./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/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_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/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_3949d5de-1091-4992-b3d9-1da87cf61014/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 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 --- 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 16:24:45,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:24:45,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:24:45,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:24:45,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:24:45,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:24:45,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:24:45,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:24:45,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:24:45,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:24:45,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:24:45,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:24:45,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:24:45,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:24:45,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:24:45,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:24:45,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:24:45,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:24:45,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:24:45,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:24:45,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:24:45,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:24:45,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:24:45,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:24:45,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:24:45,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:24:45,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:24:45,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:24:45,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:24:45,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:24:45,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:24:45,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:24:45,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:24:45,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:24:45,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:24:45,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:24:45,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:24:45,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:24:45,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:24:45,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:24:45,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:24:45,147 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:24:45,167 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:24:45,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:24:45,168 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:24:45,168 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:24:45,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:24:45,169 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:24:45,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:24:45,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:24:45,169 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:24:45,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:24:45,173 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:24:45,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:24:45,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:24:45,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:24:45,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:24:45,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:24:45,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:24:45,175 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:24:45,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:24:45,175 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:24:45,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:24:45,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:24:45,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:24:45,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:24:45,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:24:45,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:24:45,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:24:45,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:24:45,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:24:45,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:24:45,177 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:24:45,177 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:24:45,178 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:24:45,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:24:45,178 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:24:45,178 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_3949d5de-1091-4992-b3d9-1da87cf61014/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 [2022-12-13 16:24:45,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:24:45,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:24:45,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:24:45,364 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:24:45,364 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:24:45,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2022-12-13 16:24:47,938 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:24:48,080 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:24:48,080 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2022-12-13 16:24:48,086 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/data/40330e1e9/638c3b4d5a8b4b34b12ea7bc89f43086/FLAGcc8207511 [2022-12-13 16:24:48,098 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/data/40330e1e9/638c3b4d5a8b4b34b12ea7bc89f43086 [2022-12-13 16:24:48,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:24:48,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:24:48,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:24:48,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:24:48,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:24:48,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:24:48" (1/1) ... [2022-12-13 16:24:48,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a8ca53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:24:48, skipping insertion in model container [2022-12-13 16:24:48,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:24:48" (1/1) ... [2022-12-13 16:24:48,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:24:48,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:24:48,252 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,254 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,254 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,255 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,258 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,259 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,259 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,260 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,261 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,262 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,262 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,262 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,263 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,264 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,265 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,265 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,277 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_3949d5de-1091-4992-b3d9-1da87cf61014/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-12-13 16:24:48,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:24:48,296 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:24:48,305 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,306 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,306 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,307 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,307 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,308 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,308 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,308 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,309 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,309 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,309 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,310 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,310 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,311 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,311 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 16:24:48,311 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 16:24:48,316 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_3949d5de-1091-4992-b3d9-1da87cf61014/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-12-13 16:24:48,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:24:48,329 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:24:48,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:24:48 WrapperNode [2022-12-13 16:24:48,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:24:48,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:24:48,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:24:48,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:24:48,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:24:48" (1/1) ... [2022-12-13 16:24:48,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:24:48" (1/1) ... [2022-12-13 16:24:48,362 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 297 [2022-12-13 16:24:48,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:24:48,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:24:48,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:24:48,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:24:48,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:24:48" (1/1) ... [2022-12-13 16:24:48,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:24:48" (1/1) ... [2022-12-13 16:24:48,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:24:48" (1/1) ... [2022-12-13 16:24:48,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:24:48" (1/1) ... [2022-12-13 16:24:48,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:24:48" (1/1) ... [2022-12-13 16:24:48,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:24:48" (1/1) ... [2022-12-13 16:24:48,383 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:24:48" (1/1) ... [2022-12-13 16:24:48,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:24:48" (1/1) ... [2022-12-13 16:24:48,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:24:48,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:24:48,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:24:48,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:24:48,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:24:48" (1/1) ... [2022-12-13 16:24:48,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:24:48,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:24:48,414 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:24:48,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:24:48,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:24:48,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:24:48,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:24:48,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:24:48,446 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 16:24:48,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 16:24:48,446 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 16:24:48,446 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 16:24:48,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 16:24:48,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 16:24:48,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 16:24:48,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 16:24:48,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:24:48,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 16:24:48,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 16:24:48,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 16:24:48,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:24:48,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:24:48,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:24:48,449 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 16:24:48,538 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:24:48,540 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:24:48,890 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:24:49,012 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:24:49,012 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-13 16:24:49,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:24:49 BoogieIcfgContainer [2022-12-13 16:24:49,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:24:49,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:24:49,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:24:49,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:24:49,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:24:48" (1/3) ... [2022-12-13 16:24:49,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0f90b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:24:49, skipping insertion in model container [2022-12-13 16:24:49,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:24:48" (2/3) ... [2022-12-13 16:24:49,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0f90b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:24:49, skipping insertion in model container [2022-12-13 16:24:49,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:24:49" (3/3) ... [2022-12-13 16:24:49,020 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2022-12-13 16:24:49,027 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 16:24:49,034 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:24:49,035 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 16:24:49,035 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:24:49,088 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 16:24:49,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 206 transitions, 444 flow [2022-12-13 16:24:49,194 INFO L130 PetriNetUnfolder]: 15/202 cut-off events. [2022-12-13 16:24:49,194 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 16:24:49,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 202 events. 15/202 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 117 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 162. Up to 2 conditions per place. [2022-12-13 16:24:49,200 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 206 transitions, 444 flow [2022-12-13 16:24:49,204 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 187 places, 189 transitions, 402 flow [2022-12-13 16:24:49,208 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:24:49,218 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 187 places, 189 transitions, 402 flow [2022-12-13 16:24:49,220 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 187 places, 189 transitions, 402 flow [2022-12-13 16:24:49,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 187 places, 189 transitions, 402 flow [2022-12-13 16:24:49,258 INFO L130 PetriNetUnfolder]: 15/189 cut-off events. [2022-12-13 16:24:49,258 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 16:24:49,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 189 events. 15/189 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 115 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 162. Up to 2 conditions per place. [2022-12-13 16:24:49,260 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2022-12-13 16:24:55,325 INFO L134 LiptonReduction]: Checked pairs total: 3995 [2022-12-13 16:24:55,326 INFO L136 LiptonReduction]: Total number of compositions: 187 [2022-12-13 16:24:55,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:24:55,340 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;@70056be7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:24:55,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 16:24:55,346 INFO L130 PetriNetUnfolder]: 5/30 cut-off events. [2022-12-13 16:24:55,346 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 16:24:55,346 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:24:55,347 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:24:55,347 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 2 more)] === [2022-12-13 16:24:55,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:24:55,351 INFO L85 PathProgramCache]: Analyzing trace with hash -160531101, now seen corresponding path program 1 times [2022-12-13 16:24:55,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:24:55,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119205931] [2022-12-13 16:24:55,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:24:55,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:24:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:24:55,728 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 16:24:55,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:24:55,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119205931] [2022-12-13 16:24:55,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119205931] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:24:55,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:24:55,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:24:55,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479728660] [2022-12-13 16:24:55,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:24:55,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:24:55,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:24:55,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:24:55,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:24:55,770 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 393 [2022-12-13 16:24:55,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 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 16:24:55,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:24:55,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 393 [2022-12-13 16:24:55,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:24:56,109 INFO L130 PetriNetUnfolder]: 1952/2593 cut-off events. [2022-12-13 16:24:56,109 INFO L131 PetriNetUnfolder]: For 235/235 co-relation queries the response was YES. [2022-12-13 16:24:56,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 2593 events. 1952/2593 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9309 event pairs, 624 based on Foata normal form. 1/1889 useless extension candidates. Maximal degree in co-relation 4200. Up to 1650 conditions per place. [2022-12-13 16:24:56,120 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 51 selfloop transitions, 5 changer transitions 1/57 dead transitions. [2022-12-13 16:24:56,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 273 flow [2022-12-13 16:24:56,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:24:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:24:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2022-12-13 16:24:56,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4944868532654792 [2022-12-13 16:24:56,132 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2022-12-13 16:24:56,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2022-12-13 16:24:56,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:24:56,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2022-12-13 16:24:56,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 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 16:24:56,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 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 16:24:56,149 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 393.0) internal successors, (1572), 4 states have internal predecessors, (1572), 0 states have call successors, (0), 0 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 16:24:56,151 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 86 flow. Second operand 3 states and 583 transitions. [2022-12-13 16:24:56,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 273 flow [2022-12-13 16:24:56,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 243 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 16:24:56,156 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 103 flow [2022-12-13 16:24:56,158 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=34, PETRI_TRANSITIONS=35} [2022-12-13 16:24:56,160 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2022-12-13 16:24:56,161 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 103 flow [2022-12-13 16:24:56,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 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 16:24:56,161 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:24:56,161 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:24:56,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:24:56,162 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 2 more)] === [2022-12-13 16:24:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:24:56,162 INFO L85 PathProgramCache]: Analyzing trace with hash -315170381, now seen corresponding path program 1 times [2022-12-13 16:24:56,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:24:56,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124091638] [2022-12-13 16:24:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:24:56,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:24:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:24:56,342 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 16:24:56,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:24:56,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124091638] [2022-12-13 16:24:56,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124091638] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:24:56,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:24:56,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:24:56,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916070696] [2022-12-13 16:24:56,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:24:56,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:24:56,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:24:56,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:24:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:24:56,355 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 393 [2022-12-13 16:24:56,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 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 16:24:56,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:24:56,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 393 [2022-12-13 16:24:56,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:24:56,888 INFO L130 PetriNetUnfolder]: 4054/5355 cut-off events. [2022-12-13 16:24:56,888 INFO L131 PetriNetUnfolder]: For 965/965 co-relation queries the response was YES. [2022-12-13 16:24:56,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12916 conditions, 5355 events. 4054/5355 cut-off events. For 965/965 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 21850 event pairs, 804 based on Foata normal form. 1/3928 useless extension candidates. Maximal degree in co-relation 2214. Up to 2128 conditions per place. [2022-12-13 16:24:56,907 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 83 selfloop transitions, 8 changer transitions 1/92 dead transitions. [2022-12-13 16:24:56,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 92 transitions, 455 flow [2022-12-13 16:24:56,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:24:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:24:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 781 transitions. [2022-12-13 16:24:56,910 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49681933842239184 [2022-12-13 16:24:56,910 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 781 transitions. [2022-12-13 16:24:56,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 781 transitions. [2022-12-13 16:24:56,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:24:56,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 781 transitions. [2022-12-13 16:24:56,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 0 states have call successors, (0), 0 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 16:24:56,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 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 16:24:56,914 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 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 16:24:56,915 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 103 flow. Second operand 4 states and 781 transitions. [2022-12-13 16:24:56,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 92 transitions, 455 flow [2022-12-13 16:24:56,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 92 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:24:56,916 INFO L231 Difference]: Finished difference. Result has 39 places, 42 transitions, 158 flow [2022-12-13 16:24:56,916 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=39, PETRI_TRANSITIONS=42} [2022-12-13 16:24:56,917 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2022-12-13 16:24:56,917 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 42 transitions, 158 flow [2022-12-13 16:24:56,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 0 states have call successors, (0), 0 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 16:24:56,917 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:24:56,917 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:24:56,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:24:56,918 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 2 more)] === [2022-12-13 16:24:56,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:24:56,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1264795785, now seen corresponding path program 1 times [2022-12-13 16:24:56,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:24:56,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281173406] [2022-12-13 16:24:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:24:56,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:24:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:24:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:24:57,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:24:57,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281173406] [2022-12-13 16:24:57,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281173406] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:24:57,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:24:57,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:24:57,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806441007] [2022-12-13 16:24:57,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:24:57,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:24:57,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:24:57,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:24:57,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:24:57,144 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 393 [2022-12-13 16:24:57,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 42 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 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 16:24:57,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:24:57,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 393 [2022-12-13 16:24:57,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:24:57,870 INFO L130 PetriNetUnfolder]: 4785/6414 cut-off events. [2022-12-13 16:24:57,871 INFO L131 PetriNetUnfolder]: For 4278/4278 co-relation queries the response was YES. [2022-12-13 16:24:57,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17182 conditions, 6414 events. 4785/6414 cut-off events. For 4278/4278 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 26366 event pairs, 2809 based on Foata normal form. 239/6653 useless extension candidates. Maximal degree in co-relation 8677. Up to 5356 conditions per place. [2022-12-13 16:24:57,898 INFO L137 encePairwiseOnDemand]: 387/393 looper letters, 41 selfloop transitions, 2 changer transitions 28/71 dead transitions. [2022-12-13 16:24:57,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 71 transitions, 392 flow [2022-12-13 16:24:57,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:24:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 16:24:57,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 747 transitions. [2022-12-13 16:24:57,900 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4751908396946565 [2022-12-13 16:24:57,900 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 747 transitions. [2022-12-13 16:24:57,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 747 transitions. [2022-12-13 16:24:57,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:24:57,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 747 transitions. [2022-12-13 16:24:57,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.75) internal successors, (747), 4 states have internal predecessors, (747), 0 states have call successors, (0), 0 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 16:24:57,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 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 16:24:57,906 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 393.0) internal successors, (1965), 5 states have internal predecessors, (1965), 0 states have call successors, (0), 0 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 16:24:57,906 INFO L175 Difference]: Start difference. First operand has 39 places, 42 transitions, 158 flow. Second operand 4 states and 747 transitions. [2022-12-13 16:24:57,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 71 transitions, 392 flow [2022-12-13 16:24:57,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 71 transitions, 392 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:24:57,914 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 180 flow [2022-12-13 16:24:57,914 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2022-12-13 16:24:57,915 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2022-12-13 16:24:57,915 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 180 flow [2022-12-13 16:24:57,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 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 16:24:57,915 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:24:57,916 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:24:57,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 16:24:57,916 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 2 more)] === [2022-12-13 16:24:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:24:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1724746963, now seen corresponding path program 1 times [2022-12-13 16:24:57,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:24:57,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704630711] [2022-12-13 16:24:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:24:57,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:24:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:24:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:24:58,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:24:58,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704630711] [2022-12-13 16:24:58,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704630711] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:24:58,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932050684] [2022-12-13 16:24:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:24:58,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:24:58,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:24:58,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:24:58,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:24:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:24:58,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 16:24:58,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:24:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:24:58,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:24:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:24:58,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932050684] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:24:58,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:24:58,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2022-12-13 16:24:58,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260680020] [2022-12-13 16:24:58,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:24:58,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 16:24:58,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:24:58,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 16:24:58,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:24:58,594 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 393 [2022-12-13 16:24:58,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 180 flow. Second operand has 9 states, 9 states have (on average 176.11111111111111) internal successors, (1585), 9 states have internal predecessors, (1585), 0 states have call successors, (0), 0 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 16:24:58,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:24:58,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 393 [2022-12-13 16:24:58,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:24:59,651 INFO L130 PetriNetUnfolder]: 6835/9086 cut-off events. [2022-12-13 16:24:59,651 INFO L131 PetriNetUnfolder]: For 5789/5789 co-relation queries the response was YES. [2022-12-13 16:24:59,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25299 conditions, 9086 events. 6835/9086 cut-off events. For 5789/5789 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39948 event pairs, 330 based on Foata normal form. 134/9220 useless extension candidates. Maximal degree in co-relation 25283. Up to 4607 conditions per place. [2022-12-13 16:24:59,685 INFO L137 encePairwiseOnDemand]: 385/393 looper letters, 126 selfloop transitions, 23 changer transitions 36/185 dead transitions. [2022-12-13 16:24:59,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 185 transitions, 1005 flow [2022-12-13 16:24:59,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 16:24:59,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 16:24:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2018 transitions. [2022-12-13 16:24:59,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4668054591718714 [2022-12-13 16:24:59,693 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2018 transitions. [2022-12-13 16:24:59,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2018 transitions. [2022-12-13 16:24:59,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:24:59,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2018 transitions. [2022-12-13 16:24:59,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 183.45454545454547) internal successors, (2018), 11 states have internal predecessors, (2018), 0 states have call successors, (0), 0 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 16:24:59,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 393.0) internal successors, (4716), 12 states have internal predecessors, (4716), 0 states have call successors, (0), 0 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 16:24:59,703 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 393.0) internal successors, (4716), 12 states have internal predecessors, (4716), 0 states have call successors, (0), 0 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 16:24:59,703 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 180 flow. Second operand 11 states and 2018 transitions. [2022-12-13 16:24:59,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 185 transitions, 1005 flow [2022-12-13 16:24:59,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 185 transitions, 969 flow, removed 17 selfloop flow, removed 2 redundant places. [2022-12-13 16:24:59,717 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 352 flow [2022-12-13 16:24:59,717 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=352, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2022-12-13 16:24:59,718 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 17 predicate places. [2022-12-13 16:24:59,718 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 352 flow [2022-12-13 16:24:59,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 176.11111111111111) internal successors, (1585), 9 states have internal predecessors, (1585), 0 states have call successors, (0), 0 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 16:24:59,719 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:24:59,719 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:24:59,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:24:59,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:24:59,920 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 2 more)] === [2022-12-13 16:24:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:24:59,920 INFO L85 PathProgramCache]: Analyzing trace with hash 960868479, now seen corresponding path program 1 times [2022-12-13 16:24:59,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:24:59,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598442824] [2022-12-13 16:24:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:24:59,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:24:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:25:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:25:00,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:25:00,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598442824] [2022-12-13 16:25:00,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598442824] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:25:00,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481648818] [2022-12-13 16:25:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:25:00,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:25:00,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:25:00,675 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:25:00,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:25:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:25:00,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 16:25:00,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:25:00,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:25:00,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2022-12-13 16:25:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:25:00,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:25:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:25:01,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481648818] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:25:01,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:25:01,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 16 [2022-12-13 16:25:01,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654067396] [2022-12-13 16:25:01,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:25:01,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 16:25:01,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:25:01,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 16:25:01,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-12-13 16:25:01,450 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 393 [2022-12-13 16:25:01,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 61 transitions, 352 flow. Second operand has 17 states, 17 states have (on average 160.35294117647058) internal successors, (2726), 17 states have internal predecessors, (2726), 0 states have call successors, (0), 0 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 16:25:01,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:25:01,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 393 [2022-12-13 16:25:01,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:25:03,865 INFO L130 PetriNetUnfolder]: 13312/17531 cut-off events. [2022-12-13 16:25:03,866 INFO L131 PetriNetUnfolder]: For 18265/18265 co-relation queries the response was YES. [2022-12-13 16:25:03,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53151 conditions, 17531 events. 13312/17531 cut-off events. For 18265/18265 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 82193 event pairs, 733 based on Foata normal form. 2/17533 useless extension candidates. Maximal degree in co-relation 53122. Up to 10946 conditions per place. [2022-12-13 16:25:03,928 INFO L137 encePairwiseOnDemand]: 380/393 looper letters, 281 selfloop transitions, 176 changer transitions 43/500 dead transitions. [2022-12-13 16:25:03,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 500 transitions, 3181 flow [2022-12-13 16:25:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 16:25:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 16:25:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4295 transitions. [2022-12-13 16:25:03,935 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4371501272264631 [2022-12-13 16:25:03,935 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4295 transitions. [2022-12-13 16:25:03,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4295 transitions. [2022-12-13 16:25:03,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:25:03,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4295 transitions. [2022-12-13 16:25:03,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 171.8) internal successors, (4295), 25 states have internal predecessors, (4295), 0 states have call successors, (0), 0 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 16:25:04,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 393.0) internal successors, (10218), 26 states have internal predecessors, (10218), 0 states have call successors, (0), 0 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 16:25:04,003 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 393.0) internal successors, (10218), 26 states have internal predecessors, (10218), 0 states have call successors, (0), 0 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 16:25:04,003 INFO L175 Difference]: Start difference. First operand has 56 places, 61 transitions, 352 flow. Second operand 25 states and 4295 transitions. [2022-12-13 16:25:04,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 500 transitions, 3181 flow [2022-12-13 16:25:04,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 500 transitions, 2965 flow, removed 107 selfloop flow, removed 2 redundant places. [2022-12-13 16:25:04,043 INFO L231 Difference]: Finished difference. Result has 92 places, 245 transitions, 1898 flow [2022-12-13 16:25:04,044 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1898, PETRI_PLACES=92, PETRI_TRANSITIONS=245} [2022-12-13 16:25:04,044 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 53 predicate places. [2022-12-13 16:25:04,044 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 245 transitions, 1898 flow [2022-12-13 16:25:04,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 160.35294117647058) internal successors, (2726), 17 states have internal predecessors, (2726), 0 states have call successors, (0), 0 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 16:25:04,045 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:25:04,045 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:25:04,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:25:04,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:25:04,247 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 2 more)] === [2022-12-13 16:25:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:25:04,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1503424156, now seen corresponding path program 1 times [2022-12-13 16:25:04,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:25:04,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507754611] [2022-12-13 16:25:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:25:04,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:25:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:25:04,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:25:04,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:25:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507754611] [2022-12-13 16:25:04,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507754611] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:25:04,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221383861] [2022-12-13 16:25:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:25:04,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:25:04,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:25:04,778 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:25:04,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:25:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:25:04,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 16:25:04,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:25:04,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:25:04,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 16:25:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:25:05,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:25:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:25:05,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221383861] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:25:05,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:25:05,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2022-12-13 16:25:05,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227518647] [2022-12-13 16:25:05,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:25:05,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 16:25:05,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:25:05,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 16:25:05,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-13 16:25:05,344 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 393 [2022-12-13 16:25:05,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 245 transitions, 1898 flow. Second operand has 16 states, 16 states have (on average 161.5) internal successors, (2584), 16 states have internal predecessors, (2584), 0 states have call successors, (0), 0 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 16:25:05,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:25:05,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 393 [2022-12-13 16:25:05,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:25:08,248 INFO L130 PetriNetUnfolder]: 16307/21453 cut-off events. [2022-12-13 16:25:08,248 INFO L131 PetriNetUnfolder]: For 49203/49203 co-relation queries the response was YES. [2022-12-13 16:25:08,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82474 conditions, 21453 events. 16307/21453 cut-off events. For 49203/49203 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 104234 event pairs, 1305 based on Foata normal form. 2/21455 useless extension candidates. Maximal degree in co-relation 82431. Up to 17221 conditions per place. [2022-12-13 16:25:08,345 INFO L137 encePairwiseOnDemand]: 381/393 looper letters, 369 selfloop transitions, 190 changer transitions 41/600 dead transitions. [2022-12-13 16:25:08,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 600 transitions, 5007 flow [2022-12-13 16:25:08,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 16:25:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 16:25:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4444 transitions. [2022-12-13 16:25:08,352 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4349187707966334 [2022-12-13 16:25:08,352 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4444 transitions. [2022-12-13 16:25:08,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4444 transitions. [2022-12-13 16:25:08,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:25:08,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4444 transitions. [2022-12-13 16:25:08,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 170.92307692307693) internal successors, (4444), 26 states have internal predecessors, (4444), 0 states have call successors, (0), 0 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 16:25:08,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 393.0) internal successors, (10611), 27 states have internal predecessors, (10611), 0 states have call successors, (0), 0 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 16:25:08,368 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 393.0) internal successors, (10611), 27 states have internal predecessors, (10611), 0 states have call successors, (0), 0 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 16:25:08,368 INFO L175 Difference]: Start difference. First operand has 92 places, 245 transitions, 1898 flow. Second operand 26 states and 4444 transitions. [2022-12-13 16:25:08,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 600 transitions, 5007 flow [2022-12-13 16:25:08,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 600 transitions, 4781 flow, removed 83 selfloop flow, removed 3 redundant places. [2022-12-13 16:25:08,670 INFO L231 Difference]: Finished difference. Result has 123 places, 394 transitions, 3661 flow [2022-12-13 16:25:08,670 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=1712, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3661, PETRI_PLACES=123, PETRI_TRANSITIONS=394} [2022-12-13 16:25:08,670 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 84 predicate places. [2022-12-13 16:25:08,670 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 394 transitions, 3661 flow [2022-12-13 16:25:08,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 161.5) internal successors, (2584), 16 states have internal predecessors, (2584), 0 states have call successors, (0), 0 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 16:25:08,671 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:25:08,671 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:25:08,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:25:08,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 16:25:08,873 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 2 more)] === [2022-12-13 16:25:08,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:25:08,874 INFO L85 PathProgramCache]: Analyzing trace with hash 404737931, now seen corresponding path program 2 times [2022-12-13 16:25:08,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:25:08,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174574243] [2022-12-13 16:25:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:25:08,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:25:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:25:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:25:09,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:25:09,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174574243] [2022-12-13 16:25:09,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174574243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:25:09,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989608153] [2022-12-13 16:25:09,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:25:09,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:25:09,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:25:09,398 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:25:09,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:25:09,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:25:09,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:25:09,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 16:25:09,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:25:09,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:25:09,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 16:25:09,726 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-13 16:25:09,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-12-13 16:25:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:25:09,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:25:09,966 INFO L321 Elim1Store]: treesize reduction 10, result has 28.6 percent of original size [2022-12-13 16:25:09,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 34 [2022-12-13 16:25:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:25:10,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989608153] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:25:10,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:25:10,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2022-12-13 16:25:10,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953938828] [2022-12-13 16:25:10,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:25:10,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 16:25:10,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:25:10,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 16:25:10,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=568, Unknown=1, NotChecked=0, Total=702 [2022-12-13 16:25:10,435 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 393 [2022-12-13 16:25:10,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 394 transitions, 3661 flow. Second operand has 27 states, 27 states have (on average 135.07407407407408) internal successors, (3647), 27 states have internal predecessors, (3647), 0 states have call successors, (0), 0 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 16:25:10,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:25:10,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 393 [2022-12-13 16:25:10,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:25:16,687 INFO L130 PetriNetUnfolder]: 23298/30638 cut-off events. [2022-12-13 16:25:16,687 INFO L131 PetriNetUnfolder]: For 103111/103111 co-relation queries the response was YES. [2022-12-13 16:25:16,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130132 conditions, 30638 events. 23298/30638 cut-off events. For 103111/103111 co-relation queries the response was YES. Maximal size of possible extension queue 1116. Compared 156332 event pairs, 1651 based on Foata normal form. 4/30642 useless extension candidates. Maximal degree in co-relation 130079. Up to 21825 conditions per place. [2022-12-13 16:25:16,949 INFO L137 encePairwiseOnDemand]: 378/393 looper letters, 538 selfloop transitions, 450 changer transitions 43/1031 dead transitions. [2022-12-13 16:25:16,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 1031 transitions, 9801 flow [2022-12-13 16:25:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 16:25:16,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-13 16:25:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5541 transitions. [2022-12-13 16:25:16,960 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37103254319003615 [2022-12-13 16:25:16,960 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5541 transitions. [2022-12-13 16:25:16,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5541 transitions. [2022-12-13 16:25:16,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:25:16,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5541 transitions. [2022-12-13 16:25:16,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 145.81578947368422) internal successors, (5541), 38 states have internal predecessors, (5541), 0 states have call successors, (0), 0 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 16:25:16,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 393.0) internal successors, (15327), 39 states have internal predecessors, (15327), 0 states have call successors, (0), 0 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 16:25:16,987 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 393.0) internal successors, (15327), 39 states have internal predecessors, (15327), 0 states have call successors, (0), 0 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 16:25:16,987 INFO L175 Difference]: Start difference. First operand has 123 places, 394 transitions, 3661 flow. Second operand 38 states and 5541 transitions. [2022-12-13 16:25:16,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 1031 transitions, 9801 flow [2022-12-13 16:25:18,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 1031 transitions, 9090 flow, removed 352 selfloop flow, removed 2 redundant places. [2022-12-13 16:25:18,432 INFO L231 Difference]: Finished difference. Result has 171 places, 728 transitions, 7703 flow [2022-12-13 16:25:18,432 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=3052, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=7703, PETRI_PLACES=171, PETRI_TRANSITIONS=728} [2022-12-13 16:25:18,433 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 132 predicate places. [2022-12-13 16:25:18,433 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 728 transitions, 7703 flow [2022-12-13 16:25:18,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 135.07407407407408) internal successors, (3647), 27 states have internal predecessors, (3647), 0 states have call successors, (0), 0 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 16:25:18,433 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:25:18,433 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:25:18,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 16:25:18,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 16:25:18,635 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 2 more)] === [2022-12-13 16:25:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:25:18,636 INFO L85 PathProgramCache]: Analyzing trace with hash -947643191, now seen corresponding path program 3 times [2022-12-13 16:25:18,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:25:18,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741295041] [2022-12-13 16:25:18,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:25:18,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:25:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:25:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:25:19,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:25:19,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741295041] [2022-12-13 16:25:19,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741295041] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:25:19,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372115356] [2022-12-13 16:25:19,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:25:19,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:25:19,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:25:19,185 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:25:19,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:25:19,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 16:25:19,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:25:19,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 16:25:19,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:25:19,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:25:19,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:25:19,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-12-13 16:25:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:25:19,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:25:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 16:25:19,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372115356] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:25:19,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:25:19,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 20 [2022-12-13 16:25:19,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299454494] [2022-12-13 16:25:19,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:25:19,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 16:25:19,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:25:19,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 16:25:19,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-12-13 16:25:20,135 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 393 [2022-12-13 16:25:20,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 728 transitions, 7703 flow. Second operand has 21 states, 21 states have (on average 154.95238095238096) internal successors, (3254), 21 states have internal predecessors, (3254), 0 states have call successors, (0), 0 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 16:25:20,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:25:20,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 393 [2022-12-13 16:25:20,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:25:27,489 INFO L130 PetriNetUnfolder]: 29914/39352 cut-off events. [2022-12-13 16:25:27,489 INFO L131 PetriNetUnfolder]: For 156726/156726 co-relation queries the response was YES. [2022-12-13 16:25:27,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184506 conditions, 39352 events. 29914/39352 cut-off events. For 156726/156726 co-relation queries the response was YES. Maximal size of possible extension queue 1445. Compared 207191 event pairs, 2125 based on Foata normal form. 4/39356 useless extension candidates. Maximal degree in co-relation 184437. Up to 29594 conditions per place. [2022-12-13 16:25:27,792 INFO L137 encePairwiseOnDemand]: 378/393 looper letters, 742 selfloop transitions, 464 changer transitions 32/1238 dead transitions. [2022-12-13 16:25:27,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 1238 transitions, 13965 flow [2022-12-13 16:25:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 16:25:27,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 16:25:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 5605 transitions. [2022-12-13 16:25:27,798 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4194731327645562 [2022-12-13 16:25:27,798 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 5605 transitions. [2022-12-13 16:25:27,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 5605 transitions. [2022-12-13 16:25:27,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:25:27,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 5605 transitions. [2022-12-13 16:25:27,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 164.85294117647058) internal successors, (5605), 34 states have internal predecessors, (5605), 0 states have call successors, (0), 0 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 16:25:27,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 393.0) internal successors, (13755), 35 states have internal predecessors, (13755), 0 states have call successors, (0), 0 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 16:25:27,814 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 393.0) internal successors, (13755), 35 states have internal predecessors, (13755), 0 states have call successors, (0), 0 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 16:25:27,814 INFO L175 Difference]: Start difference. First operand has 171 places, 728 transitions, 7703 flow. Second operand 34 states and 5605 transitions. [2022-12-13 16:25:27,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 1238 transitions, 13965 flow [2022-12-13 16:25:31,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 1238 transitions, 12609 flow, removed 670 selfloop flow, removed 5 redundant places. [2022-12-13 16:25:31,244 INFO L231 Difference]: Finished difference. Result has 213 places, 974 transitions, 11041 flow [2022-12-13 16:25:31,244 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=11041, PETRI_PLACES=213, PETRI_TRANSITIONS=974} [2022-12-13 16:25:31,245 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 174 predicate places. [2022-12-13 16:25:31,245 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 974 transitions, 11041 flow [2022-12-13 16:25:31,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 154.95238095238096) internal successors, (3254), 21 states have internal predecessors, (3254), 0 states have call successors, (0), 0 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 16:25:31,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:25:31,245 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:25:31,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:25:31,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:25:31,448 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 2 more)] === [2022-12-13 16:25:31,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:25:31,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1270614425, now seen corresponding path program 4 times [2022-12-13 16:25:31,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:25:31,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133113139] [2022-12-13 16:25:31,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:25:31,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:25:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:25:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:25:32,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:25:32,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133113139] [2022-12-13 16:25:32,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133113139] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:25:32,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202372877] [2022-12-13 16:25:32,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 16:25:32,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:25:32,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:25:32,380 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:25:32,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:25:32,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 16:25:32,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:25:32,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-13 16:25:32,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:25:32,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:25:32,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 16:25:32,861 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-12-13 16:25:32,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-12-13 16:25:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:25:32,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:25:33,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-12-13 16:25:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:25:33,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202372877] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:25:33,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:25:33,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2022-12-13 16:25:33,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152245443] [2022-12-13 16:25:33,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:25:33,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 16:25:33,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:25:33,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 16:25:33,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=795, Unknown=1, NotChecked=0, Total=930 [2022-12-13 16:25:34,031 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 393 [2022-12-13 16:25:34,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 974 transitions, 11041 flow. Second operand has 31 states, 31 states have (on average 125.70967741935483) internal successors, (3897), 31 states have internal predecessors, (3897), 0 states have call successors, (0), 0 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 16:25:34,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:25:34,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 393 [2022-12-13 16:25:34,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:26:00,853 INFO L130 PetriNetUnfolder]: 94010/123864 cut-off events. [2022-12-13 16:26:00,853 INFO L131 PetriNetUnfolder]: For 563519/563519 co-relation queries the response was YES. [2022-12-13 16:26:01,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607464 conditions, 123864 events. 94010/123864 cut-off events. For 563519/563519 co-relation queries the response was YES. Maximal size of possible extension queue 3475. Compared 736217 event pairs, 8976 based on Foata normal form. 569/124433 useless extension candidates. Maximal degree in co-relation 605423. Up to 45070 conditions per place. [2022-12-13 16:26:02,240 INFO L137 encePairwiseOnDemand]: 380/393 looper letters, 2215 selfloop transitions, 1435 changer transitions 117/3767 dead transitions. [2022-12-13 16:26:02,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 3767 transitions, 45859 flow [2022-12-13 16:26:02,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-13 16:26:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-12-13 16:26:02,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 9420 transitions. [2022-12-13 16:26:02,249 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3524921418949259 [2022-12-13 16:26:02,249 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 9420 transitions. [2022-12-13 16:26:02,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 9420 transitions. [2022-12-13 16:26:02,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:26:02,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 9420 transitions. [2022-12-13 16:26:02,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 138.52941176470588) internal successors, (9420), 68 states have internal predecessors, (9420), 0 states have call successors, (0), 0 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 16:26:02,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 393.0) internal successors, (27117), 69 states have internal predecessors, (27117), 0 states have call successors, (0), 0 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 16:26:02,278 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 393.0) internal successors, (27117), 69 states have internal predecessors, (27117), 0 states have call successors, (0), 0 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 16:26:02,278 INFO L175 Difference]: Start difference. First operand has 213 places, 974 transitions, 11041 flow. Second operand 68 states and 9420 transitions. [2022-12-13 16:26:02,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 3767 transitions, 45859 flow [2022-12-13 16:26:29,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 3767 transitions, 43338 flow, removed 836 selfloop flow, removed 9 redundant places. [2022-12-13 16:26:29,466 INFO L231 Difference]: Finished difference. Result has 309 places, 2145 transitions, 29327 flow [2022-12-13 16:26:29,467 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=10235, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=29327, PETRI_PLACES=309, PETRI_TRANSITIONS=2145} [2022-12-13 16:26:29,467 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 270 predicate places. [2022-12-13 16:26:29,467 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 2145 transitions, 29327 flow [2022-12-13 16:26:29,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 125.70967741935483) internal successors, (3897), 31 states have internal predecessors, (3897), 0 states have call successors, (0), 0 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 16:26:29,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:26:29,468 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:26:29,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:26:29,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:29,670 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 2 more)] === [2022-12-13 16:26:29,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:26:29,671 INFO L85 PathProgramCache]: Analyzing trace with hash -35766203, now seen corresponding path program 5 times [2022-12-13 16:26:29,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:26:29,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312067937] [2022-12-13 16:26:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:26:29,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:26:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:26:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:26:30,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:26:30,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312067937] [2022-12-13 16:26:30,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312067937] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:26:30,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103554516] [2022-12-13 16:26:30,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 16:26:30,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:26:30,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:26:30,131 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:26:30,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:26:30,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:26:30,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:26:30,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 16:26:30,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:26:30,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:26:30,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2022-12-13 16:26:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:26:30,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:26:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:26:30,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103554516] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:26:30,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:26:30,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2022-12-13 16:26:30,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806096343] [2022-12-13 16:26:30,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:26:30,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 16:26:30,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:26:30,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 16:26:30,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-12-13 16:26:30,832 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 393 [2022-12-13 16:26:30,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 2145 transitions, 29327 flow. Second operand has 18 states, 18 states have (on average 160.22222222222223) internal successors, (2884), 18 states have internal predecessors, (2884), 0 states have call successors, (0), 0 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 16:26:30,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:26:30,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 393 [2022-12-13 16:26:30,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:27:18,461 INFO L130 PetriNetUnfolder]: 128799/169808 cut-off events. [2022-12-13 16:27:18,461 INFO L131 PetriNetUnfolder]: For 1140313/1140313 co-relation queries the response was YES. [2022-12-13 16:27:20,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 910978 conditions, 169808 events. 128799/169808 cut-off events. For 1140313/1140313 co-relation queries the response was YES. Maximal size of possible extension queue 4911. Compared 1045346 event pairs, 12735 based on Foata normal form. 16/169824 useless extension candidates. Maximal degree in co-relation 908339. Up to 118263 conditions per place. [2022-12-13 16:27:21,401 INFO L137 encePairwiseOnDemand]: 379/393 looper letters, 1834 selfloop transitions, 1411 changer transitions 13/3258 dead transitions. [2022-12-13 16:27:21,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 3258 transitions, 49417 flow [2022-12-13 16:27:21,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 16:27:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 16:27:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5131 transitions. [2022-12-13 16:27:21,406 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4351993214588634 [2022-12-13 16:27:21,407 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5131 transitions. [2022-12-13 16:27:21,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5131 transitions. [2022-12-13 16:27:21,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:27:21,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5131 transitions. [2022-12-13 16:27:21,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 171.03333333333333) internal successors, (5131), 30 states have internal predecessors, (5131), 0 states have call successors, (0), 0 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 16:27:21,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 393.0) internal successors, (12183), 31 states have internal predecessors, (12183), 0 states have call successors, (0), 0 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 16:27:21,420 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 393.0) internal successors, (12183), 31 states have internal predecessors, (12183), 0 states have call successors, (0), 0 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 16:27:21,420 INFO L175 Difference]: Start difference. First operand has 309 places, 2145 transitions, 29327 flow. Second operand 30 states and 5131 transitions. [2022-12-13 16:27:21,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 3258 transitions, 49417 flow [2022-12-13 16:28:21,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 3258 transitions, 46851 flow, removed 1270 selfloop flow, removed 8 redundant places. [2022-12-13 16:28:21,668 INFO L231 Difference]: Finished difference. Result has 346 places, 2960 transitions, 44044 flow [2022-12-13 16:28:21,669 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=27347, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=703, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=44044, PETRI_PLACES=346, PETRI_TRANSITIONS=2960} [2022-12-13 16:28:21,670 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 307 predicate places. [2022-12-13 16:28:21,670 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 2960 transitions, 44044 flow [2022-12-13 16:28:21,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 160.22222222222223) internal successors, (2884), 18 states have internal predecessors, (2884), 0 states have call successors, (0), 0 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 16:28:21,670 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:28:21,670 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:28:21,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 16:28:21,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 16:28:21,872 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 2 more)] === [2022-12-13 16:28:21,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:28:21,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1142336585, now seen corresponding path program 6 times [2022-12-13 16:28:21,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:28:21,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882540620] [2022-12-13 16:28:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:28:21,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:28:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:28:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:28:22,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:28:22,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882540620] [2022-12-13 16:28:22,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882540620] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:28:22,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826305986] [2022-12-13 16:28:22,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 16:28:22,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:28:22,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:28:22,204 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:28:22,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:28:22,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 16:28:22,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:28:22,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 16:28:22,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:28:22,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:28:22,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-12-13 16:28:22,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:28:22,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:28:22,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 14 [2022-12-13 16:28:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:28:22,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:28:22,781 INFO L321 Elim1Store]: treesize reduction 10, result has 28.6 percent of original size [2022-12-13 16:28:22,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 35 [2022-12-13 16:28:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:28:22,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826305986] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:28:22,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:28:22,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2022-12-13 16:28:22,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120863637] [2022-12-13 16:28:22,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:28:22,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 16:28:22,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:28:22,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 16:28:22,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=572, Unknown=3, NotChecked=0, Total=702 [2022-12-13 16:28:23,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 393 [2022-12-13 16:28:23,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 2960 transitions, 44044 flow. Second operand has 27 states, 27 states have (on average 135.07407407407408) internal successors, (3647), 27 states have internal predecessors, (3647), 0 states have call successors, (0), 0 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 16:28:23,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:28:23,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 393 [2022-12-13 16:28:23,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:29:41,478 INFO L130 PetriNetUnfolder]: 162966/214981 cut-off events. [2022-12-13 16:29:41,478 INFO L131 PetriNetUnfolder]: For 1730948/1730948 co-relation queries the response was YES. [2022-12-13 16:29:44,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1245474 conditions, 214981 events. 162966/214981 cut-off events. For 1730948/1730948 co-relation queries the response was YES. Maximal size of possible extension queue 5798. Compared 1359529 event pairs, 17687 based on Foata normal form. 12/214993 useless extension candidates. Maximal degree in co-relation 1242840. Up to 166342 conditions per place. [2022-12-13 16:29:45,583 INFO L137 encePairwiseOnDemand]: 379/393 looper letters, 2212 selfloop transitions, 2106 changer transitions 24/4342 dead transitions. [2022-12-13 16:29:45,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 4342 transitions, 71812 flow [2022-12-13 16:29:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 16:29:45,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 16:29:45,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5189 transitions. [2022-12-13 16:29:45,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3772446383133406 [2022-12-13 16:29:45,593 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5189 transitions. [2022-12-13 16:29:45,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5189 transitions. [2022-12-13 16:29:45,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:29:45,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5189 transitions. [2022-12-13 16:29:45,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 148.25714285714287) internal successors, (5189), 35 states have internal predecessors, (5189), 0 states have call successors, (0), 0 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 16:29:45,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 393.0) internal successors, (14148), 36 states have internal predecessors, (14148), 0 states have call successors, (0), 0 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 16:29:45,617 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 393.0) internal successors, (14148), 36 states have internal predecessors, (14148), 0 states have call successors, (0), 0 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 16:29:45,618 INFO L175 Difference]: Start difference. First operand has 346 places, 2960 transitions, 44044 flow. Second operand 35 states and 5189 transitions. [2022-12-13 16:29:45,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 4342 transitions, 71812 flow [2022-12-13 16:32:51,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 4342 transitions, 67114 flow, removed 2341 selfloop flow, removed 3 redundant places. [2022-12-13 16:32:51,790 INFO L231 Difference]: Finished difference. Result has 396 places, 3976 transitions, 63598 flow [2022-12-13 16:32:51,793 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=40780, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2960, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=63598, PETRI_PLACES=396, PETRI_TRANSITIONS=3976} [2022-12-13 16:32:51,794 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 357 predicate places. [2022-12-13 16:32:51,794 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 3976 transitions, 63598 flow [2022-12-13 16:32:51,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 135.07407407407408) internal successors, (3647), 27 states have internal predecessors, (3647), 0 states have call successors, (0), 0 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 16:32:51,795 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:32:51,795 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:32:51,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 16:32:51,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:51,996 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 2 more)] === [2022-12-13 16:32:51,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:32:51,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1015590928, now seen corresponding path program 2 times [2022-12-13 16:32:51,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:32:51,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365508301] [2022-12-13 16:32:51,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:32:51,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:32:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:32:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:52,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:32:52,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365508301] [2022-12-13 16:32:52,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365508301] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:32:52,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570903275] [2022-12-13 16:32:52,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:32:52,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:32:52,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:32:52,685 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:32:52,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:32:52,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:32:52,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:32:52,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-13 16:32:52,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:32:53,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:32:53,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 16:32:53,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 16:32:53,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:32:53,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-12-13 16:32:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:53,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:32:53,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2022-12-13 16:32:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:32:53,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570903275] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:32:53,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:32:53,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2022-12-13 16:32:53,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096853683] [2022-12-13 16:32:53,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:32:53,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 16:32:53,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:32:53,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 16:32:53,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=632, Unknown=1, NotChecked=0, Total=756 [2022-12-13 16:32:54,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 393 [2022-12-13 16:32:54,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 3976 transitions, 63598 flow. Second operand has 28 states, 28 states have (on average 135.0) internal successors, (3780), 28 states have internal predecessors, (3780), 0 states have call successors, (0), 0 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 16:32:54,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:32:54,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 393 [2022-12-13 16:32:54,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:34:43,310 INFO L130 PetriNetUnfolder]: 174225/230008 cut-off events. [2022-12-13 16:34:43,310 INFO L131 PetriNetUnfolder]: For 1861902/1861902 co-relation queries the response was YES. [2022-12-13 16:34:47,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1357881 conditions, 230008 events. 174225/230008 cut-off events. For 1861902/1861902 co-relation queries the response was YES. Maximal size of possible extension queue 6643. Compared 1474487 event pairs, 29830 based on Foata normal form. 347/230355 useless extension candidates. Maximal degree in co-relation 1352225. Up to 146493 conditions per place. [2022-12-13 16:34:48,497 INFO L137 encePairwiseOnDemand]: 379/393 looper letters, 4330 selfloop transitions, 812 changer transitions 103/5245 dead transitions. [2022-12-13 16:34:48,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 5245 transitions, 86913 flow [2022-12-13 16:34:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 16:34:48,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-12-13 16:34:48,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 6910 transitions. [2022-12-13 16:34:48,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3740999404471875 [2022-12-13 16:34:48,504 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 6910 transitions. [2022-12-13 16:34:48,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 6910 transitions. [2022-12-13 16:34:48,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:34:48,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 6910 transitions. [2022-12-13 16:34:48,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 147.0212765957447) internal successors, (6910), 47 states have internal predecessors, (6910), 0 states have call successors, (0), 0 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 16:34:48,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 393.0) internal successors, (18864), 48 states have internal predecessors, (18864), 0 states have call successors, (0), 0 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 16:34:48,536 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 393.0) internal successors, (18864), 48 states have internal predecessors, (18864), 0 states have call successors, (0), 0 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 16:34:48,536 INFO L175 Difference]: Start difference. First operand has 396 places, 3976 transitions, 63598 flow. Second operand 47 states and 6910 transitions. [2022-12-13 16:34:48,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 5245 transitions, 86913 flow [2022-12-13 16:37:19,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 5245 transitions, 81374 flow, removed 2767 selfloop flow, removed 3 redundant places. [2022-12-13 16:37:19,342 INFO L231 Difference]: Finished difference. Result has 464 places, 4301 transitions, 66539 flow [2022-12-13 16:37:19,344 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=393, PETRI_DIFFERENCE_MINUEND_FLOW=57599, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=66539, PETRI_PLACES=464, PETRI_TRANSITIONS=4301} [2022-12-13 16:37:19,344 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, 425 predicate places. [2022-12-13 16:37:19,344 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 4301 transitions, 66539 flow [2022-12-13 16:37:19,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 135.0) internal successors, (3780), 28 states have internal predecessors, (3780), 0 states have call successors, (0), 0 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 16:37:19,345 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:37:19,345 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:37:19,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 16:37:19,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 16:37:19,546 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 2 more)] === [2022-12-13 16:37:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:37:19,547 INFO L85 PathProgramCache]: Analyzing trace with hash 733431143, now seen corresponding path program 7 times [2022-12-13 16:37:19,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:37:19,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273090737] [2022-12-13 16:37:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:37:19,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:37:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 16:37:19,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:37:19,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273090737] [2022-12-13 16:37:19,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273090737] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:37:19,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243396494] [2022-12-13 16:37:19,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 16:37:19,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:37:19,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:37:19,907 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:37:19,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3949d5de-1091-4992-b3d9-1da87cf61014/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:37:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:37:20,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 16:37:20,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:37:20,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 16:37:20,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 16:37:20,311 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 16:37:20,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-12-13 16:37:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:20,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:37:20,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2022-12-13 16:37:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:37:20,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243396494] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:37:20,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:37:20,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2022-12-13 16:37:20,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585500077] [2022-12-13 16:37:20,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:37:20,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 16:37:20,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:37:20,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 16:37:20,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=542, Unknown=3, NotChecked=0, Total=650 [2022-12-13 16:37:21,547 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 393 [2022-12-13 16:37:21,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 4301 transitions, 66539 flow. Second operand has 26 states, 26 states have (on average 135.19230769230768) internal successors, (3515), 26 states have internal predecessors, (3515), 0 states have call successors, (0), 0 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 16:37:21,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:37:21,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 393 [2022-12-13 16:37:21,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand