,172 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c22a326532494b0b5126a81d8882f3e958ed0a5a46e6da0f77df1a4da18ba846 [2022-12-13 12:13:15,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:13:15,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:13:15,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:13:15,381 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:13:15,382 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:13:15,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-12-13 12:13:18,013 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:13:18,143 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:13:18,144 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/sv-benchmarks/c/weaver/mult-dist.wvr.c [2022-12-13 12:13:18,148 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/data/57adb1d01/872920dcecf142f2afad9d473662ad19/FLAGd1059aac6 [2022-12-13 12:13:18,161 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/data/57adb1d01/872920dcecf142f2afad9d473662ad19 [2022-12-13 12:13:18,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:13:18,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:13:18,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:13:18,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:13:18,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:13:18,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:13:18" (1/1) ... [2022-12-13 12:13:18,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7059f3d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:13:18, skipping insertion in model container [2022-12-13 12:13:18,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:13:18" (1/1) ... [2022-12-13 12:13:18,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:13:18,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:13:18,321 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/sv-benchmarks/c/weaver/mult-dist.wvr.c[2116,2129] [2022-12-13 12:13:18,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:13:18,333 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:13:18,348 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/sv-benchmarks/c/weaver/mult-dist.wvr.c[2116,2129] [2022-12-13 12:13:18,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:13:18,361 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:13:18,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:13:18 WrapperNode [2022-12-13 12:13:18,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:13:18,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:13:18,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:13:18,362 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:13:18,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:13:18" (1/1) ... [2022-12-13 12:13:18,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:13:18" (1/1) ... [2022-12-13 12:13:18,389 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-12-13 12:13:18,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:13:18,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:13:18,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:13:18,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:13:18,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:13:18" (1/1) ... [2022-12-13 12:13:18,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:13:18" (1/1) ... [2022-12-13 12:13:18,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:13:18" (1/1) ... [2022-12-13 12:13:18,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:13:18" (1/1) ... [2022-12-13 12:13:18,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:13:18" (1/1) ... [2022-12-13 12:13:18,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:13:18" (1/1) ... [2022-12-13 12:13:18,405 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:13:18" (1/1) ... [2022-12-13 12:13:18,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:13:18" (1/1) ... [2022-12-13 12:13:18,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:13:18,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:13:18,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:13:18,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:13:18,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:13:18" (1/1) ... [2022-12-13 12:13:18,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:13:18,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:13:18,434 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:13:18,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:13:18,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:13:18,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 12:13:18,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 12:13:18,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 12:13:18,468 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 12:13:18,468 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 12:13:18,468 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 12:13:18,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:13:18,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:13:18,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 12:13:18,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:13:18,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:13:18,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 12:13:18,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:13:18,470 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 12:13:18,547 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:13:18,548 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:13:18,709 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:13:18,716 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:13:18,716 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 12:13:18,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:13:18 BoogieIcfgContainer [2022-12-13 12:13:18,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:13:18,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:13:18,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:13:18,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:13:18,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:13:18" (1/3) ... [2022-12-13 12:13:18,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3444cfc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:13:18, skipping insertion in model container [2022-12-13 12:13:18,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:13:18" (2/3) ... [2022-12-13 12:13:18,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3444cfc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:13:18, skipping insertion in model container [2022-12-13 12:13:18,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:13:18" (3/3) ... [2022-12-13 12:13:18,724 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2022-12-13 12:13:18,731 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 12:13:18,739 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:13:18,740 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 12:13:18,740 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 12:13:18,817 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 12:13:18,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 238 flow [2022-12-13 12:13:18,910 INFO L130 PetriNetUnfolder]: 7/104 cut-off events. [2022-12-13 12:13:18,910 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 12:13:18,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 104 events. 7/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2022-12-13 12:13:18,914 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 107 transitions, 238 flow [2022-12-13 12:13:18,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 93 transitions, 204 flow [2022-12-13 12:13:18,923 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 12:13:18,931 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 93 transitions, 204 flow [2022-12-13 12:13:18,933 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 93 transitions, 204 flow [2022-12-13 12:13:18,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 93 transitions, 204 flow [2022-12-13 12:13:18,954 INFO L130 PetriNetUnfolder]: 7/93 cut-off events. [2022-12-13 12:13:18,954 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 12:13:18,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 93 events. 7/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2022-12-13 12:13:18,956 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2022-12-13 12:13:20,949 INFO L134 LiptonReduction]: Checked pairs total: 1314 [2022-12-13 12:13:20,950 INFO L136 LiptonReduction]: Total number of compositions: 77 [2022-12-13 12:13:20,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:13:20,966 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;@3d6f9592, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:13:20,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 12:13:20,974 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2022-12-13 12:13:20,974 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 12:13:20,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:13:20,975 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:13:20,975 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)] === [2022-12-13 12:13:20,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:13:20,979 INFO L85 PathProgramCache]: Analyzing trace with hash -26822285, now seen corresponding path program 1 times [2022-12-13 12:13:20,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:13:20,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238769831] [2022-12-13 12:13:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:13:20,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:13:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:13:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:21,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:13:21,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238769831] [2022-12-13 12:13:21,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238769831] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:13:21,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:13:21,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 12:13:21,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300587955] [2022-12-13 12:13:21,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:13:21,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:13:21,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:13:21,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:13:21,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:13:21,505 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 184 [2022-12-13 12:13:21,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:21,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:13:21,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 184 [2022-12-13 12:13:21,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:13:21,611 INFO L130 PetriNetUnfolder]: 359/506 cut-off events. [2022-12-13 12:13:21,611 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-12-13 12:13:21,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 506 events. 359/506 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1610 event pairs, 39 based on Foata normal form. 1/307 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2022-12-13 12:13:21,615 INFO L137 encePairwiseOnDemand]: 179/184 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2022-12-13 12:13:21,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 179 flow [2022-12-13 12:13:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:13:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 12:13:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2022-12-13 12:13:21,626 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5706521739130435 [2022-12-13 12:13:21,626 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2022-12-13 12:13:21,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2022-12-13 12:13:21,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:13:21,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2022-12-13 12:13:21,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:21,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:21,637 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:21,638 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 3 states and 315 transitions. [2022-12-13 12:13:21,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 179 flow [2022-12-13 12:13:21,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 12:13:21,643 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 76 flow [2022-12-13 12:13:21,644 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2022-12-13 12:13:21,647 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2022-12-13 12:13:21,648 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 76 flow [2022-12-13 12:13:21,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:21,648 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:13:21,648 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:13:21,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 12:13:21,648 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)] === [2022-12-13 12:13:21,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:13:21,649 INFO L85 PathProgramCache]: Analyzing trace with hash 653405819, now seen corresponding path program 1 times [2022-12-13 12:13:21,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:13:21,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061296414] [2022-12-13 12:13:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:13:21,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:13:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:13:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:21,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:13:21,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061296414] [2022-12-13 12:13:21,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061296414] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:13:21,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:13:21,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 12:13:21,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207818999] [2022-12-13 12:13:21,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:13:21,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:13:21,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:13:21,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:13:21,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:13:21,923 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 184 [2022-12-13 12:13:21,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:21,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:13:21,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 184 [2022-12-13 12:13:21,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:13:22,232 INFO L130 PetriNetUnfolder]: 596/906 cut-off events. [2022-12-13 12:13:22,233 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2022-12-13 12:13:22,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 906 events. 596/906 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3393 event pairs, 166 based on Foata normal form. 6/912 useless extension candidates. Maximal degree in co-relation 627. Up to 420 conditions per place. [2022-12-13 12:13:22,239 INFO L137 encePairwiseOnDemand]: 176/184 looper letters, 69 selfloop transitions, 8 changer transitions 8/85 dead transitions. [2022-12-13 12:13:22,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 85 transitions, 416 flow [2022-12-13 12:13:22,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:13:22,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:13:22,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 652 transitions. [2022-12-13 12:13:22,243 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5062111801242236 [2022-12-13 12:13:22,243 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 652 transitions. [2022-12-13 12:13:22,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 652 transitions. [2022-12-13 12:13:22,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:13:22,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 652 transitions. [2022-12-13 12:13:22,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.14285714285714) internal successors, (652), 7 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:22,250 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) [2022-12-13 12:13:22,251 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) [2022-12-13 12:13:22,251 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 76 flow. Second operand 7 states and 652 transitions. [2022-12-13 12:13:22,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 85 transitions, 416 flow [2022-12-13 12:13:22,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 85 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 12:13:22,253 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 139 flow [2022-12-13 12:13:22,254 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2022-12-13 12:13:22,254 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2022-12-13 12:13:22,254 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 139 flow [2022-12-13 12:13:22,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:22,255 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:13:22,255 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:13:22,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 12:13:22,256 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)] === [2022-12-13 12:13:22,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:13:22,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2070325537, now seen corresponding path program 2 times [2022-12-13 12:13:22,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:13:22,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063194443] [2022-12-13 12:13:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:13:22,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:13:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:13:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:22,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:13:22,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063194443] [2022-12-13 12:13:22,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063194443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:13:22,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457893309] [2022-12-13 12:13:22,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:13:22,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:13:22,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:13:22,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:13:22,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 12:13:22,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:13:22,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:13:22,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 12:13:22,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:13:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:22,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:13:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:23,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457893309] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:13:23,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:13:23,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 16 [2022-12-13 12:13:23,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261550282] [2022-12-13 12:13:23,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:13:23,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:13:23,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:13:23,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:13:23,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-12-13 12:13:23,102 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 184 [2022-12-13 12:13:23,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 139 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:23,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:13:23,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 184 [2022-12-13 12:13:23,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:13:23,493 INFO L130 PetriNetUnfolder]: 832/1268 cut-off events. [2022-12-13 12:13:23,493 INFO L131 PetriNetUnfolder]: For 1490/1545 co-relation queries the response was YES. [2022-12-13 12:13:23,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4023 conditions, 1268 events. 832/1268 cut-off events. For 1490/1545 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5301 event pairs, 172 based on Foata normal form. 6/1272 useless extension candidates. Maximal degree in co-relation 1710. Up to 409 conditions per place. [2022-12-13 12:13:23,500 INFO L137 encePairwiseOnDemand]: 177/184 looper letters, 99 selfloop transitions, 17 changer transitions 1/118 dead transitions. [2022-12-13 12:13:23,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 118 transitions, 705 flow [2022-12-13 12:13:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:13:23,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:13:23,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 777 transitions. [2022-12-13 12:13:23,502 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5278532608695652 [2022-12-13 12:13:23,503 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 777 transitions. [2022-12-13 12:13:23,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 777 transitions. [2022-12-13 12:13:23,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:13:23,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 777 transitions. [2022-12-13 12:13:23,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.125) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:23,506 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) [2022-12-13 12:13:23,507 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) [2022-12-13 12:13:23,507 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 139 flow. Second operand 8 states and 777 transitions. [2022-12-13 12:13:23,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 118 transitions, 705 flow [2022-12-13 12:13:23,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 118 transitions, 675 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-12-13 12:13:23,511 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 294 flow [2022-12-13 12:13:23,511 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=294, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2022-12-13 12:13:23,511 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2022-12-13 12:13:23,512 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 294 flow [2022-12-13 12:13:23,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:23,512 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:13:23,512 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:13:23,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 12:13:23,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:13:23,714 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)] === [2022-12-13 12:13:23,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:13:23,715 INFO L85 PathProgramCache]: Analyzing trace with hash -911645777, now seen corresponding path program 1 times [2022-12-13 12:13:23,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:13:23,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682122310] [2022-12-13 12:13:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:13:23,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:13:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:13:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:23,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:13:23,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682122310] [2022-12-13 12:13:23,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682122310] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:13:23,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:13:23,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 12:13:23,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857429844] [2022-12-13 12:13:23,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:13:23,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:13:23,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:13:23,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:13:23,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:13:23,999 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2022-12-13 12:13:23,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 294 flow. Second operand has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:23,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:13:23,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2022-12-13 12:13:24,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:13:24,377 INFO L130 PetriNetUnfolder]: 1078/1660 cut-off events. [2022-12-13 12:13:24,377 INFO L131 PetriNetUnfolder]: For 4587/4587 co-relation queries the response was YES. [2022-12-13 12:13:24,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6335 conditions, 1660 events. 1078/1660 cut-off events. For 4587/4587 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7414 event pairs, 334 based on Foata normal form. 10/1670 useless extension candidates. Maximal degree in co-relation 4790. Up to 894 conditions per place. [2022-12-13 12:13:24,385 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 99 selfloop transitions, 13 changer transitions 13/125 dead transitions. [2022-12-13 12:13:24,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 125 transitions, 940 flow [2022-12-13 12:13:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:13:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:13:24,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 652 transitions. [2022-12-13 12:13:24,387 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5062111801242236 [2022-12-13 12:13:24,387 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 652 transitions. [2022-12-13 12:13:24,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 652 transitions. [2022-12-13 12:13:24,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:13:24,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 652 transitions. [2022-12-13 12:13:24,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.14285714285714) internal successors, (652), 7 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:24,391 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) [2022-12-13 12:13:24,391 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) [2022-12-13 12:13:24,391 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 294 flow. Second operand 7 states and 652 transitions. [2022-12-13 12:13:24,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 125 transitions, 940 flow [2022-12-13 12:13:24,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 125 transitions, 936 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-12-13 12:13:24,402 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 426 flow [2022-12-13 12:13:24,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2022-12-13 12:13:24,402 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2022-12-13 12:13:24,403 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 426 flow [2022-12-13 12:13:24,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:24,403 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:13:24,403 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:13:24,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 12:13:24,403 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)] === [2022-12-13 12:13:24,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:13:24,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1992628020, now seen corresponding path program 1 times [2022-12-13 12:13:24,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:13:24,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854634183] [2022-12-13 12:13:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:13:24,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:13:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:13:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:24,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:13:24,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854634183] [2022-12-13 12:13:24,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854634183] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:13:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789007710] [2022-12-13 12:13:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:13:24,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:13:24,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:13:24,550 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:13:24,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 12:13:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:13:24,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:13:24,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:13:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:24,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:13:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:24,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789007710] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:13:24,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:13:24,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2022-12-13 12:13:24,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206269010] [2022-12-13 12:13:24,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:13:24,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:13:24,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:13:24,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:13:24,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-12-13 12:13:24,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 184 [2022-12-13 12:13:24,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 426 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:24,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:13:24,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 184 [2022-12-13 12:13:24,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:13:25,290 INFO L130 PetriNetUnfolder]: 1209/1826 cut-off events. [2022-12-13 12:13:25,290 INFO L131 PetriNetUnfolder]: For 7675/7819 co-relation queries the response was YES. [2022-12-13 12:13:25,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8072 conditions, 1826 events. 1209/1826 cut-off events. For 7675/7819 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8249 event pairs, 293 based on Foata normal form. 141/1933 useless extension candidates. Maximal degree in co-relation 5506. Up to 635 conditions per place. [2022-12-13 12:13:25,299 INFO L137 encePairwiseOnDemand]: 177/184 looper letters, 107 selfloop transitions, 21 changer transitions 1/132 dead transitions. [2022-12-13 12:13:25,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 132 transitions, 1070 flow [2022-12-13 12:13:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:13:25,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:13:25,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 775 transitions. [2022-12-13 12:13:25,301 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5264945652173914 [2022-12-13 12:13:25,301 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 775 transitions. [2022-12-13 12:13:25,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 775 transitions. [2022-12-13 12:13:25,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:13:25,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 775 transitions. [2022-12-13 12:13:25,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.875) internal successors, (775), 8 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:25,304 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) [2022-12-13 12:13:25,304 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) [2022-12-13 12:13:25,304 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 426 flow. Second operand 8 states and 775 transitions. [2022-12-13 12:13:25,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 132 transitions, 1070 flow [2022-12-13 12:13:25,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 132 transitions, 1036 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-12-13 12:13:25,313 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 567 flow [2022-12-13 12:13:25,313 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=567, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2022-12-13 12:13:25,314 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 37 predicate places. [2022-12-13 12:13:25,314 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 567 flow [2022-12-13 12:13:25,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:25,314 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:13:25,314 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:13:25,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 12:13:25,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:13:25,516 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)] === [2022-12-13 12:13:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:13:25,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1558431246, now seen corresponding path program 2 times [2022-12-13 12:13:25,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:13:25,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227487757] [2022-12-13 12:13:25,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:13:25,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:13:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:13:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:25,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:13:25,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227487757] [2022-12-13 12:13:25,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227487757] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:13:25,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:13:25,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 12:13:25,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839700308] [2022-12-13 12:13:25,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:13:25,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:13:25,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:13:25,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:13:25,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:13:25,819 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2022-12-13 12:13:25,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 567 flow. Second operand has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:25,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:13:25,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2022-12-13 12:13:25,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:13:26,368 INFO L130 PetriNetUnfolder]: 1526/2384 cut-off events. [2022-12-13 12:13:26,368 INFO L131 PetriNetUnfolder]: For 14073/14073 co-relation queries the response was YES. [2022-12-13 12:13:26,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11297 conditions, 2384 events. 1526/2384 cut-off events. For 14073/14073 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 11666 event pairs, 436 based on Foata normal form. 34/2418 useless extension candidates. Maximal degree in co-relation 7867. Up to 1118 conditions per place. [2022-12-13 12:13:26,380 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 137 selfloop transitions, 28 changer transitions 17/182 dead transitions. [2022-12-13 12:13:26,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 182 transitions, 1723 flow [2022-12-13 12:13:26,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:13:26,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:13:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 930 transitions. [2022-12-13 12:13:26,383 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5054347826086957 [2022-12-13 12:13:26,383 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 930 transitions. [2022-12-13 12:13:26,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 930 transitions. [2022-12-13 12:13:26,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:13:26,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 930 transitions. [2022-12-13 12:13:26,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 93.0) internal successors, (930), 10 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:26,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:26,387 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:26,387 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 567 flow. Second operand 10 states and 930 transitions. [2022-12-13 12:13:26,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 182 transitions, 1723 flow [2022-12-13 12:13:26,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 182 transitions, 1659 flow, removed 23 selfloop flow, removed 1 redundant places. [2022-12-13 12:13:26,404 INFO L231 Difference]: Finished difference. Result has 80 places, 81 transitions, 856 flow [2022-12-13 12:13:26,405 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=856, PETRI_PLACES=80, PETRI_TRANSITIONS=81} [2022-12-13 12:13:26,405 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 51 predicate places. [2022-12-13 12:13:26,405 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 81 transitions, 856 flow [2022-12-13 12:13:26,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:26,405 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:13:26,406 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:13:26,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 12:13:26,406 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)] === [2022-12-13 12:13:26,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:13:26,406 INFO L85 PathProgramCache]: Analyzing trace with hash 2080985373, now seen corresponding path program 3 times [2022-12-13 12:13:26,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:13:26,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655543959] [2022-12-13 12:13:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:13:26,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:13:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:13:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:26,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:13:26,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655543959] [2022-12-13 12:13:26,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655543959] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:13:26,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919677576] [2022-12-13 12:13:26,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:13:26,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:13:26,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:13:26,529 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:13:26,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 12:13:26,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 12:13:26,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:13:26,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:13:26,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:13:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:26,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:13:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:13:31,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919677576] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:13:31,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:13:31,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2022-12-13 12:13:31,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942606191] [2022-12-13 12:13:31,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:13:31,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 12:13:31,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:13:31,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 12:13:31,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=170, Unknown=2, NotChecked=0, Total=240 [2022-12-13 12:13:33,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:13:35,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:13:35,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 184 [2022-12-13 12:13:35,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 81 transitions, 856 flow. Second operand has 16 states, 16 states have (on average 80.1875) internal successors, (1283), 16 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:13:35,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:13:35,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 184 [2022-12-13 12:13:35,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:14:04,547 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 12:14:06,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:14:08,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:14:10,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:14:12,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:14:14,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:14:16,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:14:18,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:14:20,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:14:22,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:14:27,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:14:29,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:14:31,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:14:33,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:14:35,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:14:37,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:14:39,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:15:10,569 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (.cse2 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) (.cse3 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 0) (< 1 .cse0) (let ((.cse1 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse1 .cse2) 4294967296) 4294967296) .cse3) .cse1)) (< .cse0 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (or (< .cse4 (mod c_~a~0 4294967296)) (let ((.cse5 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse5 .cse2) 4294967296) 4294967296) .cse3) .cse5))) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse6 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 .cse4) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse6) (let ((.cse7 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse7 .cse2) 4294967296) 4294967296) .cse3) .cse7)) (< .cse6 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))))) is different from false [2022-12-13 12:15:16,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:15:23,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:15:25,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:15:27,140 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) (.cse3 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 0) (< 1 .cse0) (let ((.cse1 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse1 .cse2) 4294967296) 4294967296) .cse3) .cse1)) (< .cse0 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (let ((.cse4 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse4 .cse2) 4294967296) 4294967296) .cse3) .cse4)) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse5 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse5) (let ((.cse6 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse6 .cse2) 4294967296) 4294967296) .cse3) .cse6)) (< .cse5 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))))) is different from false [2022-12-13 12:15:33,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:15:35,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:15:41,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:15:43,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:15:45,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:15:47,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:15:49,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:15:51,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:15:53,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:15:55,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:15:57,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:15:59,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:02,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:04,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:06,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:08,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:10,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:12,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:14,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:16,224 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) (.cse2 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (< .cse0 (mod (+ c_~b~0 c_~a~0) 4294967296)) (= c_thread2Thread1of1ForFork2_~i~1 0) (let ((.cse1 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse1 .cse0) 4294967296) 4294967296) .cse2) .cse1)) (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse3 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse3) (let ((.cse4 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ (* (div (+ .cse4 .cse0) 4294967296) 4294967296) .cse2) .cse4)) (< .cse3 0) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))))) is different from false [2022-12-13 12:16:18,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:20,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:22,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:25,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:27,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:29,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:31,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:33,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:35,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:35,972 INFO L130 PetriNetUnfolder]: 3327/5231 cut-off events. [2022-12-13 12:16:35,973 INFO L131 PetriNetUnfolder]: For 39040/39040 co-relation queries the response was YES. [2022-12-13 12:16:35,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26759 conditions, 5231 events. 3327/5231 cut-off events. For 39040/39040 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 29659 event pairs, 524 based on Foata normal form. 66/5297 useless extension candidates. Maximal degree in co-relation 23893. Up to 1827 conditions per place. [2022-12-13 12:16:36,002 INFO L137 encePairwiseOnDemand]: 171/184 looper letters, 251 selfloop transitions, 138 changer transitions 5/394 dead transitions. [2022-12-13 12:16:36,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 394 transitions, 3886 flow [2022-12-13 12:16:36,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 12:16:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-13 12:16:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2393 transitions. [2022-12-13 12:16:36,007 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48168276972624796 [2022-12-13 12:16:36,007 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2393 transitions. [2022-12-13 12:16:36,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2393 transitions. [2022-12-13 12:16:36,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:16:36,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2393 transitions. [2022-12-13 12:16:36,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 88.62962962962963) internal successors, (2393), 27 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:16:36,024 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) [2022-12-13 12:16:36,025 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) [2022-12-13 12:16:36,025 INFO L175 Difference]: Start difference. First operand has 80 places, 81 transitions, 856 flow. Second operand 27 states and 2393 transitions. [2022-12-13 12:16:36,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 394 transitions, 3886 flow [2022-12-13 12:16:36,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 394 transitions, 3826 flow, removed 30 selfloop flow, removed 1 redundant places. [2022-12-13 12:16:36,080 INFO L231 Difference]: Finished difference. Result has 129 places, 192 transitions, 2661 flow [2022-12-13 12:16:36,080 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2661, PETRI_PLACES=129, PETRI_TRANSITIONS=192} [2022-12-13 12:16:36,080 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 100 predicate places. [2022-12-13 12:16:36,080 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 192 transitions, 2661 flow [2022-12-13 12:16:36,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 80.1875) internal successors, (1283), 16 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:16:36,081 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:16:36,081 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:16:36,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 12:16:36,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:16:36,282 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)] === [2022-12-13 12:16:36,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:16:36,283 INFO L85 PathProgramCache]: Analyzing trace with hash 675470903, now seen corresponding path program 4 times [2022-12-13 12:16:36,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:16:36,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195015664] [2022-12-13 12:16:36,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:16:36,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:16:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:16:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:16:36,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:16:36,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195015664] [2022-12-13 12:16:36,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195015664] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:16:36,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532086841] [2022-12-13 12:16:36,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:16:36,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:16:36,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:16:36,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:16:36,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 12:16:36,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:16:36,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:16:36,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:16:36,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:16:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:16:36,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:16:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:16:36,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532086841] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:16:36,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:16:36,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 10 [2022-12-13 12:16:36,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425035308] [2022-12-13 12:16:36,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:16:36,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 12:16:36,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:16:36,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 12:16:36,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:16:36,745 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2022-12-13 12:16:36,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 192 transitions, 2661 flow. Second operand has 10 states, 10 states have (on average 84.1) internal successors, (841), 10 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:16:36,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:16:36,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2022-12-13 12:16:36,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:16:38,418 INFO L130 PetriNetUnfolder]: 4687/7409 cut-off events. [2022-12-13 12:16:38,418 INFO L131 PetriNetUnfolder]: For 172473/172473 co-relation queries the response was YES. [2022-12-13 12:16:38,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60421 conditions, 7409 events. 4687/7409 cut-off events. For 172473/172473 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 45277 event pairs, 515 based on Foata normal form. 26/7435 useless extension candidates. Maximal degree in co-relation 51848. Up to 3062 conditions per place. [2022-12-13 12:16:38,467 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 290 selfloop transitions, 149 changer transitions 6/445 dead transitions. [2022-12-13 12:16:38,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 445 transitions, 6573 flow [2022-12-13 12:16:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 12:16:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 12:16:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1505 transitions. [2022-12-13 12:16:38,480 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5112092391304348 [2022-12-13 12:16:38,480 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1505 transitions. [2022-12-13 12:16:38,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1505 transitions. [2022-12-13 12:16:38,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:16:38,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1505 transitions. [2022-12-13 12:16:38,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.0625) internal successors, (1505), 16 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:16:38,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 184.0) internal successors, (3128), 17 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:16:38,490 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 184.0) internal successors, (3128), 17 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:16:38,491 INFO L175 Difference]: Start difference. First operand has 129 places, 192 transitions, 2661 flow. Second operand 16 states and 1505 transitions. [2022-12-13 12:16:38,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 445 transitions, 6573 flow [2022-12-13 12:16:38,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 445 transitions, 6105 flow, removed 234 selfloop flow, removed 0 redundant places. [2022-12-13 12:16:38,913 INFO L231 Difference]: Finished difference. Result has 153 places, 262 transitions, 3871 flow [2022-12-13 12:16:38,913 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3871, PETRI_PLACES=153, PETRI_TRANSITIONS=262} [2022-12-13 12:16:38,914 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 124 predicate places. [2022-12-13 12:16:38,914 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 262 transitions, 3871 flow [2022-12-13 12:16:38,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 84.1) internal successors, (841), 10 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:16:38,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:16:38,914 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:16:38,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 12:16:39,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:16:39,116 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)] === [2022-12-13 12:16:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:16:39,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1271344511, now seen corresponding path program 5 times [2022-12-13 12:16:39,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:16:39,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006989043] [2022-12-13 12:16:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:16:39,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:16:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:16:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:16:39,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:16:39,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006989043] [2022-12-13 12:16:39,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006989043] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:16:39,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669639997] [2022-12-13 12:16:39,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:16:39,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:16:39,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:16:39,304 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:16:39,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 12:16:39,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:16:39,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:16:39,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:16:39,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:16:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:16:39,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:16:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:16:39,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669639997] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:16:39,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:16:39,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2022-12-13 12:16:39,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340711386] [2022-12-13 12:16:39,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:16:39,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:16:39,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:16:39,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:16:39,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-13 12:16:39,602 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 184 [2022-12-13 12:16:39,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 262 transitions, 3871 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:16:39,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:16:39,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 184 [2022-12-13 12:16:39,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:16:41,277 INFO L130 PetriNetUnfolder]: 5309/8407 cut-off events. [2022-12-13 12:16:41,277 INFO L131 PetriNetUnfolder]: For 241926/242069 co-relation queries the response was YES. [2022-12-13 12:16:41,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73911 conditions, 8407 events. 5309/8407 cut-off events. For 241926/242069 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 52909 event pairs, 1399 based on Foata normal form. 45/8423 useless extension candidates. Maximal degree in co-relation 66488. Up to 3620 conditions per place. [2022-12-13 12:16:41,357 INFO L137 encePairwiseOnDemand]: 177/184 looper letters, 245 selfloop transitions, 140 changer transitions 3/396 dead transitions. [2022-12-13 12:16:41,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 396 transitions, 6491 flow [2022-12-13 12:16:41,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:16:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:16:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 777 transitions. [2022-12-13 12:16:41,359 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5278532608695652 [2022-12-13 12:16:41,359 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 777 transitions. [2022-12-13 12:16:41,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 777 transitions. [2022-12-13 12:16:41,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:16:41,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 777 transitions. [2022-12-13 12:16:41,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.125) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:16:41,363 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) [2022-12-13 12:16:41,363 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) [2022-12-13 12:16:41,363 INFO L175 Difference]: Start difference. First operand has 153 places, 262 transitions, 3871 flow. Second operand 8 states and 777 transitions. [2022-12-13 12:16:41,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 396 transitions, 6491 flow [2022-12-13 12:16:42,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 396 transitions, 6122 flow, removed 130 selfloop flow, removed 3 redundant places. [2022-12-13 12:16:42,069 INFO L231 Difference]: Finished difference. Result has 163 places, 297 transitions, 4728 flow [2022-12-13 12:16:42,069 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4728, PETRI_PLACES=163, PETRI_TRANSITIONS=297} [2022-12-13 12:16:42,070 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 134 predicate places. [2022-12-13 12:16:42,070 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 297 transitions, 4728 flow [2022-12-13 12:16:42,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:16:42,070 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:16:42,070 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:16:42,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 12:16:42,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:16:42,271 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)] === [2022-12-13 12:16:42,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:16:42,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1800091613, now seen corresponding path program 6 times [2022-12-13 12:16:42,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:16:42,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859259706] [2022-12-13 12:16:42,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:16:42,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:16:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:16:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:16:42,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:16:42,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859259706] [2022-12-13 12:16:42,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859259706] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:16:42,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115689271] [2022-12-13 12:16:42,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:16:42,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:16:42,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:16:42,403 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:16:42,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 12:16:42,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 12:16:42,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:16:42,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 12:16:42,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:16:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:16:42,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:16:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:16:55,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115689271] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:16:55,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:16:55,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 12:16:55,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958258943] [2022-12-13 12:16:55,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:16:55,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 12:16:55,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:16:55,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 12:16:55,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=204, Unknown=5, NotChecked=0, Total=272 [2022-12-13 12:16:57,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:59,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:16:59,932 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 184 [2022-12-13 12:16:59,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 297 transitions, 4728 flow. Second operand has 17 states, 17 states have (on average 79.70588235294117) internal successors, (1355), 17 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:16:59,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:16:59,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 184 [2022-12-13 12:16:59,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:17:02,255 INFO L130 PetriNetUnfolder]: 5989/9698 cut-off events. [2022-12-13 12:17:02,255 INFO L131 PetriNetUnfolder]: For 272515/272515 co-relation queries the response was YES. [2022-12-13 12:17:02,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86849 conditions, 9698 events. 5989/9698 cut-off events. For 272515/272515 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 64575 event pairs, 1551 based on Foata normal form. 52/9750 useless extension candidates. Maximal degree in co-relation 85501. Up to 4243 conditions per place. [2022-12-13 12:17:02,331 INFO L137 encePairwiseOnDemand]: 174/184 looper letters, 289 selfloop transitions, 245 changer transitions 7/541 dead transitions. [2022-12-13 12:17:02,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 541 transitions, 9149 flow [2022-12-13 12:17:02,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 12:17:02,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 12:17:02,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1425 transitions. [2022-12-13 12:17:02,334 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48403532608695654 [2022-12-13 12:17:02,334 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1425 transitions. [2022-12-13 12:17:02,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1425 transitions. [2022-12-13 12:17:02,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:17:02,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1425 transitions. [2022-12-13 12:17:02,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 89.0625) internal successors, (1425), 16 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:02,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 184.0) internal successors, (3128), 17 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:02,339 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 184.0) internal successors, (3128), 17 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:02,339 INFO L175 Difference]: Start difference. First operand has 163 places, 297 transitions, 4728 flow. Second operand 16 states and 1425 transitions. [2022-12-13 12:17:02,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 541 transitions, 9149 flow [2022-12-13 12:17:03,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 541 transitions, 9101 flow, removed 24 selfloop flow, removed 0 redundant places. [2022-12-13 12:17:03,104 INFO L231 Difference]: Finished difference. Result has 184 places, 370 transitions, 6716 flow [2022-12-13 12:17:03,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6716, PETRI_PLACES=184, PETRI_TRANSITIONS=370} [2022-12-13 12:17:03,105 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2022-12-13 12:17:03,105 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 370 transitions, 6716 flow [2022-12-13 12:17:03,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 79.70588235294117) internal successors, (1355), 17 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:03,106 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:17:03,106 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:17:03,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 12:17:03,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 12:17:03,308 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)] === [2022-12-13 12:17:03,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:03,309 INFO L85 PathProgramCache]: Analyzing trace with hash 354791349, now seen corresponding path program 7 times [2022-12-13 12:17:03,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:03,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956570675] [2022-12-13 12:17:03,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:03,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:03,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:03,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956570675] [2022-12-13 12:17:03,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956570675] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:17:03,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378411275] [2022-12-13 12:17:03,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:17:03,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:03,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:03,474 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:17:03,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 12:17:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:03,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:17:03,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:17:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:03,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:17:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:03,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378411275] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:17:03,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:17:03,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2022-12-13 12:17:03,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415159099] [2022-12-13 12:17:03,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:03,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:17:03,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:17:03,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-13 12:17:03,977 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 184 [2022-12-13 12:17:03,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 370 transitions, 6716 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:03,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:17:03,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 184 [2022-12-13 12:17:03,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:17:05,812 INFO L130 PetriNetUnfolder]: 5839/9515 cut-off events. [2022-12-13 12:17:05,812 INFO L131 PetriNetUnfolder]: For 296407/296520 co-relation queries the response was YES. [2022-12-13 12:17:05,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88290 conditions, 9515 events. 5839/9515 cut-off events. For 296407/296520 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 63638 event pairs, 1644 based on Foata normal form. 30/9509 useless extension candidates. Maximal degree in co-relation 87239. Up to 4824 conditions per place. [2022-12-13 12:17:05,881 INFO L137 encePairwiseOnDemand]: 177/184 looper letters, 325 selfloop transitions, 93 changer transitions 1/435 dead transitions. [2022-12-13 12:17:05,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 435 transitions, 8465 flow [2022-12-13 12:17:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:17:05,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:17:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 580 transitions. [2022-12-13 12:17:05,883 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5253623188405797 [2022-12-13 12:17:05,883 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 580 transitions. [2022-12-13 12:17:05,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 580 transitions. [2022-12-13 12:17:05,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:17:05,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 580 transitions. [2022-12-13 12:17:05,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:05,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:05,885 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:05,885 INFO L175 Difference]: Start difference. First operand has 184 places, 370 transitions, 6716 flow. Second operand 6 states and 580 transitions. [2022-12-13 12:17:05,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 435 transitions, 8465 flow [2022-12-13 12:17:06,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 435 transitions, 8334 flow, removed 65 selfloop flow, removed 1 redundant places. [2022-12-13 12:17:06,689 INFO L231 Difference]: Finished difference. Result has 191 places, 373 transitions, 6922 flow [2022-12-13 12:17:06,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=6611, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6922, PETRI_PLACES=191, PETRI_TRANSITIONS=373} [2022-12-13 12:17:06,690 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 162 predicate places. [2022-12-13 12:17:06,690 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 373 transitions, 6922 flow [2022-12-13 12:17:06,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:06,690 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:17:06,690 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:17:06,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 12:17:06,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:06,891 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)] === [2022-12-13 12:17:06,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:06,893 INFO L85 PathProgramCache]: Analyzing trace with hash -458899613, now seen corresponding path program 8 times [2022-12-13 12:17:06,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:06,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850025255] [2022-12-13 12:17:06,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:06,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:07,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:07,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850025255] [2022-12-13 12:17:07,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850025255] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:17:07,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013015382] [2022-12-13 12:17:07,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:17:07,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:07,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:07,030 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:17:07,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 12:17:07,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:17:07,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:17:07,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:17:07,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:17:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:07,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:17:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:07,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013015382] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:17:07,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:17:07,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 10 [2022-12-13 12:17:07,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008443756] [2022-12-13 12:17:07,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:07,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:17:07,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:07,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:17:07,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 12:17:07,314 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 184 [2022-12-13 12:17:07,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 373 transitions, 6922 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:07,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:17:07,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 184 [2022-12-13 12:17:07,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:17:09,145 INFO L130 PetriNetUnfolder]: 5813/9449 cut-off events. [2022-12-13 12:17:09,145 INFO L131 PetriNetUnfolder]: For 291577/291690 co-relation queries the response was YES. [2022-12-13 12:17:09,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88350 conditions, 9449 events. 5813/9449 cut-off events. For 291577/291690 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 63045 event pairs, 1808 based on Foata normal form. 30/9443 useless extension candidates. Maximal degree in co-relation 87264. Up to 5636 conditions per place. [2022-12-13 12:17:09,234 INFO L137 encePairwiseOnDemand]: 177/184 looper letters, 349 selfloop transitions, 71 changer transitions 1/437 dead transitions. [2022-12-13 12:17:09,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 437 transitions, 8616 flow [2022-12-13 12:17:09,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:17:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:17:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 582 transitions. [2022-12-13 12:17:09,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5271739130434783 [2022-12-13 12:17:09,236 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 582 transitions. [2022-12-13 12:17:09,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 582 transitions. [2022-12-13 12:17:09,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:17:09,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 582 transitions. [2022-12-13 12:17:09,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:09,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:09,241 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:09,241 INFO L175 Difference]: Start difference. First operand has 191 places, 373 transitions, 6922 flow. Second operand 6 states and 582 transitions. [2022-12-13 12:17:09,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 437 transitions, 8616 flow [2022-12-13 12:17:10,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 437 transitions, 8463 flow, removed 20 selfloop flow, removed 2 redundant places. [2022-12-13 12:17:10,224 INFO L231 Difference]: Finished difference. Result has 197 places, 376 transitions, 7025 flow [2022-12-13 12:17:10,224 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=6772, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7025, PETRI_PLACES=197, PETRI_TRANSITIONS=376} [2022-12-13 12:17:10,225 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 168 predicate places. [2022-12-13 12:17:10,225 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 376 transitions, 7025 flow [2022-12-13 12:17:10,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:10,225 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:17:10,225 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:17:10,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 12:17:10,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:10,427 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:17:10,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:10,428 INFO L85 PathProgramCache]: Analyzing trace with hash 6210566, now seen corresponding path program 3 times [2022-12-13 12:17:10,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:10,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691550485] [2022-12-13 12:17:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:10,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:10,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:10,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691550485] [2022-12-13 12:17:10,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691550485] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:17:10,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324412177] [2022-12-13 12:17:10,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:17:10,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:10,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:10,582 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:17:10,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 12:17:10,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 12:17:10,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:17:10,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:17:10,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:17:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:10,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:17:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:10,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324412177] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:17:10,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:17:10,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 12:17:10,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328233313] [2022-12-13 12:17:10,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:17:10,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 12:17:10,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:10,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 12:17:10,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-13 12:17:11,048 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2022-12-13 12:17:11,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 376 transitions, 7025 flow. Second operand has 13 states, 13 states have (on average 83.76923076923077) internal successors, (1089), 13 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:11,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:17:11,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2022-12-13 12:17:11,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:17:13,782 INFO L130 PetriNetUnfolder]: 7013/11360 cut-off events. [2022-12-13 12:17:13,782 INFO L131 PetriNetUnfolder]: For 333314/333314 co-relation queries the response was YES. [2022-12-13 12:17:13,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103849 conditions, 11360 events. 7013/11360 cut-off events. For 333314/333314 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 77906 event pairs, 2121 based on Foata normal form. 36/11396 useless extension candidates. Maximal degree in co-relation 102776. Up to 5116 conditions per place. [2022-12-13 12:17:13,871 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 307 selfloop transitions, 241 changer transitions 4/552 dead transitions. [2022-12-13 12:17:13,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 552 transitions, 10225 flow [2022-12-13 12:17:13,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:17:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 12:17:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1134 transitions. [2022-12-13 12:17:13,873 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5135869565217391 [2022-12-13 12:17:13,873 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1134 transitions. [2022-12-13 12:17:13,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1134 transitions. [2022-12-13 12:17:13,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:17:13,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1134 transitions. [2022-12-13 12:17:13,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 94.5) internal successors, (1134), 12 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:13,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 184.0) internal successors, (2392), 13 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:13,877 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 184.0) internal successors, (2392), 13 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:13,877 INFO L175 Difference]: Start difference. First operand has 197 places, 376 transitions, 7025 flow. Second operand 12 states and 1134 transitions. [2022-12-13 12:17:13,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 552 transitions, 10225 flow [2022-12-13 12:17:14,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 552 transitions, 10107 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-12-13 12:17:14,833 INFO L231 Difference]: Finished difference. Result has 213 places, 418 transitions, 8322 flow [2022-12-13 12:17:14,834 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=6923, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8322, PETRI_PLACES=213, PETRI_TRANSITIONS=418} [2022-12-13 12:17:14,834 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 184 predicate places. [2022-12-13 12:17:14,834 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 418 transitions, 8322 flow [2022-12-13 12:17:14,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 83.76923076923077) internal successors, (1089), 13 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:14,834 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:17:14,835 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:17:14,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 12:17:15,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:15,036 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:17:15,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:15,037 INFO L85 PathProgramCache]: Analyzing trace with hash 816215481, now seen corresponding path program 9 times [2022-12-13 12:17:15,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:15,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151311455] [2022-12-13 12:17:15,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:15,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:15,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:15,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151311455] [2022-12-13 12:17:15,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151311455] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:17:15,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916099995] [2022-12-13 12:17:15,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:17:15,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:15,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:15,204 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:17:15,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 12:17:15,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 12:17:15,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:17:15,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:17:15,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:17:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:15,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:17:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:15,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916099995] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:17:15,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:17:15,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2022-12-13 12:17:15,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237661350] [2022-12-13 12:17:15,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:15,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:17:15,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:15,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:17:15,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-12-13 12:17:15,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 184 [2022-12-13 12:17:15,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 418 transitions, 8322 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:15,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:17:15,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 184 [2022-12-13 12:17:15,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:17:17,982 INFO L130 PetriNetUnfolder]: 6836/11047 cut-off events. [2022-12-13 12:17:17,983 INFO L131 PetriNetUnfolder]: For 353090/353268 co-relation queries the response was YES. [2022-12-13 12:17:18,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105529 conditions, 11047 events. 6836/11047 cut-off events. For 353090/353268 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 75247 event pairs, 2347 based on Foata normal form. 33/11000 useless extension candidates. Maximal degree in co-relation 104433. Up to 5720 conditions per place. [2022-12-13 12:17:18,072 INFO L137 encePairwiseOnDemand]: 177/184 looper letters, 379 selfloop transitions, 79 changer transitions 1/476 dead transitions. [2022-12-13 12:17:18,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 476 transitions, 10029 flow [2022-12-13 12:17:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:17:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:17:18,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 580 transitions. [2022-12-13 12:17:18,074 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5253623188405797 [2022-12-13 12:17:18,074 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 580 transitions. [2022-12-13 12:17:18,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 580 transitions. [2022-12-13 12:17:18,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:17:18,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 580 transitions. [2022-12-13 12:17:18,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:18,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:18,076 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:18,076 INFO L175 Difference]: Start difference. First operand has 213 places, 418 transitions, 8322 flow. Second operand 6 states and 580 transitions. [2022-12-13 12:17:18,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 476 transitions, 10029 flow [2022-12-13 12:17:19,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 476 transitions, 9814 flow, removed 40 selfloop flow, removed 2 redundant places. [2022-12-13 12:17:19,167 INFO L231 Difference]: Finished difference. Result has 218 places, 419 transitions, 8322 flow [2022-12-13 12:17:19,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=8107, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8322, PETRI_PLACES=218, PETRI_TRANSITIONS=419} [2022-12-13 12:17:19,167 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 189 predicate places. [2022-12-13 12:17:19,167 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 419 transitions, 8322 flow [2022-12-13 12:17:19,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:19,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:17:19,168 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:17:19,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 12:17:19,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:19,370 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:17:19,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:19,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1641241675, now seen corresponding path program 10 times [2022-12-13 12:17:19,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:19,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143537826] [2022-12-13 12:17:19,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:19,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:19,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:19,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143537826] [2022-12-13 12:17:19,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143537826] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:17:19,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373256188] [2022-12-13 12:17:19,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:17:19,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:19,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:19,484 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:17:19,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 12:17:19,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:17:19,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:17:19,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 12:17:19,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:17:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:19,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:17:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:19,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373256188] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 12:17:19,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:17:19,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 17 [2022-12-13 12:17:19,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719199415] [2022-12-13 12:17:19,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:19,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:17:19,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:19,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:17:19,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-12-13 12:17:19,922 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 184 [2022-12-13 12:17:19,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 419 transitions, 8322 flow. Second operand has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:19,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:17:19,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 184 [2022-12-13 12:17:19,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:17:22,305 INFO L130 PetriNetUnfolder]: 6804/10975 cut-off events. [2022-12-13 12:17:22,306 INFO L131 PetriNetUnfolder]: For 351268/351448 co-relation queries the response was YES. [2022-12-13 12:17:22,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104292 conditions, 10975 events. 6804/10975 cut-off events. For 351268/351448 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 74310 event pairs, 2195 based on Foata normal form. 41/10936 useless extension candidates. Maximal degree in co-relation 103193. Up to 4908 conditions per place. [2022-12-13 12:17:22,415 INFO L137 encePairwiseOnDemand]: 177/184 looper letters, 354 selfloop transitions, 101 changer transitions 1/473 dead transitions. [2022-12-13 12:17:22,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 473 transitions, 9975 flow [2022-12-13 12:17:22,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:17:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 12:17:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 576 transitions. [2022-12-13 12:17:22,416 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2022-12-13 12:17:22,416 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 576 transitions. [2022-12-13 12:17:22,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 576 transitions. [2022-12-13 12:17:22,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:17:22,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 576 transitions. [2022-12-13 12:17:22,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.0) internal successors, (576), 6 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:22,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:22,418 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 184.0) internal successors, (1288), 7 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:22,418 INFO L175 Difference]: Start difference. First operand has 218 places, 419 transitions, 8322 flow. Second operand 6 states and 576 transitions. [2022-12-13 12:17:22,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 473 transitions, 9975 flow [2022-12-13 12:17:23,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 473 transitions, 9805 flow, removed 17 selfloop flow, removed 3 redundant places. [2022-12-13 12:17:23,618 INFO L231 Difference]: Finished difference. Result has 222 places, 420 transitions, 8409 flow [2022-12-13 12:17:23,618 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=8154, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8409, PETRI_PLACES=222, PETRI_TRANSITIONS=420} [2022-12-13 12:17:23,618 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 193 predicate places. [2022-12-13 12:17:23,618 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 420 transitions, 8409 flow [2022-12-13 12:17:23,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:23,618 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:17:23,619 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:17:23,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 12:17:23,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 12:17:23,820 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:17:23,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:23,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1729946011, now seen corresponding path program 2 times [2022-12-13 12:17:23,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:23,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508559876] [2022-12-13 12:17:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:23,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:23,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:23,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:23,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508559876] [2022-12-13 12:17:23,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508559876] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:17:23,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:17:23,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 12:17:23,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208060454] [2022-12-13 12:17:23,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:23,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:17:23,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:23,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:17:23,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:17:24,020 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2022-12-13 12:17:24,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 420 transitions, 8409 flow. Second operand has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:24,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:17:24,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2022-12-13 12:17:24,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:17:26,499 INFO L130 PetriNetUnfolder]: 7172/11597 cut-off events. [2022-12-13 12:17:26,499 INFO L131 PetriNetUnfolder]: For 368565/368565 co-relation queries the response was YES. [2022-12-13 12:17:26,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109480 conditions, 11597 events. 7172/11597 cut-off events. For 368565/368565 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 79596 event pairs, 2384 based on Foata normal form. 42/11639 useless extension candidates. Maximal degree in co-relation 108355. Up to 6910 conditions per place. [2022-12-13 12:17:26,621 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 452 selfloop transitions, 96 changer transitions 16/564 dead transitions. [2022-12-13 12:17:26,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 564 transitions, 11707 flow [2022-12-13 12:17:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 12:17:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 12:17:26,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 737 transitions. [2022-12-13 12:17:26,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5006793478260869 [2022-12-13 12:17:26,623 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 737 transitions. [2022-12-13 12:17:26,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 737 transitions. [2022-12-13 12:17:26,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:17:26,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 737 transitions. [2022-12-13 12:17:26,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 92.125) internal successors, (737), 8 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:26,626 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) [2022-12-13 12:17:26,626 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) [2022-12-13 12:17:26,626 INFO L175 Difference]: Start difference. First operand has 222 places, 420 transitions, 8409 flow. Second operand 8 states and 737 transitions. [2022-12-13 12:17:26,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 564 transitions, 11707 flow [2022-12-13 12:17:27,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 564 transitions, 11509 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-12-13 12:17:27,939 INFO L231 Difference]: Finished difference. Result has 231 places, 442 transitions, 8947 flow [2022-12-13 12:17:27,939 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=8211, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8947, PETRI_PLACES=231, PETRI_TRANSITIONS=442} [2022-12-13 12:17:27,939 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 202 predicate places. [2022-12-13 12:17:27,940 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 442 transitions, 8947 flow [2022-12-13 12:17:27,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:27,940 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:17:27,940 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:17:27,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 12:17:27,940 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:17:27,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:27,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1651995315, now seen corresponding path program 3 times [2022-12-13 12:17:27,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:27,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393170541] [2022-12-13 12:17:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:27,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:28,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:28,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393170541] [2022-12-13 12:17:28,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393170541] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:17:28,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:17:28,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 12:17:28,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807668762] [2022-12-13 12:17:28,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:28,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:17:28,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:28,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:17:28,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:17:28,114 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2022-12-13 12:17:28,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 442 transitions, 8947 flow. Second operand has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:28,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:17:28,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2022-12-13 12:17:28,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:17:30,702 INFO L130 PetriNetUnfolder]: 7112/11535 cut-off events. [2022-12-13 12:17:30,702 INFO L131 PetriNetUnfolder]: For 405716/405716 co-relation queries the response was YES. [2022-12-13 12:17:30,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112326 conditions, 11535 events. 7112/11535 cut-off events. For 405716/405716 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 79414 event pairs, 2410 based on Foata normal form. 78/11613 useless extension candidates. Maximal degree in co-relation 111773. Up to 6674 conditions per place. [2022-12-13 12:17:30,802 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 421 selfloop transitions, 147 changer transitions 18/586 dead transitions. [2022-12-13 12:17:30,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 586 transitions, 12254 flow [2022-12-13 12:17:30,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:17:30,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:17:30,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 924 transitions. [2022-12-13 12:17:30,804 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5021739130434782 [2022-12-13 12:17:30,804 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 924 transitions. [2022-12-13 12:17:30,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 924 transitions. [2022-12-13 12:17:30,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:17:30,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 924 transitions. [2022-12-13 12:17:30,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 92.4) internal successors, (924), 10 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:30,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:30,806 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:30,806 INFO L175 Difference]: Start difference. First operand has 231 places, 442 transitions, 8947 flow. Second operand 10 states and 924 transitions. [2022-12-13 12:17:30,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 586 transitions, 12254 flow [2022-12-13 12:17:32,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 586 transitions, 12065 flow, removed 23 selfloop flow, removed 3 redundant places. [2022-12-13 12:17:32,207 INFO L231 Difference]: Finished difference. Result has 241 places, 472 transitions, 9920 flow [2022-12-13 12:17:32,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=8790, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9920, PETRI_PLACES=241, PETRI_TRANSITIONS=472} [2022-12-13 12:17:32,208 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 212 predicate places. [2022-12-13 12:17:32,208 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 472 transitions, 9920 flow [2022-12-13 12:17:32,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:32,208 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:17:32,209 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:17:32,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 12:17:32,209 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:17:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:32,209 INFO L85 PathProgramCache]: Analyzing trace with hash -21986235, now seen corresponding path program 4 times [2022-12-13 12:17:32,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:32,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218019854] [2022-12-13 12:17:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:32,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:32,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:32,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218019854] [2022-12-13 12:17:32,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218019854] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:17:32,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:17:32,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 12:17:32,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559787120] [2022-12-13 12:17:32,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:32,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:17:32,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:32,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:17:32,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:17:32,483 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 184 [2022-12-13 12:17:32,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 472 transitions, 9920 flow. Second operand has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:32,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:17:32,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 184 [2022-12-13 12:17:32,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:17:35,335 INFO L130 PetriNetUnfolder]: 7027/11390 cut-off events. [2022-12-13 12:17:35,335 INFO L131 PetriNetUnfolder]: For 459748/459748 co-relation queries the response was YES. [2022-12-13 12:17:35,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116012 conditions, 11390 events. 7027/11390 cut-off events. For 459748/459748 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 78105 event pairs, 2508 based on Foata normal form. 18/11408 useless extension candidates. Maximal degree in co-relation 114902. Up to 7070 conditions per place. [2022-12-13 12:17:35,454 INFO L137 encePairwiseOnDemand]: 176/184 looper letters, 462 selfloop transitions, 88 changer transitions 11/561 dead transitions. [2022-12-13 12:17:35,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 561 transitions, 12324 flow [2022-12-13 12:17:35,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:17:35,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:17:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 654 transitions. [2022-12-13 12:17:35,456 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5077639751552795 [2022-12-13 12:17:35,456 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 654 transitions. [2022-12-13 12:17:35,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 654 transitions. [2022-12-13 12:17:35,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:17:35,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 654 transitions. [2022-12-13 12:17:35,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.42857142857143) internal successors, (654), 7 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:35,458 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) [2022-12-13 12:17:35,458 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) [2022-12-13 12:17:35,458 INFO L175 Difference]: Start difference. First operand has 241 places, 472 transitions, 9920 flow. Second operand 7 states and 654 transitions. [2022-12-13 12:17:35,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 561 transitions, 12324 flow [2022-12-13 12:17:37,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 561 transitions, 12118 flow, removed 76 selfloop flow, removed 1 redundant places. [2022-12-13 12:17:37,392 INFO L231 Difference]: Finished difference. Result has 247 places, 471 transitions, 9874 flow [2022-12-13 12:17:37,393 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=9685, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9874, PETRI_PLACES=247, PETRI_TRANSITIONS=471} [2022-12-13 12:17:37,393 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 218 predicate places. [2022-12-13 12:17:37,393 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 471 transitions, 9874 flow [2022-12-13 12:17:37,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:37,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:17:37,393 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:17:37,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 12:17:37,393 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:17:37,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:37,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1198342848, now seen corresponding path program 4 times [2022-12-13 12:17:37,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:37,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483940287] [2022-12-13 12:17:37,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:37,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:37,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:37,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483940287] [2022-12-13 12:17:37,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483940287] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:17:37,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499174674] [2022-12-13 12:17:37,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:17:37,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:37,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:37,497 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:17:37,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 12:17:37,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:17:37,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:17:37,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 12:17:37,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:17:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:37,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:17:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:40,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499174674] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:17:40,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:17:40,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-12-13 12:17:40,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542243213] [2022-12-13 12:17:40,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:17:40,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 12:17:40,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:40,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 12:17:40,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-12-13 12:17:41,097 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 184 [2022-12-13 12:17:41,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 471 transitions, 9874 flow. Second operand has 19 states, 19 states have (on average 80.3157894736842) internal successors, (1526), 19 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:41,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:17:41,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 184 [2022-12-13 12:17:41,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:17:45,635 INFO L130 PetriNetUnfolder]: 9951/16131 cut-off events. [2022-12-13 12:17:45,635 INFO L131 PetriNetUnfolder]: For 653466/653466 co-relation queries the response was YES. [2022-12-13 12:17:45,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165332 conditions, 16131 events. 9951/16131 cut-off events. For 653466/653466 co-relation queries the response was YES. Maximal size of possible extension queue 969. Compared 117561 event pairs, 1791 based on Foata normal form. 44/16175 useless extension candidates. Maximal degree in co-relation 163970. Up to 7077 conditions per place. [2022-12-13 12:17:45,817 INFO L137 encePairwiseOnDemand]: 174/184 looper letters, 507 selfloop transitions, 474 changer transitions 2/983 dead transitions. [2022-12-13 12:17:45,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 983 transitions, 21118 flow [2022-12-13 12:17:45,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 12:17:45,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 12:17:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2216 transitions. [2022-12-13 12:17:45,820 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4817391304347826 [2022-12-13 12:17:45,820 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2216 transitions. [2022-12-13 12:17:45,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2216 transitions. [2022-12-13 12:17:45,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:17:45,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2216 transitions. [2022-12-13 12:17:45,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 88.64) internal successors, (2216), 25 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:45,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 184.0) internal successors, (4784), 26 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:45,826 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 184.0) internal successors, (4784), 26 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:45,826 INFO L175 Difference]: Start difference. First operand has 247 places, 471 transitions, 9874 flow. Second operand 25 states and 2216 transitions. [2022-12-13 12:17:45,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 983 transitions, 21118 flow [2022-12-13 12:17:48,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 983 transitions, 20884 flow, removed 30 selfloop flow, removed 5 redundant places. [2022-12-13 12:17:48,702 INFO L231 Difference]: Finished difference. Result has 279 places, 661 transitions, 15644 flow [2022-12-13 12:17:48,702 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=9647, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=15644, PETRI_PLACES=279, PETRI_TRANSITIONS=661} [2022-12-13 12:17:48,702 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 250 predicate places. [2022-12-13 12:17:48,703 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 661 transitions, 15644 flow [2022-12-13 12:17:48,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 80.3157894736842) internal successors, (1526), 19 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:48,703 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:17:48,703 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:17:48,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 12:17:48,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:48,904 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:17:48,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:48,905 INFO L85 PathProgramCache]: Analyzing trace with hash 4549142, now seen corresponding path program 5 times [2022-12-13 12:17:48,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:48,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932289218] [2022-12-13 12:17:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:48,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:49,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:49,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932289218] [2022-12-13 12:17:49,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932289218] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:17:49,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:17:49,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 12:17:49,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073441136] [2022-12-13 12:17:49,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:17:49,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:17:49,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:49,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:17:49,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:17:49,077 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2022-12-13 12:17:49,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 661 transitions, 15644 flow. Second operand has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:49,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:17:49,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2022-12-13 12:17:49,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:17:53,238 INFO L130 PetriNetUnfolder]: 9955/16133 cut-off events. [2022-12-13 12:17:53,238 INFO L131 PetriNetUnfolder]: For 777361/777361 co-relation queries the response was YES. [2022-12-13 12:17:53,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180132 conditions, 16133 events. 9955/16133 cut-off events. For 777361/777361 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 116520 event pairs, 4045 based on Foata normal form. 20/16153 useless extension candidates. Maximal degree in co-relation 178863. Up to 11376 conditions per place. [2022-12-13 12:17:53,443 INFO L137 encePairwiseOnDemand]: 176/184 looper letters, 628 selfloop transitions, 92 changer transitions 2/722 dead transitions. [2022-12-13 12:17:53,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 722 transitions, 17935 flow [2022-12-13 12:17:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:17:53,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:17:53,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 642 transitions. [2022-12-13 12:17:53,445 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4984472049689441 [2022-12-13 12:17:53,445 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 642 transitions. [2022-12-13 12:17:53,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 642 transitions. [2022-12-13 12:17:53,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:17:53,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 642 transitions. [2022-12-13 12:17:53,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 91.71428571428571) internal successors, (642), 7 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:53,447 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) [2022-12-13 12:17:53,447 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) [2022-12-13 12:17:53,447 INFO L175 Difference]: Start difference. First operand has 279 places, 661 transitions, 15644 flow. Second operand 7 states and 642 transitions. [2022-12-13 12:17:53,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 722 transitions, 17935 flow [2022-12-13 12:17:57,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 722 transitions, 17095 flow, removed 110 selfloop flow, removed 6 redundant places. [2022-12-13 12:17:57,136 INFO L231 Difference]: Finished difference. Result has 280 places, 662 transitions, 15028 flow [2022-12-13 12:17:57,137 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=14810, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15028, PETRI_PLACES=280, PETRI_TRANSITIONS=662} [2022-12-13 12:17:57,137 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 251 predicate places. [2022-12-13 12:17:57,137 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 662 transitions, 15028 flow [2022-12-13 12:17:57,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:57,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:17:57,137 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:17:57,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 12:17:57,137 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:17:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:17:57,138 INFO L85 PathProgramCache]: Analyzing trace with hash 970436096, now seen corresponding path program 6 times [2022-12-13 12:17:57,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:17:57,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998218913] [2022-12-13 12:17:57,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:17:57,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:17:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:17:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:57,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:17:57,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998218913] [2022-12-13 12:17:57,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998218913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:17:57,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276317874] [2022-12-13 12:17:57,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:17:57,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:17:57,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:17:57,239 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:17:57,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 12:17:57,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 12:17:57,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:17:57,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:17:57,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:17:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:57,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:17:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:17:57,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276317874] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:17:57,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:17:57,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2022-12-13 12:17:57,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548323148] [2022-12-13 12:17:57,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:17:57,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 12:17:57,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:17:57,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 12:17:57,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-12-13 12:17:57,983 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 184 [2022-12-13 12:17:57,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 662 transitions, 15028 flow. Second operand has 15 states, 15 states have (on average 82.2) internal successors, (1233), 15 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:17:57,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:17:57,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 184 [2022-12-13 12:17:57,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:18:03,227 INFO L130 PetriNetUnfolder]: 10291/16711 cut-off events. [2022-12-13 12:18:03,228 INFO L131 PetriNetUnfolder]: For 775344/775344 co-relation queries the response was YES. [2022-12-13 12:18:03,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181806 conditions, 16711 events. 10291/16711 cut-off events. For 775344/775344 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 122341 event pairs, 2361 based on Foata normal form. 56/16767 useless extension candidates. Maximal degree in co-relation 180905. Up to 7256 conditions per place. [2022-12-13 12:18:03,413 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 754 selfloop transitions, 199 changer transitions 2/955 dead transitions. [2022-12-13 12:18:03,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 955 transitions, 22001 flow [2022-12-13 12:18:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 12:18:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 12:18:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1627 transitions. [2022-12-13 12:18:03,416 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.491243961352657 [2022-12-13 12:18:03,416 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1627 transitions. [2022-12-13 12:18:03,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1627 transitions. [2022-12-13 12:18:03,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:18:03,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1627 transitions. [2022-12-13 12:18:03,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 90.38888888888889) internal successors, (1627), 18 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:18:03,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 184.0) internal successors, (3496), 19 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:18:03,420 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 184.0) internal successors, (3496), 19 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:18:03,420 INFO L175 Difference]: Start difference. First operand has 280 places, 662 transitions, 15028 flow. Second operand 18 states and 1627 transitions. [2022-12-13 12:18:03,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 955 transitions, 22001 flow [2022-12-13 12:18:07,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 955 transitions, 21781 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 12:18:07,098 INFO L231 Difference]: Finished difference. Result has 303 places, 711 transitions, 16696 flow [2022-12-13 12:18:07,098 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=14798, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=16696, PETRI_PLACES=303, PETRI_TRANSITIONS=711} [2022-12-13 12:18:07,098 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 274 predicate places. [2022-12-13 12:18:07,099 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 711 transitions, 16696 flow [2022-12-13 12:18:07,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.2) internal successors, (1233), 15 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:18:07,099 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:18:07,099 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:18:07,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 12:18:07,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:18:07,300 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:18:07,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:18:07,301 INFO L85 PathProgramCache]: Analyzing trace with hash -886950589, now seen corresponding path program 11 times [2022-12-13 12:18:07,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:18:07,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751371177] [2022-12-13 12:18:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:18:07,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:18:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:18:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:18:07,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:18:07,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751371177] [2022-12-13 12:18:07,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751371177] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:18:07,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:18:07,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 12:18:07,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800786384] [2022-12-13 12:18:07,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:18:07,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:18:07,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:18:07,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:18:07,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:18:07,497 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 184 [2022-12-13 12:18:07,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 711 transitions, 16696 flow. Second operand has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:18:07,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:18:07,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 184 [2022-12-13 12:18:07,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:18:12,699 INFO L130 PetriNetUnfolder]: 11115/18107 cut-off events. [2022-12-13 12:18:12,699 INFO L131 PetriNetUnfolder]: For 909794/909794 co-relation queries the response was YES. [2022-12-13 12:18:12,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201690 conditions, 18107 events. 11115/18107 cut-off events. For 909794/909794 co-relation queries the response was YES. Maximal size of possible extension queue 1094. Compared 134221 event pairs, 4350 based on Foata normal form. 30/18137 useless extension candidates. Maximal degree in co-relation 200888. Up to 11191 conditions per place. [2022-12-13 12:18:13,008 INFO L137 encePairwiseOnDemand]: 176/184 looper letters, 719 selfloop transitions, 130 changer transitions 1/850 dead transitions. [2022-12-13 12:18:13,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 850 transitions, 20954 flow [2022-12-13 12:18:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:18:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:18:13,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 671 transitions. [2022-12-13 12:18:13,010 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5209627329192547 [2022-12-13 12:18:13,010 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 671 transitions. [2022-12-13 12:18:13,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 671 transitions. [2022-12-13 12:18:13,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:18:13,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 671 transitions. [2022-12-13 12:18:13,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.85714285714286) internal successors, (671), 7 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:18:13,013 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) [2022-12-13 12:18:13,013 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) [2022-12-13 12:18:13,013 INFO L175 Difference]: Start difference. First operand has 303 places, 711 transitions, 16696 flow. Second operand 7 states and 671 transitions. [2022-12-13 12:18:13,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 850 transitions, 20954 flow [2022-12-13 12:18:18,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 850 transitions, 20575 flow, removed 67 selfloop flow, removed 5 redundant places. [2022-12-13 12:18:18,128 INFO L231 Difference]: Finished difference. Result has 307 places, 746 transitions, 17640 flow [2022-12-13 12:18:18,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=16337, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17640, PETRI_PLACES=307, PETRI_TRANSITIONS=746} [2022-12-13 12:18:18,129 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 278 predicate places. [2022-12-13 12:18:18,129 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 746 transitions, 17640 flow [2022-12-13 12:18:18,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:18:18,129 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:18:18,129 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:18:18,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 12:18:18,129 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:18:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:18:18,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2108353323, now seen corresponding path program 12 times [2022-12-13 12:18:18,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:18:18,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870607592] [2022-12-13 12:18:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:18:18,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:18:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:18:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:18:18,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:18:18,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870607592] [2022-12-13 12:18:18,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870607592] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:18:18,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048595069] [2022-12-13 12:18:18,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:18:18,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:18:18,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:18:18,224 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:18:18,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 12:18:18,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 12:18:18,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:18:18,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:18:18,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:18:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:18:18,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:18:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:18:18,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048595069] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:18:18,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:18:18,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2022-12-13 12:18:18,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219008078] [2022-12-13 12:18:18,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:18:18,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 12:18:18,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:18:18,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 12:18:18,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-12-13 12:18:18,925 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 184 [2022-12-13 12:18:18,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 746 transitions, 17640 flow. Second operand has 16 states, 16 states have (on average 82.125) internal successors, (1314), 16 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:18:18,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:18:18,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 184 [2022-12-13 12:18:18,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:18:31,031 INFO L130 PetriNetUnfolder]: 11783/19307 cut-off events. [2022-12-13 12:18:31,031 INFO L131 PetriNetUnfolder]: For 958413/958413 co-relation queries the response was YES. [2022-12-13 12:18:31,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215263 conditions, 19307 events. 11783/19307 cut-off events. For 958413/958413 co-relation queries the response was YES. Maximal size of possible extension queue 1186. Compared 146158 event pairs, 1322 based on Foata normal form. 32/19339 useless extension candidates. Maximal degree in co-relation 214464. Up to 8576 conditions per place. [2022-12-13 12:18:31,288 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 560 selfloop transitions, 713 changer transitions 3/1276 dead transitions. [2022-12-13 12:18:31,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1276 transitions, 30596 flow [2022-12-13 12:18:31,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 12:18:31,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 12:18:31,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2694 transitions. [2022-12-13 12:18:31,291 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4880434782608696 [2022-12-13 12:18:31,291 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2694 transitions. [2022-12-13 12:18:31,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2694 transitions. [2022-12-13 12:18:31,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:18:31,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2694 transitions. [2022-12-13 12:18:31,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 89.8) internal successors, (2694), 30 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:18:31,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 184.0) internal successors, (5704), 31 states have internal predecessors, (5704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:18:31,299 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 184.0) internal successors, (5704), 31 states have internal predecessors, (5704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:18:31,299 INFO L175 Difference]: Start difference. First operand has 307 places, 746 transitions, 17640 flow. Second operand 30 states and 2694 transitions. [2022-12-13 12:18:31,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1276 transitions, 30596 flow [2022-12-13 12:18:37,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1276 transitions, 30219 flow, removed 63 selfloop flow, removed 3 redundant places. [2022-12-13 12:18:37,174 INFO L231 Difference]: Finished difference. Result has 349 places, 989 transitions, 25738 flow [2022-12-13 12:18:37,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=17382, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=25738, PETRI_PLACES=349, PETRI_TRANSITIONS=989} [2022-12-13 12:18:37,175 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 320 predicate places. [2022-12-13 12:18:37,175 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 989 transitions, 25738 flow [2022-12-13 12:18:37,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.125) internal successors, (1314), 16 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:18:37,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:18:37,176 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:18:37,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 12:18:37,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 12:18:37,377 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:18:37,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:18:37,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1593627553, now seen corresponding path program 13 times [2022-12-13 12:18:37,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:18:37,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105138169] [2022-12-13 12:18:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:18:37,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:18:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:18:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:18:37,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:18:37,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105138169] [2022-12-13 12:18:37,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105138169] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:18:37,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139458982] [2022-12-13 12:18:37,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:18:37,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:18:37,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:18:37,503 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:18:37,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 12:18:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:18:37,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:18:37,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:18:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:18:37,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:18:40,004 WARN L837 $PredicateComparison]: unable to prove that (forall ((aux_mod_~a~0_21 Int)) (or (>= aux_mod_~a~0_21 4294967296) (<= aux_mod_~a~0_21 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (let ((.cse0 (* 4294967295 aux_mod_~a~0_21))) (< (+ (* 4294967296 (div .cse0 4294967296)) (mod c_thread2Thread1of1ForFork2_~i~1 4294967296)) .cse0)))) is different from false [2022-12-13 12:18:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 12:18:40,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139458982] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:18:40,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:18:40,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2022-12-13 12:18:40,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17315398] [2022-12-13 12:18:40,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:18:40,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 12:18:40,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:18:40,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 12:18:40,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=82, Unknown=1, NotChecked=18, Total=132 [2022-12-13 12:18:40,041 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 184 [2022-12-13 12:18:40,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 989 transitions, 25738 flow. Second operand has 12 states, 12 states have (on average 80.08333333333333) internal successors, (961), 12 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:18:40,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:18:40,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 184 [2022-12-13 12:18:40,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:18:42,449 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((aux_mod_~a~0_21 Int)) (or (>= aux_mod_~a~0_21 4294967296) (<= aux_mod_~a~0_21 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (let ((.cse0 (* 4294967295 aux_mod_~a~0_21))) (< (+ (* 4294967296 (div .cse0 4294967296)) (mod c_thread2Thread1of1ForFork2_~i~1 4294967296)) .cse0)))) (<= (div (+ c_~b~0 c_~a~0) 4294967296) (div (+ (- 1) c_~b~0 c_~a~0) 4294967296))) is different from false [2022-12-13 12:18:50,481 INFO L130 PetriNetUnfolder]: 13599/22059 cut-off events. [2022-12-13 12:18:50,481 INFO L131 PetriNetUnfolder]: For 1299844/1299844 co-relation queries the response was YES. [2022-12-13 12:18:50,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269343 conditions, 22059 events. 13599/22059 cut-off events. For 1299844/1299844 co-relation queries the response was YES. Maximal size of possible extension queue 1347. Compared 167855 event pairs, 3119 based on Foata normal form. 42/22101 useless extension candidates. Maximal degree in co-relation 268377. Up to 9888 conditions per place. [2022-12-13 12:18:50,921 INFO L137 encePairwiseOnDemand]: 170/184 looper letters, 683 selfloop transitions, 789 changer transitions 1/1473 dead transitions. [2022-12-13 12:18:50,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1473 transitions, 40115 flow [2022-12-13 12:18:50,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 12:18:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 12:18:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1526 transitions. [2022-12-13 12:18:50,924 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48785166240409206 [2022-12-13 12:18:50,924 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1526 transitions. [2022-12-13 12:18:50,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1526 transitions. [2022-12-13 12:18:50,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:18:50,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1526 transitions. [2022-12-13 12:18:50,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 89.76470588235294) internal successors, (1526), 17 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:18:50,928 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) [2022-12-13 12:18:50,929 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) [2022-12-13 12:18:50,929 INFO L175 Difference]: Start difference. First operand has 349 places, 989 transitions, 25738 flow. Second operand 17 states and 1526 transitions. [2022-12-13 12:18:50,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1473 transitions, 40115 flow [2022-12-13 12:19:01,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1473 transitions, 38433 flow, removed 504 selfloop flow, removed 4 redundant places. [2022-12-13 12:19:01,873 INFO L231 Difference]: Finished difference. Result has 372 places, 1227 transitions, 34141 flow [2022-12-13 12:19:01,874 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=24673, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=570, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=34141, PETRI_PLACES=372, PETRI_TRANSITIONS=1227} [2022-12-13 12:19:01,874 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 343 predicate places. [2022-12-13 12:19:01,874 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 1227 transitions, 34141 flow [2022-12-13 12:19:01,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.08333333333333) internal successors, (961), 12 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:19:01,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:19:01,875 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:19:01,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 12:19:02,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 12:19:02,076 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:19:02,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:19:02,077 INFO L85 PathProgramCache]: Analyzing trace with hash -782395783, now seen corresponding path program 14 times [2022-12-13 12:19:02,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:19:02,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101883621] [2022-12-13 12:19:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:19:02,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:19:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:19:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:19:02,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:19:02,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101883621] [2022-12-13 12:19:02,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101883621] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:19:02,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705602815] [2022-12-13 12:19:02,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:19:02,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:19:02,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:19:02,212 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:19:02,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 12:19:02,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:19:02,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:19:02,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:19:02,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:19:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:19:02,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:19:12,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:19:12,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705602815] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:19:12,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:19:12,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2022-12-13 12:19:12,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185336427] [2022-12-13 12:19:12,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:19:12,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 12:19:12,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:19:12,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 12:19:12,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=174, Unknown=4, NotChecked=0, Total=240 [2022-12-13 12:19:14,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:14,277 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2022-12-13 12:19:14,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 1227 transitions, 34141 flow. Second operand has 16 states, 16 states have (on average 83.25) internal successors, (1332), 16 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:19:14,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:19:14,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2022-12-13 12:19:14,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:19:16,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:18,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:20,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:22,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:24,661 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296)) (.cse0 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse1 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 .cse0) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse1) (< .cse1 0) (let ((.cse3 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ .cse2 (* (div .cse3 4294967296) 4294967296)) .cse3)) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (or (let ((.cse4 (* 4294967295 c_~a~0))) (< (+ .cse2 (* (div .cse4 4294967296) 4294967296)) .cse4)) (< .cse0 (mod c_~a~0 4294967296))))) is different from false [2022-12-13 12:19:26,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:28,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:30,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:32,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:34,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:36,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:38,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:41,027 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse0) (< .cse0 0) (let ((.cse2 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ .cse1 (* (div .cse2 4294967296) 4294967296)) .cse2)) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (let ((.cse3 (* 4294967295 c_~a~0))) (< (+ .cse1 (* (div .cse3 4294967296) 4294967296)) .cse3)))) is different from false [2022-12-13 12:19:43,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:45,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:47,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:49,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:51,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:53,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:55,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 12:19:58,200 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse0) (< .cse0 0) (let ((.cse2 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ .cse1 (* (div .cse2 4294967296) 4294967296)) .cse2)) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (let ((.cse3 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse3 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) 4294967296) 4294967296) .cse1) .cse3)))) is different from false [2022-12-13 12:20:01,319 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (mod c_thread2Thread1of1ForFork2_~i~1 4294967296))) (and (forall ((aux_div_aux_mod_~a~0_21_32 Int) (aux_mod_aux_mod_~a~0_21_32 Int)) (let ((.cse0 (+ aux_mod_aux_mod_~a~0_21_32 (* aux_div_aux_mod_~a~0_21_32 4294967296)))) (or (<= aux_mod_aux_mod_~a~0_21_32 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296)) (< (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296) .cse0) (< .cse0 0) (let ((.cse2 (* aux_mod_aux_mod_~a~0_21_32 4294967295))) (< (+ .cse1 (* (div .cse2 4294967296) 4294967296)) .cse2)) (>= aux_mod_aux_mod_~a~0_21_32 4294967296)))) (< .cse1 (mod c_~b~0 4294967296)) (let ((.cse3 (* 4294967295 c_~a~0))) (< (+ (* (div (+ .cse3 (mod c_thread3Thread1of1ForFork0_~i~2 4294967296)) 4294967296) 4294967296) .cse1) .cse3)))) is different from false [2022-12-13 12:20:09,797 INFO L130 PetriNetUnfolder]: 15885/25253 cut-off events. [2022-12-13 12:20:09,797 INFO L131 PetriNetUnfolder]: For 1714697/1714697 co-relation queries the response was YES. [2022-12-13 12:20:10,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336331 conditions, 25253 events. 15885/25253 cut-off events. For 1714697/1714697 co-relation queries the response was YES. Maximal size of possible extension queue 1538. Compared 190625 event pairs, 3651 based on Foata normal form. 74/25327 useless extension candidates. Maximal degree in co-relation 335267. Up to 18881 conditions per place. [2022-12-13 12:20:10,240 INFO L137 encePairwiseOnDemand]: 170/184 looper letters, 1262 selfloop transitions, 570 changer transitions 1/1833 dead transitions. [2022-12-13 12:20:10,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1833 transitions, 53637 flow [2022-12-13 12:20:10,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 12:20:10,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 12:20:10,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2249 transitions. [2022-12-13 12:20:10,243 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48891304347826087 [2022-12-13 12:20:10,243 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2249 transitions. [2022-12-13 12:20:10,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2249 transitions. [2022-12-13 12:20:10,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:10,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2249 transitions. [2022-12-13 12:20:10,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 89.96) internal successors, (2249), 25 states have internal predecessors, (2249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:20:10,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 184.0) internal successors, (4784), 26 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:20:10,248 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 184.0) internal successors, (4784), 26 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:20:10,249 INFO L175 Difference]: Start difference. First operand has 372 places, 1227 transitions, 34141 flow. Second operand 25 states and 2249 transitions. [2022-12-13 12:20:10,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1833 transitions, 53637 flow [2022-12-13 12:20:23,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1833 transitions, 52534 flow, removed 460 selfloop flow, removed 2 redundant places. [2022-12-13 12:20:23,859 INFO L231 Difference]: Finished difference. Result has 407 places, 1525 transitions, 43599 flow [2022-12-13 12:20:23,860 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=33209, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=804, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=43599, PETRI_PLACES=407, PETRI_TRANSITIONS=1525} [2022-12-13 12:20:23,860 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 378 predicate places. [2022-12-13 12:20:23,860 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1525 transitions, 43599 flow [2022-12-13 12:20:23,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 83.25) internal successors, (1332), 16 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:20:23,861 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:23,861 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:20:23,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 12:20:24,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:24,062 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:20:24,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:24,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1389074081, now seen corresponding path program 15 times [2022-12-13 12:20:24,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:24,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399812395] [2022-12-13 12:20:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:24,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:20:24,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:24,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399812395] [2022-12-13 12:20:24,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399812395] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:20:24,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:20:24,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 12:20:24,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426892554] [2022-12-13 12:20:24,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:20:24,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:20:24,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:24,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:20:24,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:20:24,285 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 184 [2022-12-13 12:20:24,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1525 transitions, 43599 flow. Second operand has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:20:24,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:24,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 184 [2022-12-13 12:20:24,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:20:36,083 INFO L130 PetriNetUnfolder]: 15889/25261 cut-off events. [2022-12-13 12:20:36,083 INFO L131 PetriNetUnfolder]: For 2027453/2027453 co-relation queries the response was YES. [2022-12-13 12:20:36,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370368 conditions, 25261 events. 15889/25261 cut-off events. For 2027453/2027453 co-relation queries the response was YES. Maximal size of possible extension queue 1534. Compared 190112 event pairs, 3960 based on Foata normal form. 2/25263 useless extension candidates. Maximal degree in co-relation 369223. Up to 18769 conditions per place. [2022-12-13 12:20:36,636 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 1383 selfloop transitions, 232 changer transitions 4/1619 dead transitions. [2022-12-13 12:20:36,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1619 transitions, 48663 flow [2022-12-13 12:20:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:20:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:20:36,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 909 transitions. [2022-12-13 12:20:36,638 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4940217391304348 [2022-12-13 12:20:36,638 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 909 transitions. [2022-12-13 12:20:36,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 909 transitions. [2022-12-13 12:20:36,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:20:36,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 909 transitions. [2022-12-13 12:20:36,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 90.9) internal successors, (909), 10 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:20:36,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:20:36,642 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:20:36,642 INFO L175 Difference]: Start difference. First operand has 407 places, 1525 transitions, 43599 flow. Second operand 10 states and 909 transitions. [2022-12-13 12:20:36,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1619 transitions, 48663 flow [2022-12-13 12:20:53,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 1619 transitions, 46911 flow, removed 848 selfloop flow, removed 1 redundant places. [2022-12-13 12:20:53,989 INFO L231 Difference]: Finished difference. Result has 417 places, 1528 transitions, 42596 flow [2022-12-13 12:20:53,990 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=42016, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=42596, PETRI_PLACES=417, PETRI_TRANSITIONS=1528} [2022-12-13 12:20:53,990 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 388 predicate places. [2022-12-13 12:20:53,990 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 1528 transitions, 42596 flow [2022-12-13 12:20:53,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:20:53,991 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:20:53,991 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:20:53,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 12:20:53,991 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:20:53,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:20:53,991 INFO L85 PathProgramCache]: Analyzing trace with hash -60689186, now seen corresponding path program 7 times [2022-12-13 12:20:53,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:20:53,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958191731] [2022-12-13 12:20:53,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:20:53,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:20:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:20:54,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:20:54,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958191731] [2022-12-13 12:20:54,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958191731] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:20:54,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409938485] [2022-12-13 12:20:54,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:20:54,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:20:54,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:20:54,090 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:20:54,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 12:20:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:20:54,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:20:54,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:20:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:20:54,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:20:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:20:58,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409938485] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:20:58,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:20:58,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2022-12-13 12:20:58,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792408049] [2022-12-13 12:20:58,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:20:58,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 12:20:58,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:20:58,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 12:20:58,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-12-13 12:20:58,938 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 184 [2022-12-13 12:20:58,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 1528 transitions, 42596 flow. Second operand has 17 states, 17 states have (on average 82.3529411764706) internal successors, (1400), 17 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:20:58,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:20:58,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 184 [2022-12-13 12:20:58,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:21:14,703 INFO L130 PetriNetUnfolder]: 17447/27895 cut-off events. [2022-12-13 12:21:14,703 INFO L131 PetriNetUnfolder]: For 2237645/2237645 co-relation queries the response was YES. [2022-12-13 12:21:15,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398197 conditions, 27895 events. 17447/27895 cut-off events. For 2237645/2237645 co-relation queries the response was YES. Maximal size of possible extension queue 1710. Compared 215296 event pairs, 3420 based on Foata normal form. 70/27965 useless extension candidates. Maximal degree in co-relation 397031. Up to 11902 conditions per place. [2022-12-13 12:21:15,298 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 1575 selfloop transitions, 478 changer transitions 1/2054 dead transitions. [2022-12-13 12:21:15,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 2054 transitions, 59067 flow [2022-12-13 12:21:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 12:21:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 12:21:15,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2205 transitions. [2022-12-13 12:21:15,301 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.499320652173913 [2022-12-13 12:21:15,302 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2205 transitions. [2022-12-13 12:21:15,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2205 transitions. [2022-12-13 12:21:15,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:21:15,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2205 transitions. [2022-12-13 12:21:15,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 91.875) internal successors, (2205), 24 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:21:15,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 184.0) internal successors, (4600), 25 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:21:15,307 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 184.0) internal successors, (4600), 25 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:21:15,307 INFO L175 Difference]: Start difference. First operand has 417 places, 1528 transitions, 42596 flow. Second operand 24 states and 2205 transitions. [2022-12-13 12:21:15,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 2054 transitions, 59067 flow [2022-12-13 12:21:33,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 2054 transitions, 58128 flow, removed 38 selfloop flow, removed 9 redundant places. [2022-12-13 12:21:33,633 INFO L231 Difference]: Finished difference. Result has 449 places, 1660 transitions, 47219 flow [2022-12-13 12:21:33,634 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=41877, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=47219, PETRI_PLACES=449, PETRI_TRANSITIONS=1660} [2022-12-13 12:21:33,634 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 420 predicate places. [2022-12-13 12:21:33,635 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 1660 transitions, 47219 flow [2022-12-13 12:21:33,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.3529411764706) internal successors, (1400), 17 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:21:33,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:21:33,635 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:21:33,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 12:21:33,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:21:33,836 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:21:33,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:21:33,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1168335277, now seen corresponding path program 16 times [2022-12-13 12:21:33,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:21:33,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259312843] [2022-12-13 12:21:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:21:33,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:21:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:21:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:21:33,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:21:33,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259312843] [2022-12-13 12:21:33,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259312843] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:21:33,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:21:33,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 12:21:33,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85146235] [2022-12-13 12:21:33,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:21:33,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:21:33,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:21:33,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:21:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:21:34,014 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2022-12-13 12:21:34,014 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 1660 transitions, 47219 flow. Second operand has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:21:34,014 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:21:34,014 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2022-12-13 12:21:34,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:21:48,543 INFO L130 PetriNetUnfolder]: 17446/27896 cut-off events. [2022-12-13 12:21:48,543 INFO L131 PetriNetUnfolder]: For 2407088/2407088 co-relation queries the response was YES. [2022-12-13 12:21:48,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411165 conditions, 27896 events. 17446/27896 cut-off events. For 2407088/2407088 co-relation queries the response was YES. Maximal size of possible extension queue 1705. Compared 215026 event pairs, 4616 based on Foata normal form. 2/27898 useless extension candidates. Maximal degree in co-relation 409994. Up to 20878 conditions per place. [2022-12-13 12:21:49,106 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 1471 selfloop transitions, 273 changer transitions 4/1748 dead transitions. [2022-12-13 12:21:49,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1748 transitions, 52324 flow [2022-12-13 12:21:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 12:21:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 12:21:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 987 transitions. [2022-12-13 12:21:49,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48764822134387353 [2022-12-13 12:21:49,108 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 987 transitions. [2022-12-13 12:21:49,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 987 transitions. [2022-12-13 12:21:49,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:21:49,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 987 transitions. [2022-12-13 12:21:49,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 89.72727272727273) internal successors, (987), 11 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) [2022-12-13 12:21:49,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 184.0) internal successors, (2208), 12 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:21:49,111 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 184.0) internal successors, (2208), 12 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:21:49,111 INFO L175 Difference]: Start difference. First operand has 449 places, 1660 transitions, 47219 flow. Second operand 11 states and 987 transitions. [2022-12-13 12:21:49,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1748 transitions, 52324 flow [2022-12-13 12:22:09,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1748 transitions, 51851 flow, removed 173 selfloop flow, removed 2 redundant places. [2022-12-13 12:22:09,286 INFO L231 Difference]: Finished difference. Result has 460 places, 1663 transitions, 47484 flow [2022-12-13 12:22:09,286 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=46774, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=47484, PETRI_PLACES=460, PETRI_TRANSITIONS=1663} [2022-12-13 12:22:09,287 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 431 predicate places. [2022-12-13 12:22:09,287 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 1663 transitions, 47484 flow [2022-12-13 12:22:09,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:22:09,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:22:09,287 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:22:09,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 12:22:09,287 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:22:09,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:22:09,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1595118389, now seen corresponding path program 5 times [2022-12-13 12:22:09,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:22:09,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746727615] [2022-12-13 12:22:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:22:09,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:22:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:22:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:22:09,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:22:09,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746727615] [2022-12-13 12:22:09,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746727615] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:22:09,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825279463] [2022-12-13 12:22:09,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:22:09,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:22:09,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:22:09,376 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:22:09,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 12:22:09,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:22:09,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:22:09,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 12:22:09,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:22:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:22:09,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:22:12,216 WARN L837 $PredicateComparison]: unable to prove that (forall ((aux_mod_~a~0_21 Int)) (or (let ((.cse0 (+ (* 4294967295 aux_mod_~a~0_21) 1))) (< (+ (* 4294967296 (div .cse0 4294967296)) (mod c_thread2Thread1of1ForFork2_~i~1 4294967296)) .cse0)) (< (mod c_thread1Thread1of1ForFork1_~i~0 4294967296) aux_mod_~a~0_21) (> 0 aux_mod_~a~0_21))) is different from false [2022-12-13 12:22:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:22:20,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825279463] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:22:20,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:22:20,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2022-12-13 12:22:20,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370422553] [2022-12-13 12:22:20,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:22:20,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 12:22:20,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:22:20,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 12:22:20,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=134, Unknown=5, NotChecked=24, Total=210 [2022-12-13 12:22:20,396 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 184 [2022-12-13 12:22:20,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 1663 transitions, 47484 flow. Second operand has 15 states, 15 states have (on average 79.2) internal successors, (1188), 15 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:22:20,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:22:20,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 184 [2022-12-13 12:22:20,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:22:36,715 INFO L130 PetriNetUnfolder]: 17535/28037 cut-off events. [2022-12-13 12:22:36,715 INFO L131 PetriNetUnfolder]: For 2413146/2413146 co-relation queries the response was YES. [2022-12-13 12:22:37,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411456 conditions, 28037 events. 17535/28037 cut-off events. For 2413146/2413146 co-relation queries the response was YES. Maximal size of possible extension queue 1722. Compared 216226 event pairs, 5362 based on Foata normal form. 20/28057 useless extension candidates. Maximal degree in co-relation 410255. Up to 20878 conditions per place. [2022-12-13 12:22:37,385 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 1552 selfloop transitions, 201 changer transitions 1/1754 dead transitions. [2022-12-13 12:22:37,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 1754 transitions, 52875 flow [2022-12-13 12:22:37,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:22:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 12:22:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1043 transitions. [2022-12-13 12:22:37,389 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4723731884057971 [2022-12-13 12:22:37,389 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1043 transitions. [2022-12-13 12:22:37,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1043 transitions. [2022-12-13 12:22:37,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:22:37,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1043 transitions. [2022-12-13 12:22:37,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 86.91666666666667) internal successors, (1043), 12 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:22:37,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 184.0) internal successors, (2392), 13 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:22:37,393 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 184.0) internal successors, (2392), 13 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:22:37,393 INFO L175 Difference]: Start difference. First operand has 460 places, 1663 transitions, 47484 flow. Second operand 12 states and 1043 transitions. [2022-12-13 12:22:37,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 1754 transitions, 52875 flow [2022-12-13 12:22:57,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1754 transitions, 52474 flow, removed 23 selfloop flow, removed 3 redundant places. [2022-12-13 12:22:57,246 INFO L231 Difference]: Finished difference. Result has 472 places, 1678 transitions, 48051 flow [2022-12-13 12:22:57,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=47066, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=48051, PETRI_PLACES=472, PETRI_TRANSITIONS=1678} [2022-12-13 12:22:57,248 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 443 predicate places. [2022-12-13 12:22:57,248 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 1678 transitions, 48051 flow [2022-12-13 12:22:57,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 79.2) internal successors, (1188), 15 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:22:57,248 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:22:57,248 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:22:57,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-13 12:22:57,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 12:22:57,450 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:22:57,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:22:57,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1711370967, now seen corresponding path program 17 times [2022-12-13 12:22:57,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:22:57,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11737746] [2022-12-13 12:22:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:22:57,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:22:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:22:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:22:57,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:22:57,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11737746] [2022-12-13 12:22:57,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11737746] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:22:57,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:22:57,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 12:22:57,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414288386] [2022-12-13 12:22:57,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:22:57,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:22:57,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:22:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:22:57,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:22:57,616 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2022-12-13 12:22:57,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 1678 transitions, 48051 flow. Second operand has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:22:57,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:22:57,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2022-12-13 12:22:57,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:23:12,322 INFO L130 PetriNetUnfolder]: 17534/28038 cut-off events. [2022-12-13 12:23:12,322 INFO L131 PetriNetUnfolder]: For 2566195/2566195 co-relation queries the response was YES. [2022-12-13 12:23:12,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415856 conditions, 28038 events. 17534/28038 cut-off events. For 2566195/2566195 co-relation queries the response was YES. Maximal size of possible extension queue 1721. Compared 216123 event pairs, 4884 based on Foata normal form. 2/28040 useless extension candidates. Maximal degree in co-relation 414676. Up to 20878 conditions per place. [2022-12-13 12:23:13,070 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 1540 selfloop transitions, 209 changer transitions 4/1753 dead transitions. [2022-12-13 12:23:13,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 1753 transitions, 53143 flow [2022-12-13 12:23:13,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:23:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:23:13,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 903 transitions. [2022-12-13 12:23:13,072 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4907608695652174 [2022-12-13 12:23:13,072 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 903 transitions. [2022-12-13 12:23:13,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 903 transitions. [2022-12-13 12:23:13,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:23:13,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 903 transitions. [2022-12-13 12:23:13,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 90.3) internal successors, (903), 10 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:23:13,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:23:13,076 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:23:13,076 INFO L175 Difference]: Start difference. First operand has 472 places, 1678 transitions, 48051 flow. Second operand 10 states and 903 transitions. [2022-12-13 12:23:13,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 1753 transitions, 53143 flow [2022-12-13 12:23:33,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 1753 transitions, 52709 flow, removed 120 selfloop flow, removed 3 redundant places. [2022-12-13 12:23:33,507 INFO L231 Difference]: Finished difference. Result has 481 places, 1682 transitions, 48200 flow [2022-12-13 12:23:33,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=47619, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=48200, PETRI_PLACES=481, PETRI_TRANSITIONS=1682} [2022-12-13 12:23:33,508 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 452 predicate places. [2022-12-13 12:23:33,508 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 1682 transitions, 48200 flow [2022-12-13 12:23:33,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:23:33,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:23:33,508 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:23:33,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 12:23:33,509 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:23:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:23:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2055824033, now seen corresponding path program 18 times [2022-12-13 12:23:33,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:23:33,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322315177] [2022-12-13 12:23:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:23:33,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:23:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:23:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:23:33,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:23:33,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322315177] [2022-12-13 12:23:33,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322315177] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:23:33,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:23:33,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 12:23:33,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64485774] [2022-12-13 12:23:33,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:23:33,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:23:33,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:23:33,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:23:33,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:23:33,665 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2022-12-13 12:23:33,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 1682 transitions, 48200 flow. Second operand has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:23:33,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:23:33,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2022-12-13 12:23:33,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:23:49,608 INFO L130 PetriNetUnfolder]: 17517/27999 cut-off events. [2022-12-13 12:23:49,608 INFO L131 PetriNetUnfolder]: For 2568371/2568371 co-relation queries the response was YES. [2022-12-13 12:23:50,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415668 conditions, 27999 events. 17517/27999 cut-off events. For 2568371/2568371 co-relation queries the response was YES. Maximal size of possible extension queue 1719. Compared 215601 event pairs, 5316 based on Foata normal form. 16/28015 useless extension candidates. Maximal degree in co-relation 414481. Up to 20820 conditions per place. [2022-12-13 12:23:50,283 INFO L137 encePairwiseOnDemand]: 176/184 looper letters, 1543 selfloop transitions, 188 changer transitions 1/1732 dead transitions. [2022-12-13 12:23:50,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1732 transitions, 52705 flow [2022-12-13 12:23:50,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:23:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:23:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 646 transitions. [2022-12-13 12:23:50,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5015527950310559 [2022-12-13 12:23:50,284 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 646 transitions. [2022-12-13 12:23:50,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 646 transitions. [2022-12-13 12:23:50,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:23:50,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 646 transitions. [2022-12-13 12:23:50,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 92.28571428571429) internal successors, (646), 7 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:23:50,286 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) [2022-12-13 12:23:50,286 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) [2022-12-13 12:23:50,287 INFO L175 Difference]: Start difference. First operand has 481 places, 1682 transitions, 48200 flow. Second operand 7 states and 646 transitions. [2022-12-13 12:23:50,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1732 transitions, 52705 flow [2022-12-13 12:24:09,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 1732 transitions, 52490 flow, removed 22 selfloop flow, removed 2 redundant places. [2022-12-13 12:24:09,830 INFO L231 Difference]: Finished difference. Result has 485 places, 1682 transitions, 48378 flow [2022-12-13 12:24:09,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=47993, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=48378, PETRI_PLACES=485, PETRI_TRANSITIONS=1682} [2022-12-13 12:24:09,831 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 456 predicate places. [2022-12-13 12:24:09,831 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 1682 transitions, 48378 flow [2022-12-13 12:24:09,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 83.85714285714286) internal successors, (587), 7 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:09,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:24:09,832 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:24:09,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-13 12:24:09,832 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:24:09,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:24:09,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1812276683, now seen corresponding path program 6 times [2022-12-13 12:24:09,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:24:09,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822785528] [2022-12-13 12:24:09,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:24:09,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:24:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:24:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:09,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:24:09,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822785528] [2022-12-13 12:24:09,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822785528] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:24:09,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215038564] [2022-12-13 12:24:09,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:24:09,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:24:09,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:24:09,924 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:24:09,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 12:24:10,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 12:24:10,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:24:10,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 12:24:10,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:24:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:10,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:24:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:10,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215038564] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:24:10,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:24:10,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2022-12-13 12:24:10,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976448371] [2022-12-13 12:24:10,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:24:10,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 12:24:10,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:24:10,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 12:24:10,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-12-13 12:24:10,799 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 184 [2022-12-13 12:24:10,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 1682 transitions, 48378 flow. Second operand has 15 states, 15 states have (on average 82.0) internal successors, (1230), 15 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:10,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:24:10,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 184 [2022-12-13 12:24:10,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:24:27,041 INFO L130 PetriNetUnfolder]: 17565/28081 cut-off events. [2022-12-13 12:24:27,041 INFO L131 PetriNetUnfolder]: For 2585984/2585984 co-relation queries the response was YES. [2022-12-13 12:24:27,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417363 conditions, 28081 events. 17565/28081 cut-off events. For 2585984/2585984 co-relation queries the response was YES. Maximal size of possible extension queue 1723. Compared 216599 event pairs, 5396 based on Foata normal form. 10/28091 useless extension candidates. Maximal degree in co-relation 416176. Up to 20856 conditions per place. [2022-12-13 12:24:27,687 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 1552 selfloop transitions, 204 changer transitions 1/1757 dead transitions. [2022-12-13 12:24:27,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 1757 transitions, 53681 flow [2022-12-13 12:24:27,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 12:24:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 12:24:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1065 transitions. [2022-12-13 12:24:27,690 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48233695652173914 [2022-12-13 12:24:27,690 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1065 transitions. [2022-12-13 12:24:27,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1065 transitions. [2022-12-13 12:24:27,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:24:27,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1065 transitions. [2022-12-13 12:24:27,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 88.75) internal successors, (1065), 12 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:27,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 184.0) internal successors, (2392), 13 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:27,693 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 184.0) internal successors, (2392), 13 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:27,693 INFO L175 Difference]: Start difference. First operand has 485 places, 1682 transitions, 48378 flow. Second operand 12 states and 1065 transitions. [2022-12-13 12:24:27,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 1757 transitions, 53681 flow [2022-12-13 12:24:47,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 1757 transitions, 53278 flow, removed 1 selfloop flow, removed 7 redundant places. [2022-12-13 12:24:47,861 INFO L231 Difference]: Finished difference. Result has 493 places, 1696 transitions, 48986 flow [2022-12-13 12:24:47,862 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=47961, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=48986, PETRI_PLACES=493, PETRI_TRANSITIONS=1696} [2022-12-13 12:24:47,862 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 464 predicate places. [2022-12-13 12:24:47,862 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 1696 transitions, 48986 flow [2022-12-13 12:24:47,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.0) internal successors, (1230), 15 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:47,862 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:24:47,863 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:24:47,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 12:24:48,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:24:48,063 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:24:48,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:24:48,064 INFO L85 PathProgramCache]: Analyzing trace with hash 702081204, now seen corresponding path program 8 times [2022-12-13 12:24:48,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:24:48,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463968427] [2022-12-13 12:24:48,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:24:48,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:24:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:24:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:48,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:24:48,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463968427] [2022-12-13 12:24:48,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463968427] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:24:48,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998453508] [2022-12-13 12:24:48,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:24:48,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:24:48,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:24:48,163 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:24:48,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 12:24:48,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:24:48,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:24:48,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:24:48,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:24:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:48,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:24:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:24:48,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998453508] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:24:48,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:24:48,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 12:24:48,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064842950] [2022-12-13 12:24:48,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:24:48,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 12:24:48,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:24:48,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 12:24:48,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-13 12:24:48,630 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2022-12-13 12:24:48,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 1696 transitions, 48986 flow. Second operand has 13 states, 13 states have (on average 83.53846153846153) internal successors, (1086), 13 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:24:48,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:24:48,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2022-12-13 12:24:48,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:04,532 INFO L130 PetriNetUnfolder]: 17785/28409 cut-off events. [2022-12-13 12:25:04,532 INFO L131 PetriNetUnfolder]: For 2785834/2785834 co-relation queries the response was YES. [2022-12-13 12:25:05,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427876 conditions, 28409 events. 17785/28409 cut-off events. For 2785834/2785834 co-relation queries the response was YES. Maximal size of possible extension queue 1754. Compared 219333 event pairs, 5152 based on Foata normal form. 80/28489 useless extension candidates. Maximal degree in co-relation 426552. Up to 20960 conditions per place. [2022-12-13 12:25:05,201 INFO L137 encePairwiseOnDemand]: 176/184 looper letters, 1487 selfloop transitions, 339 changer transitions 1/1827 dead transitions. [2022-12-13 12:25:05,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 1827 transitions, 55633 flow [2022-12-13 12:25:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:25:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:25:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 930 transitions. [2022-12-13 12:25:05,203 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5054347826086957 [2022-12-13 12:25:05,203 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 930 transitions. [2022-12-13 12:25:05,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 930 transitions. [2022-12-13 12:25:05,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:05,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 930 transitions. [2022-12-13 12:25:05,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 93.0) internal successors, (930), 10 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:05,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:05,205 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:05,205 INFO L175 Difference]: Start difference. First operand has 493 places, 1696 transitions, 48986 flow. Second operand 10 states and 930 transitions. [2022-12-13 12:25:05,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 1827 transitions, 55633 flow [2022-12-13 12:25:25,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1827 transitions, 55106 flow, removed 133 selfloop flow, removed 4 redundant places. [2022-12-13 12:25:25,827 INFO L231 Difference]: Finished difference. Result has 502 places, 1743 transitions, 50927 flow [2022-12-13 12:25:25,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=48481, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=50927, PETRI_PLACES=502, PETRI_TRANSITIONS=1743} [2022-12-13 12:25:25,829 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 473 predicate places. [2022-12-13 12:25:25,829 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 1743 transitions, 50927 flow [2022-12-13 12:25:25,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 83.53846153846153) internal successors, (1086), 13 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:25,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:25:25,829 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:25:25,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 12:25:26,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 12:25:26,030 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:25:26,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:25:26,030 INFO L85 PathProgramCache]: Analyzing trace with hash 617279379, now seen corresponding path program 19 times [2022-12-13 12:25:26,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:25:26,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350835145] [2022-12-13 12:25:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:25:26,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:25:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:25:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:25:26,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:25:26,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350835145] [2022-12-13 12:25:26,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350835145] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:25:26,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:25:26,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 12:25:26,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660829031] [2022-12-13 12:25:26,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:25:26,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:25:26,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:25:26,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:25:26,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:25:26,242 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 184 [2022-12-13 12:25:26,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 1743 transitions, 50927 flow. Second operand has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:26,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:25:26,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 184 [2022-12-13 12:25:26,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:25:42,265 INFO L130 PetriNetUnfolder]: 17779/28383 cut-off events. [2022-12-13 12:25:42,265 INFO L131 PetriNetUnfolder]: For 2792872/2792872 co-relation queries the response was YES. [2022-12-13 12:25:42,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429973 conditions, 28383 events. 17779/28383 cut-off events. For 2792872/2792872 co-relation queries the response was YES. Maximal size of possible extension queue 1749. Compared 218782 event pairs, 4894 based on Foata normal form. 2/28385 useless extension candidates. Maximal degree in co-relation 428606. Up to 20934 conditions per place. [2022-12-13 12:25:42,910 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 1569 selfloop transitions, 236 changer transitions 4/1809 dead transitions. [2022-12-13 12:25:42,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 1809 transitions, 56013 flow [2022-12-13 12:25:42,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:25:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 12:25:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 909 transitions. [2022-12-13 12:25:42,912 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4940217391304348 [2022-12-13 12:25:42,912 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 909 transitions. [2022-12-13 12:25:42,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 909 transitions. [2022-12-13 12:25:42,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:25:42,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 909 transitions. [2022-12-13 12:25:42,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 90.9) internal successors, (909), 10 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:42,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:42,915 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:25:42,915 INFO L175 Difference]: Start difference. First operand has 502 places, 1743 transitions, 50927 flow. Second operand 10 states and 909 transitions. [2022-12-13 12:25:42,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 1809 transitions, 56013 flow [2022-12-13 12:26:05,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1809 transitions, 55652 flow, removed 22 selfloop flow, removed 6 redundant places. [2022-12-13 12:26:05,472 INFO L231 Difference]: Finished difference. Result has 507 places, 1743 transitions, 51037 flow [2022-12-13 12:26:05,472 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=50520, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=51037, PETRI_PLACES=507, PETRI_TRANSITIONS=1743} [2022-12-13 12:26:05,473 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 478 predicate places. [2022-12-13 12:26:05,473 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 1743 transitions, 51037 flow [2022-12-13 12:26:05,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:26:05,473 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:26:05,473 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:26:05,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-13 12:26:05,473 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:26:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:05,473 INFO L85 PathProgramCache]: Analyzing trace with hash 100697939, now seen corresponding path program 20 times [2022-12-13 12:26:05,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:05,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920818947] [2022-12-13 12:26:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:05,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:26:05,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:05,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920818947] [2022-12-13 12:26:05,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920818947] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:26:05,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:26:05,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 12:26:05,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268540064] [2022-12-13 12:26:05,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:26:05,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 12:26:05,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:05,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 12:26:05,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 12:26:05,621 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 184 [2022-12-13 12:26:05,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 1743 transitions, 51037 flow. Second operand has 7 states, 7 states have (on average 85.85714285714286) internal successors, (601), 7 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:26:05,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:26:05,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 184 [2022-12-13 12:26:05,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 12:26:21,752 INFO L130 PetriNetUnfolder]: 17745/28295 cut-off events. [2022-12-13 12:26:21,752 INFO L131 PetriNetUnfolder]: For 2796840/2796840 co-relation queries the response was YES. [2022-12-13 12:26:22,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429514 conditions, 28295 events. 17745/28295 cut-off events. For 2796840/2796840 co-relation queries the response was YES. Maximal size of possible extension queue 1740. Compared 217590 event pairs, 5375 based on Foata normal form. 20/28315 useless extension candidates. Maximal degree in co-relation 428278. Up to 20581 conditions per place. [2022-12-13 12:26:22,433 INFO L137 encePairwiseOnDemand]: 176/184 looper letters, 1566 selfloop transitions, 246 changer transitions 1/1813 dead transitions. [2022-12-13 12:26:22,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 1813 transitions, 56187 flow [2022-12-13 12:26:22,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 12:26:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 12:26:22,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 667 transitions. [2022-12-13 12:26:22,434 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2022-12-13 12:26:22,434 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 667 transitions. [2022-12-13 12:26:22,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 667 transitions. [2022-12-13 12:26:22,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 12:26:22,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 667 transitions. [2022-12-13 12:26:22,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.28571428571429) internal successors, (667), 7 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:26:22,436 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) [2022-12-13 12:26:22,436 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) [2022-12-13 12:26:22,436 INFO L175 Difference]: Start difference. First operand has 507 places, 1743 transitions, 51037 flow. Second operand 7 states and 667 transitions. [2022-12-13 12:26:22,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 1813 transitions, 56187 flow [2022-12-13 12:26:43,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 1813 transitions, 55717 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-12-13 12:26:43,567 INFO L231 Difference]: Finished difference. Result has 508 places, 1745 transitions, 51164 flow [2022-12-13 12:26:43,568 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=50569, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=51164, PETRI_PLACES=508, PETRI_TRANSITIONS=1745} [2022-12-13 12:26:43,568 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 479 predicate places. [2022-12-13 12:26:43,568 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 1745 transitions, 51164 flow [2022-12-13 12:26:43,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 85.85714285714286) internal successors, (601), 7 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:26:43,568 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 12:26:43,568 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:26:43,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-13 12:26:43,569 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 12:26:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:26:43,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1027838310, now seen corresponding path program 9 times [2022-12-13 12:26:43,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:26:43,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213076783] [2022-12-13 12:26:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:26:43,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:26:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:26:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:26:43,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:26:43,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213076783] [2022-12-13 12:26:43,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213076783] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:26:43,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637581928] [2022-12-13 12:26:43,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:26:43,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:26:43,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:26:43,662 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:26:43,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1abd9b1f-bfe2-49ff-80e2-4e7b4dc1e840/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 12:26:43,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 12:26:43,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:26:43,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:26:43,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:26:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:26:43,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:26:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:26:43,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637581928] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:26:43,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:26:43,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-13 12:26:43,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835294086] [2022-12-13 12:26:43,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:26:43,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 12:26:43,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:26:43,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 12:26:43,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-13 12:26:44,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 184 [2022-12-13 12:26:44,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 1745 transitions, 51164 flow. Second operand has 13 states, 13 states have (on average 83.61538461538461) internal successors, (1087), 13 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:26:44,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 12:26:44,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 184 [2022-12-13 12:26:44,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand