./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/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_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/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_e35ca1b1-1c45-456b-985f-2e1cb8595205/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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- 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 14:12:29,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:12:29,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:12:29,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:12:29,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:12:29,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:12:29,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:12:29,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:12:29,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:12:29,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:12:29,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:12:29,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:12:29,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:12:29,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:12:29,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:12:29,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:12:29,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:12:29,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:12:29,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:12:29,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:12:29,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:12:29,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:12:29,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:12:29,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:12:29,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:12:29,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:12:29,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:12:29,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:12:29,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:12:29,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:12:29,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:12:29,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:12:29,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:12:29,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:12:29,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:12:29,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:12:29,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:12:29,215 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:12:29,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:12:29,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:12:29,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:12:29,217 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 14:12:29,231 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:12:29,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:12:29,231 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:12:29,231 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:12:29,232 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:12:29,232 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:12:29,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:12:29,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:12:29,232 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:12:29,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:12:29,233 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:12:29,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:12:29,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:12:29,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:12:29,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 14:12:29,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:12:29,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 14:12:29,234 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:12:29,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 14:12:29,234 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:12:29,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 14:12:29,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:12:29,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:12:29,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:12:29,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:12:29,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:12:29,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:12:29,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 14:12:29,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:12:29,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:12:29,235 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:12:29,235 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 14:12:29,236 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:12:29,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:12:29,236 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:12:29,236 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_e35ca1b1-1c45-456b-985f-2e1cb8595205/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2022-12-13 14:12:29,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:12:29,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:12:29,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:12:29,429 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:12:29,430 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:12:29,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-12-13 14:12:31,970 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:12:32,112 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:12:32,112 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-12-13 14:12:32,117 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/data/a6c137885/b616ef396b2046099e061ca50608290d/FLAG2f8c40a5e [2022-12-13 14:12:32,127 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/data/a6c137885/b616ef396b2046099e061ca50608290d [2022-12-13 14:12:32,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:12:32,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:12:32,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:12:32,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:12:32,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:12:32,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:12:32" (1/1) ... [2022-12-13 14:12:32,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d852926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:12:32, skipping insertion in model container [2022-12-13 14:12:32,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:12:32" (1/1) ... [2022-12-13 14:12:32,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:12:32,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:12:32,266 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:12:32,266 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:12:32,269 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:12:32,270 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:12:32,274 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_e35ca1b1-1c45-456b-985f-2e1cb8595205/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-12-13 14:12:32,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:12:32,285 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:12:32,294 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:12:32,294 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:12:32,295 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 14:12:32,296 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 14:12:32,298 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_e35ca1b1-1c45-456b-985f-2e1cb8595205/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-12-13 14:12:32,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:12:32,309 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:12:32,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:12:32 WrapperNode [2022-12-13 14:12:32,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:12:32,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:12:32,310 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:12:32,310 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:12:32,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:12:32" (1/1) ... [2022-12-13 14:12:32,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:12:32" (1/1) ... [2022-12-13 14:12:32,336 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-12-13 14:12:32,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:12:32,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:12:32,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:12:32,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:12:32,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:12:32" (1/1) ... [2022-12-13 14:12:32,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:12:32" (1/1) ... [2022-12-13 14:12:32,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:12:32" (1/1) ... [2022-12-13 14:12:32,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:12:32" (1/1) ... [2022-12-13 14:12:32,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:12:32" (1/1) ... [2022-12-13 14:12:32,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:12:32" (1/1) ... [2022-12-13 14:12:32,355 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:12:32" (1/1) ... [2022-12-13 14:12:32,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:12:32" (1/1) ... [2022-12-13 14:12:32,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:12:32,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:12:32,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:12:32,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:12:32,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:12:32" (1/1) ... [2022-12-13 14:12:32,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:12:32,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:32,388 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:12:32,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:12:32,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:12:32,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 14:12:32,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 14:12:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 14:12:32,424 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 14:12:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:12:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:12:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:12:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 14:12:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 14:12:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:12:32,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:12:32,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:12:32,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:12:32,426 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 14:12:32,503 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:12:32,505 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:12:32,642 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:12:32,674 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:12:32,674 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 14:12:32,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:12:32 BoogieIcfgContainer [2022-12-13 14:12:32,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:12:32,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:12:32,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:12:32,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:12:32,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:12:32" (1/3) ... [2022-12-13 14:12:32,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa680d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:12:32, skipping insertion in model container [2022-12-13 14:12:32,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:12:32" (2/3) ... [2022-12-13 14:12:32,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa680d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:12:32, skipping insertion in model container [2022-12-13 14:12:32,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:12:32" (3/3) ... [2022-12-13 14:12:32,686 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-12-13 14:12:32,695 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 14:12:32,702 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:12:32,703 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 14:12:32,703 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:12:32,752 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 14:12:32,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2022-12-13 14:12:32,817 INFO L130 PetriNetUnfolder]: 6/80 cut-off events. [2022-12-13 14:12:32,817 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:12:32,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-12-13 14:12:32,822 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2022-12-13 14:12:32,826 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-12-13 14:12:32,829 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:12:32,840 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 71 transitions, 154 flow [2022-12-13 14:12:32,843 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 71 transitions, 154 flow [2022-12-13 14:12:32,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 154 flow [2022-12-13 14:12:32,866 INFO L130 PetriNetUnfolder]: 6/71 cut-off events. [2022-12-13 14:12:32,866 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:12:32,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 6/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-12-13 14:12:32,867 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2022-12-13 14:12:34,406 INFO L134 LiptonReduction]: Checked pairs total: 419 [2022-12-13 14:12:34,407 INFO L136 LiptonReduction]: Total number of compositions: 67 [2022-12-13 14:12:34,418 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:12:34,422 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;@77a43a3c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:12:34,422 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 14:12:34,425 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-13 14:12:34,425 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:12:34,425 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:34,426 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:34,426 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:34,430 INFO L85 PathProgramCache]: Analyzing trace with hash -343983049, now seen corresponding path program 1 times [2022-12-13 14:12:34,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:34,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273912062] [2022-12-13 14:12:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:34,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:34,674 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 14:12:34,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:34,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273912062] [2022-12-13 14:12:34,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273912062] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:12:34,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:12:34,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:12:34,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252183345] [2022-12-13 14:12:34,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:12:34,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:12:34,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:34,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:12:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:12:34,723 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 149 [2022-12-13 14:12:34,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 14:12:34,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:34,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 149 [2022-12-13 14:12:34,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:34,773 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2022-12-13 14:12:34,774 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 14:12:34,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 261 event pairs, 23 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2022-12-13 14:12:34,775 INFO L137 encePairwiseOnDemand]: 145/149 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2022-12-13 14:12:34,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2022-12-13 14:12:34,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:12:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:12:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 289 transitions. [2022-12-13 14:12:34,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4848993288590604 [2022-12-13 14:12:34,786 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 289 transitions. [2022-12-13 14:12:34,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 289 transitions. [2022-12-13 14:12:34,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:34,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 289 transitions. [2022-12-13 14:12:34,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 14:12:34,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 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 14:12:34,795 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 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 14:12:34,796 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 289 transitions. [2022-12-13 14:12:34,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2022-12-13 14:12:34,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 14:12:34,799 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2022-12-13 14:12:34,800 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2022-12-13 14:12:34,803 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2022-12-13 14:12:34,803 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2022-12-13 14:12:34,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 14:12:34,804 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:34,804 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:34,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:12:34,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:34,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:34,804 INFO L85 PathProgramCache]: Analyzing trace with hash -708982432, now seen corresponding path program 1 times [2022-12-13 14:12:34,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:34,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040491804] [2022-12-13 14:12:34,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:34,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:34,882 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 14:12:34,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040491804] [2022-12-13 14:12:34,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040491804] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:12:34,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:12:34,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:12:34,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979659446] [2022-12-13 14:12:34,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:12:34,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:12:34,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:34,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:12:34,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:12:34,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 149 [2022-12-13 14:12:34,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 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 14:12:34,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:34,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 149 [2022-12-13 14:12:34,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:35,003 INFO L130 PetriNetUnfolder]: 86/161 cut-off events. [2022-12-13 14:12:35,003 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-12-13 14:12:35,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 161 events. 86/161 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 489 event pairs, 33 based on Foata normal form. 4/131 useless extension candidates. Maximal degree in co-relation 89. Up to 93 conditions per place. [2022-12-13 14:12:35,004 INFO L137 encePairwiseOnDemand]: 144/149 looper letters, 30 selfloop transitions, 3 changer transitions 6/39 dead transitions. [2022-12-13 14:12:35,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 39 transitions, 197 flow [2022-12-13 14:12:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:12:35,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:12:35,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 357 transitions. [2022-12-13 14:12:35,006 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4791946308724832 [2022-12-13 14:12:35,007 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 357 transitions. [2022-12-13 14:12:35,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 357 transitions. [2022-12-13 14:12:35,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:35,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 357 transitions. [2022-12-13 14:12:35,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 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 14:12:35,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 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 14:12:35,013 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 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 14:12:35,014 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 5 states and 357 transitions. [2022-12-13 14:12:35,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 39 transitions, 197 flow [2022-12-13 14:12:35,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 183 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 14:12:35,015 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 64 flow [2022-12-13 14:12:35,016 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2022-12-13 14:12:35,016 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2022-12-13 14:12:35,016 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 64 flow [2022-12-13 14:12:35,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 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 14:12:35,017 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:35,017 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:35,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 14:12:35,017 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:35,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1133764510, now seen corresponding path program 2 times [2022-12-13 14:12:35,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:35,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543802301] [2022-12-13 14:12:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:35,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:35,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:35,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543802301] [2022-12-13 14:12:35,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543802301] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:35,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517992782] [2022-12-13 14:12:35,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:12:35,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:35,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:35,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:12:35,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:12:35,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 14:12:35,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:12:35,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 14:12:35,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:12:35,258 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 14:12:35,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:12:35,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517992782] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:12:35,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:12:35,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-13 14:12:35,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745293362] [2022-12-13 14:12:35,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:12:35,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:12:35,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:35,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:12:35,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:12:35,276 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 149 [2022-12-13 14:12:35,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 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 14:12:35,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:35,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 149 [2022-12-13 14:12:35,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:35,321 INFO L130 PetriNetUnfolder]: 51/94 cut-off events. [2022-12-13 14:12:35,321 INFO L131 PetriNetUnfolder]: For 52/60 co-relation queries the response was YES. [2022-12-13 14:12:35,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 94 events. 51/94 cut-off events. For 52/60 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 223 event pairs, 24 based on Foata normal form. 17/93 useless extension candidates. Maximal degree in co-relation 133. Up to 73 conditions per place. [2022-12-13 14:12:35,322 INFO L137 encePairwiseOnDemand]: 145/149 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2022-12-13 14:12:35,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 121 flow [2022-12-13 14:12:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:12:35,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:12:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 285 transitions. [2022-12-13 14:12:35,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47818791946308725 [2022-12-13 14:12:35,324 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 285 transitions. [2022-12-13 14:12:35,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 285 transitions. [2022-12-13 14:12:35,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:35,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 285 transitions. [2022-12-13 14:12:35,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 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 14:12:35,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 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 14:12:35,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 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 14:12:35,328 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 64 flow. Second operand 4 states and 285 transitions. [2022-12-13 14:12:35,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 121 flow [2022-12-13 14:12:35,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 14:12:35,329 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2022-12-13 14:12:35,329 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2022-12-13 14:12:35,330 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2022-12-13 14:12:35,330 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2022-12-13 14:12:35,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 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 14:12:35,331 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:35,331 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:35,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:12:35,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:35,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:35,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:35,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1788262144, now seen corresponding path program 1 times [2022-12-13 14:12:35,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:35,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414955273] [2022-12-13 14:12:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:35,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:35,737 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 14:12:35,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:35,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414955273] [2022-12-13 14:12:35,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414955273] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:35,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656159882] [2022-12-13 14:12:35,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:35,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:35,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:35,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:12:35,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:12:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:35,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 14:12:35,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:12:35,825 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 14:12:35,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:12:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:35,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656159882] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:35,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:12:35,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2, 2] total 4 [2022-12-13 14:12:35,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705714783] [2022-12-13 14:12:35,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:12:35,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:12:35,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:35,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:12:35,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:12:35,976 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 149 [2022-12-13 14:12:35,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 72.6) internal successors, (363), 5 states have internal predecessors, (363), 0 states have call successors, (0), 0 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 14:12:35,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:35,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 149 [2022-12-13 14:12:35,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:36,054 INFO L130 PetriNetUnfolder]: 84/156 cut-off events. [2022-12-13 14:12:36,054 INFO L131 PetriNetUnfolder]: For 27/45 co-relation queries the response was YES. [2022-12-13 14:12:36,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 156 events. 84/156 cut-off events. For 27/45 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 474 event pairs, 6 based on Foata normal form. 19/133 useless extension candidates. Maximal degree in co-relation 147. Up to 61 conditions per place. [2022-12-13 14:12:36,055 INFO L137 encePairwiseOnDemand]: 145/149 looper letters, 28 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2022-12-13 14:12:36,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 200 flow [2022-12-13 14:12:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:12:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:12:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 315 transitions. [2022-12-13 14:12:36,057 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5285234899328859 [2022-12-13 14:12:36,057 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 315 transitions. [2022-12-13 14:12:36,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 315 transitions. [2022-12-13 14:12:36,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:36,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 315 transitions. [2022-12-13 14:12:36,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:12:36,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 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 14:12:36,061 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 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 14:12:36,062 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 4 states and 315 transitions. [2022-12-13 14:12:36,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 200 flow [2022-12-13 14:12:36,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 194 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 14:12:36,063 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2022-12-13 14:12:36,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2022-12-13 14:12:36,064 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2022-12-13 14:12:36,064 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2022-12-13 14:12:36,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.6) internal successors, (363), 5 states have internal predecessors, (363), 0 states have call successors, (0), 0 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 14:12:36,064 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:36,065 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:36,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 14:12:36,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:36,266 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:36,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:36,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2136111370, now seen corresponding path program 2 times [2022-12-13 14:12:36,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:36,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661994019] [2022-12-13 14:12:36,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:36,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:36,368 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 14:12:36,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:36,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661994019] [2022-12-13 14:12:36,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661994019] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:36,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948272166] [2022-12-13 14:12:36,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:12:36,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:36,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:36,371 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:12:36,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:12:36,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:12:36,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:12:36,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:12:36,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:12:36,477 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 14:12:36,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:12:36,570 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 14:12:36,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948272166] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:12:36,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:12:36,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-12-13 14:12:36,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281176108] [2022-12-13 14:12:36,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:12:36,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 14:12:36,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:36,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 14:12:36,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-12-13 14:12:36,623 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 149 [2022-12-13 14:12:36,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 11 states, 11 states have (on average 67.72727272727273) internal successors, (745), 11 states have internal predecessors, (745), 0 states have call successors, (0), 0 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 14:12:36,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:36,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 149 [2022-12-13 14:12:36,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:36,734 INFO L130 PetriNetUnfolder]: 132/239 cut-off events. [2022-12-13 14:12:36,734 INFO L131 PetriNetUnfolder]: For 222/234 co-relation queries the response was YES. [2022-12-13 14:12:36,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 239 events. 132/239 cut-off events. For 222/234 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 756 event pairs, 32 based on Foata normal form. 26/264 useless extension candidates. Maximal degree in co-relation 232. Up to 190 conditions per place. [2022-12-13 14:12:36,736 INFO L137 encePairwiseOnDemand]: 144/149 looper letters, 30 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2022-12-13 14:12:36,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 39 transitions, 247 flow [2022-12-13 14:12:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:12:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:12:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 355 transitions. [2022-12-13 14:12:36,738 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47651006711409394 [2022-12-13 14:12:36,738 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 355 transitions. [2022-12-13 14:12:36,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 355 transitions. [2022-12-13 14:12:36,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:36,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 355 transitions. [2022-12-13 14:12:36,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 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 14:12:36,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 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 14:12:36,742 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 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 14:12:36,742 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 5 states and 355 transitions. [2022-12-13 14:12:36,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 39 transitions, 247 flow [2022-12-13 14:12:36,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 39 transitions, 247 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 14:12:36,744 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 168 flow [2022-12-13 14:12:36,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2022-12-13 14:12:36,745 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2022-12-13 14:12:36,745 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 168 flow [2022-12-13 14:12:36,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 67.72727272727273) internal successors, (745), 11 states have internal predecessors, (745), 0 states have call successors, (0), 0 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 14:12:36,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:36,746 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:36,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:12:36,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:36,946 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:36,947 INFO L85 PathProgramCache]: Analyzing trace with hash -609129726, now seen corresponding path program 3 times [2022-12-13 14:12:36,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:36,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189098449] [2022-12-13 14:12:36,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:36,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:37,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:37,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189098449] [2022-12-13 14:12:37,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189098449] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:37,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731392738] [2022-12-13 14:12:37,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:12:37,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:37,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:37,051 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:12:37,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:12:37,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 14:12:37,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:12:37,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:12:37,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:12:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:37,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:12:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:37,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731392738] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:12:37,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:12:37,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 14:12:37,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007148536] [2022-12-13 14:12:37,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:12:37,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:12:37,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:37,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:12:37,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:12:37,345 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:12:37,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 168 flow. Second operand has 16 states, 16 states have (on average 63.4375) internal successors, (1015), 16 states have internal predecessors, (1015), 0 states have call successors, (0), 0 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 14:12:37,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:37,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:12:37,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:37,715 INFO L130 PetriNetUnfolder]: 216/388 cut-off events. [2022-12-13 14:12:37,715 INFO L131 PetriNetUnfolder]: For 595/595 co-relation queries the response was YES. [2022-12-13 14:12:37,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 388 events. 216/388 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1467 event pairs, 4 based on Foata normal form. 12/400 useless extension candidates. Maximal degree in co-relation 775. Up to 135 conditions per place. [2022-12-13 14:12:37,717 INFO L137 encePairwiseOnDemand]: 142/149 looper letters, 64 selfloop transitions, 29 changer transitions 10/103 dead transitions. [2022-12-13 14:12:37,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 103 transitions, 687 flow [2022-12-13 14:12:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 14:12:37,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 14:12:37,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1073 transitions. [2022-12-13 14:12:37,720 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4500838926174497 [2022-12-13 14:12:37,720 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1073 transitions. [2022-12-13 14:12:37,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1073 transitions. [2022-12-13 14:12:37,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:37,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1073 transitions. [2022-12-13 14:12:37,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 67.0625) internal successors, (1073), 16 states have internal predecessors, (1073), 0 states have call successors, (0), 0 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 14:12:37,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 149.0) internal successors, (2533), 17 states have internal predecessors, (2533), 0 states have call successors, (0), 0 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 14:12:37,724 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 149.0) internal successors, (2533), 17 states have internal predecessors, (2533), 0 states have call successors, (0), 0 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 14:12:37,724 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 168 flow. Second operand 16 states and 1073 transitions. [2022-12-13 14:12:37,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 103 transitions, 687 flow [2022-12-13 14:12:37,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 103 transitions, 677 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 14:12:37,727 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 380 flow [2022-12-13 14:12:37,727 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=380, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2022-12-13 14:12:37,728 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2022-12-13 14:12:37,728 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 380 flow [2022-12-13 14:12:37,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.4375) internal successors, (1015), 16 states have internal predecessors, (1015), 0 states have call successors, (0), 0 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 14:12:37,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:37,728 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:37,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 14:12:37,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:37,929 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:37,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:37,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1445518042, now seen corresponding path program 4 times [2022-12-13 14:12:37,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:37,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361446065] [2022-12-13 14:12:37,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:37,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:38,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:38,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361446065] [2022-12-13 14:12:38,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361446065] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:38,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898707025] [2022-12-13 14:12:38,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:12:38,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:38,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:38,028 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:12:38,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:12:38,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:12:38,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:12:38,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:12:38,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:12:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:38,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:12:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:38,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898707025] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:12:38,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:12:38,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 14:12:38,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313866599] [2022-12-13 14:12:38,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:12:38,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 14:12:38,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:38,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 14:12:38,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-12-13 14:12:38,288 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:12:38,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 380 flow. Second operand has 15 states, 15 states have (on average 63.4) internal successors, (951), 15 states have internal predecessors, (951), 0 states have call successors, (0), 0 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 14:12:38,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:38,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:12:38,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:38,630 INFO L130 PetriNetUnfolder]: 297/535 cut-off events. [2022-12-13 14:12:38,630 INFO L131 PetriNetUnfolder]: For 2550/2550 co-relation queries the response was YES. [2022-12-13 14:12:38,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2580 conditions, 535 events. 297/535 cut-off events. For 2550/2550 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2209 event pairs, 21 based on Foata normal form. 38/573 useless extension candidates. Maximal degree in co-relation 1688. Up to 290 conditions per place. [2022-12-13 14:12:38,636 INFO L137 encePairwiseOnDemand]: 142/149 looper letters, 78 selfloop transitions, 40 changer transitions 1/119 dead transitions. [2022-12-13 14:12:38,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 119 transitions, 1099 flow [2022-12-13 14:12:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 14:12:38,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-13 14:12:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1128 transitions. [2022-12-13 14:12:38,638 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4453217528622187 [2022-12-13 14:12:38,639 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1128 transitions. [2022-12-13 14:12:38,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1128 transitions. [2022-12-13 14:12:38,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:38,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1128 transitions. [2022-12-13 14:12:38,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 66.3529411764706) internal successors, (1128), 17 states have internal predecessors, (1128), 0 states have call successors, (0), 0 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 14:12:38,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 149.0) internal successors, (2682), 18 states have internal predecessors, (2682), 0 states have call successors, (0), 0 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 14:12:38,643 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 149.0) internal successors, (2682), 18 states have internal predecessors, (2682), 0 states have call successors, (0), 0 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 14:12:38,643 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 380 flow. Second operand 17 states and 1128 transitions. [2022-12-13 14:12:38,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 119 transitions, 1099 flow [2022-12-13 14:12:38,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 119 transitions, 994 flow, removed 41 selfloop flow, removed 5 redundant places. [2022-12-13 14:12:38,650 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 683 flow [2022-12-13 14:12:38,650 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=683, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2022-12-13 14:12:38,650 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 50 predicate places. [2022-12-13 14:12:38,650 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 683 flow [2022-12-13 14:12:38,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 63.4) internal successors, (951), 15 states have internal predecessors, (951), 0 states have call successors, (0), 0 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 14:12:38,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:38,651 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:38,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 14:12:38,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:38,851 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:38,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:38,852 INFO L85 PathProgramCache]: Analyzing trace with hash -252053387, now seen corresponding path program 5 times [2022-12-13 14:12:38,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:38,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456984074] [2022-12-13 14:12:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:38,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:38,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:38,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456984074] [2022-12-13 14:12:38,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456984074] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:38,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710972824] [2022-12-13 14:12:38,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:12:38,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:38,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:38,945 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:12:38,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 14:12:38,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:12:38,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:12:38,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:12:38,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:12:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:39,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:12:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:39,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710972824] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:12:39,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:12:39,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 7 [2022-12-13 14:12:39,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371414432] [2022-12-13 14:12:39,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:12:39,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:12:39,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:39,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:12:39,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:12:39,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 149 [2022-12-13 14:12:39,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 683 flow. Second operand has 9 states, 9 states have (on average 73.0) internal successors, (657), 9 states have internal predecessors, (657), 0 states have call successors, (0), 0 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 14:12:39,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:39,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 149 [2022-12-13 14:12:39,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:39,405 INFO L130 PetriNetUnfolder]: 395/719 cut-off events. [2022-12-13 14:12:39,405 INFO L131 PetriNetUnfolder]: For 5886/5913 co-relation queries the response was YES. [2022-12-13 14:12:39,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4151 conditions, 719 events. 395/719 cut-off events. For 5886/5913 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3393 event pairs, 44 based on Foata normal form. 16/726 useless extension candidates. Maximal degree in co-relation 3028. Up to 352 conditions per place. [2022-12-13 14:12:39,412 INFO L137 encePairwiseOnDemand]: 145/149 looper letters, 71 selfloop transitions, 32 changer transitions 7/117 dead transitions. [2022-12-13 14:12:39,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 117 transitions, 1313 flow [2022-12-13 14:12:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:12:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 14:12:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 396 transitions. [2022-12-13 14:12:39,414 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5315436241610738 [2022-12-13 14:12:39,414 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 396 transitions. [2022-12-13 14:12:39,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 396 transitions. [2022-12-13 14:12:39,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:39,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 396 transitions. [2022-12-13 14:12:39,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 79.2) internal successors, (396), 5 states have internal predecessors, (396), 0 states have call successors, (0), 0 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 14:12:39,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 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 14:12:39,417 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 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 14:12:39,417 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 683 flow. Second operand 5 states and 396 transitions. [2022-12-13 14:12:39,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 117 transitions, 1313 flow [2022-12-13 14:12:39,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 117 transitions, 1160 flow, removed 72 selfloop flow, removed 3 redundant places. [2022-12-13 14:12:39,434 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 908 flow [2022-12-13 14:12:39,434 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=908, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2022-12-13 14:12:39,434 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2022-12-13 14:12:39,434 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 908 flow [2022-12-13 14:12:39,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 73.0) internal successors, (657), 9 states have internal predecessors, (657), 0 states have call successors, (0), 0 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 14:12:39,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:39,435 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:39,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 14:12:39,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 14:12:39,636 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:39,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:39,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1902604138, now seen corresponding path program 6 times [2022-12-13 14:12:39,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:39,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641208515] [2022-12-13 14:12:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:39,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:39,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:39,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641208515] [2022-12-13 14:12:39,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641208515] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:39,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461438275] [2022-12-13 14:12:39,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:12:39,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:39,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:39,713 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:12:39,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 14:12:39,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 14:12:39,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:12:39,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 14:12:39,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:12:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:39,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:12:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:39,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461438275] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:12:39,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:12:39,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 14:12:39,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879069527] [2022-12-13 14:12:39,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:12:39,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:12:39,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:39,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:12:39,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:12:39,968 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:12:39,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 908 flow. Second operand has 16 states, 16 states have (on average 63.1875) internal successors, (1011), 16 states have internal predecessors, (1011), 0 states have call successors, (0), 0 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 14:12:39,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:39,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:12:39,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:40,543 INFO L130 PetriNetUnfolder]: 687/1287 cut-off events. [2022-12-13 14:12:40,543 INFO L131 PetriNetUnfolder]: For 13139/13139 co-relation queries the response was YES. [2022-12-13 14:12:40,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7926 conditions, 1287 events. 687/1287 cut-off events. For 13139/13139 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7170 event pairs, 10 based on Foata normal form. 24/1311 useless extension candidates. Maximal degree in co-relation 5227. Up to 385 conditions per place. [2022-12-13 14:12:40,551 INFO L137 encePairwiseOnDemand]: 141/149 looper letters, 106 selfloop transitions, 137 changer transitions 16/259 dead transitions. [2022-12-13 14:12:40,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 259 transitions, 3265 flow [2022-12-13 14:12:40,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 14:12:40,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 14:12:40,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1650 transitions. [2022-12-13 14:12:40,553 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4429530201342282 [2022-12-13 14:12:40,553 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1650 transitions. [2022-12-13 14:12:40,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1650 transitions. [2022-12-13 14:12:40,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:40,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1650 transitions. [2022-12-13 14:12:40,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 66.0) internal successors, (1650), 25 states have internal predecessors, (1650), 0 states have call successors, (0), 0 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 14:12:40,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 149.0) internal successors, (3874), 26 states have internal predecessors, (3874), 0 states have call successors, (0), 0 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 14:12:40,560 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 149.0) internal successors, (3874), 26 states have internal predecessors, (3874), 0 states have call successors, (0), 0 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 14:12:40,560 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 908 flow. Second operand 25 states and 1650 transitions. [2022-12-13 14:12:40,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 259 transitions, 3265 flow [2022-12-13 14:12:40,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 259 transitions, 3233 flow, removed 12 selfloop flow, removed 1 redundant places. [2022-12-13 14:12:40,581 INFO L231 Difference]: Finished difference. Result has 108 places, 171 transitions, 2489 flow [2022-12-13 14:12:40,582 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2489, PETRI_PLACES=108, PETRI_TRANSITIONS=171} [2022-12-13 14:12:40,582 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2022-12-13 14:12:40,582 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 171 transitions, 2489 flow [2022-12-13 14:12:40,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.1875) internal successors, (1011), 16 states have internal predecessors, (1011), 0 states have call successors, (0), 0 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 14:12:40,582 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:40,582 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:40,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 14:12:40,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:40,784 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:40,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:40,786 INFO L85 PathProgramCache]: Analyzing trace with hash 154012118, now seen corresponding path program 7 times [2022-12-13 14:12:40,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:40,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904979695] [2022-12-13 14:12:40,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:40,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:40,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:40,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904979695] [2022-12-13 14:12:40,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904979695] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:40,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146058911] [2022-12-13 14:12:40,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:12:40,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:40,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:40,966 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:12:40,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 14:12:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:41,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 14:12:41,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:12:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:41,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:12:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:41,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146058911] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:12:41,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:12:41,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 14:12:41,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574348761] [2022-12-13 14:12:41,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:12:41,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:12:41,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:41,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:12:41,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:12:41,258 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:12:41,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 171 transitions, 2489 flow. Second operand has 16 states, 16 states have (on average 63.4375) internal successors, (1015), 16 states have internal predecessors, (1015), 0 states have call successors, (0), 0 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 14:12:41,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:41,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:12:41,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:41,758 INFO L130 PetriNetUnfolder]: 599/1177 cut-off events. [2022-12-13 14:12:41,758 INFO L131 PetriNetUnfolder]: For 25229/25229 co-relation queries the response was YES. [2022-12-13 14:12:41,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 1177 events. 599/1177 cut-off events. For 25229/25229 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6806 event pairs, 37 based on Foata normal form. 56/1233 useless extension candidates. Maximal degree in co-relation 8462. Up to 334 conditions per place. [2022-12-13 14:12:41,766 INFO L137 encePairwiseOnDemand]: 141/149 looper letters, 101 selfloop transitions, 130 changer transitions 10/241 dead transitions. [2022-12-13 14:12:41,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 241 transitions, 3509 flow [2022-12-13 14:12:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 14:12:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 14:12:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1460 transitions. [2022-12-13 14:12:41,769 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4453935326418548 [2022-12-13 14:12:41,769 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1460 transitions. [2022-12-13 14:12:41,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1460 transitions. [2022-12-13 14:12:41,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:41,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1460 transitions. [2022-12-13 14:12:41,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.36363636363636) internal successors, (1460), 22 states have internal predecessors, (1460), 0 states have call successors, (0), 0 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 14:12:41,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 149.0) internal successors, (3427), 23 states have internal predecessors, (3427), 0 states have call successors, (0), 0 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 14:12:41,776 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 149.0) internal successors, (3427), 23 states have internal predecessors, (3427), 0 states have call successors, (0), 0 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 14:12:41,776 INFO L175 Difference]: Start difference. First operand has 108 places, 171 transitions, 2489 flow. Second operand 22 states and 1460 transitions. [2022-12-13 14:12:41,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 241 transitions, 3509 flow [2022-12-13 14:12:41,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 241 transitions, 3109 flow, removed 194 selfloop flow, removed 5 redundant places. [2022-12-13 14:12:41,830 INFO L231 Difference]: Finished difference. Result has 126 places, 168 transitions, 2457 flow [2022-12-13 14:12:41,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2457, PETRI_PLACES=126, PETRI_TRANSITIONS=168} [2022-12-13 14:12:41,831 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 106 predicate places. [2022-12-13 14:12:41,831 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 168 transitions, 2457 flow [2022-12-13 14:12:41,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.4375) internal successors, (1015), 16 states have internal predecessors, (1015), 0 states have call successors, (0), 0 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 14:12:41,831 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:41,831 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:41,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 14:12:42,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 14:12:42,033 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:42,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:42,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1991648158, now seen corresponding path program 8 times [2022-12-13 14:12:42,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:42,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031153021] [2022-12-13 14:12:42,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:42,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:42,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:42,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031153021] [2022-12-13 14:12:42,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031153021] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:42,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933351554] [2022-12-13 14:12:42,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:12:42,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:42,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:42,142 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:12:42,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 14:12:42,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:12:42,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:12:42,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 14:12:42,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:12:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:42,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:12:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:42,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933351554] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:12:42,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:12:42,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2022-12-13 14:12:42,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748001992] [2022-12-13 14:12:42,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:12:42,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:12:42,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:42,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:12:42,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:12:42,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:12:42,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 168 transitions, 2457 flow. Second operand has 16 states, 16 states have (on average 63.25) internal successors, (1012), 16 states have internal predecessors, (1012), 0 states have call successors, (0), 0 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 14:12:42,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:42,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:12:42,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:42,877 INFO L130 PetriNetUnfolder]: 765/1562 cut-off events. [2022-12-13 14:12:42,877 INFO L131 PetriNetUnfolder]: For 36543/36543 co-relation queries the response was YES. [2022-12-13 14:12:42,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11845 conditions, 1562 events. 765/1562 cut-off events. For 36543/36543 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9910 event pairs, 25 based on Foata normal form. 24/1586 useless extension candidates. Maximal degree in co-relation 10138. Up to 417 conditions per place. [2022-12-13 14:12:42,888 INFO L137 encePairwiseOnDemand]: 142/149 looper letters, 162 selfloop transitions, 114 changer transitions 3/279 dead transitions. [2022-12-13 14:12:42,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 279 transitions, 4424 flow [2022-12-13 14:12:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 14:12:42,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 14:12:42,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1392 transitions. [2022-12-13 14:12:42,891 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4448705656759348 [2022-12-13 14:12:42,891 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1392 transitions. [2022-12-13 14:12:42,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1392 transitions. [2022-12-13 14:12:42,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:42,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1392 transitions. [2022-12-13 14:12:42,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 66.28571428571429) internal successors, (1392), 21 states have internal predecessors, (1392), 0 states have call successors, (0), 0 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 14:12:42,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 149.0) internal successors, (3278), 22 states have internal predecessors, (3278), 0 states have call successors, (0), 0 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 14:12:42,896 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 149.0) internal successors, (3278), 22 states have internal predecessors, (3278), 0 states have call successors, (0), 0 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 14:12:42,896 INFO L175 Difference]: Start difference. First operand has 126 places, 168 transitions, 2457 flow. Second operand 21 states and 1392 transitions. [2022-12-13 14:12:42,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 279 transitions, 4424 flow [2022-12-13 14:12:42,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 279 transitions, 4289 flow, removed 26 selfloop flow, removed 11 redundant places. [2022-12-13 14:12:42,962 INFO L231 Difference]: Finished difference. Result has 142 places, 214 transitions, 3676 flow [2022-12-13 14:12:42,962 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3676, PETRI_PLACES=142, PETRI_TRANSITIONS=214} [2022-12-13 14:12:42,962 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 122 predicate places. [2022-12-13 14:12:42,962 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 214 transitions, 3676 flow [2022-12-13 14:12:42,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.25) internal successors, (1012), 16 states have internal predecessors, (1012), 0 states have call successors, (0), 0 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 14:12:42,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:42,963 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:42,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 14:12:43,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 14:12:43,165 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:43,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:43,165 INFO L85 PathProgramCache]: Analyzing trace with hash 782051774, now seen corresponding path program 9 times [2022-12-13 14:12:43,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:43,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724980680] [2022-12-13 14:12:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:43,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:43,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:43,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724980680] [2022-12-13 14:12:43,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724980680] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:43,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109592836] [2022-12-13 14:12:43,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:12:43,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:43,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:43,363 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:12:43,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 14:12:43,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 14:12:43,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:12:43,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:12:43,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:12:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:43,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:12:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:43,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109592836] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:12:43,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:12:43,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-13 14:12:43,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845435931] [2022-12-13 14:12:43,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:12:43,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 14:12:43,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:43,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 14:12:43,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-12-13 14:12:43,621 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:12:43,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 214 transitions, 3676 flow. Second operand has 18 states, 18 states have (on average 63.388888888888886) internal successors, (1141), 18 states have internal predecessors, (1141), 0 states have call successors, (0), 0 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 14:12:43,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:43,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:12:43,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:44,156 INFO L130 PetriNetUnfolder]: 765/1557 cut-off events. [2022-12-13 14:12:44,156 INFO L131 PetriNetUnfolder]: For 48840/48840 co-relation queries the response was YES. [2022-12-13 14:12:44,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12253 conditions, 1557 events. 765/1557 cut-off events. For 48840/48840 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 9855 event pairs, 73 based on Foata normal form. 114/1671 useless extension candidates. Maximal degree in co-relation 11430. Up to 992 conditions per place. [2022-12-13 14:12:44,167 INFO L137 encePairwiseOnDemand]: 142/149 looper letters, 192 selfloop transitions, 93 changer transitions 13/298 dead transitions. [2022-12-13 14:12:44,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 298 transitions, 5143 flow [2022-12-13 14:12:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 14:12:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 14:12:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1331 transitions. [2022-12-13 14:12:44,169 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44664429530201344 [2022-12-13 14:12:44,170 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1331 transitions. [2022-12-13 14:12:44,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1331 transitions. [2022-12-13 14:12:44,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:44,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1331 transitions. [2022-12-13 14:12:44,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 66.55) internal successors, (1331), 20 states have internal predecessors, (1331), 0 states have call successors, (0), 0 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 14:12:44,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 149.0) internal successors, (3129), 21 states have internal predecessors, (3129), 0 states have call successors, (0), 0 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 14:12:44,177 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 149.0) internal successors, (3129), 21 states have internal predecessors, (3129), 0 states have call successors, (0), 0 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 14:12:44,177 INFO L175 Difference]: Start difference. First operand has 142 places, 214 transitions, 3676 flow. Second operand 20 states and 1331 transitions. [2022-12-13 14:12:44,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 298 transitions, 5143 flow [2022-12-13 14:12:44,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 298 transitions, 4481 flow, removed 302 selfloop flow, removed 9 redundant places. [2022-12-13 14:12:44,298 INFO L231 Difference]: Finished difference. Result has 155 places, 226 transitions, 3629 flow [2022-12-13 14:12:44,298 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=3052, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3629, PETRI_PLACES=155, PETRI_TRANSITIONS=226} [2022-12-13 14:12:44,299 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2022-12-13 14:12:44,299 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 226 transitions, 3629 flow [2022-12-13 14:12:44,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.388888888888886) internal successors, (1141), 18 states have internal predecessors, (1141), 0 states have call successors, (0), 0 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 14:12:44,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:44,299 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:44,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 14:12:44,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:44,501 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:44,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:44,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1620943413, now seen corresponding path program 10 times [2022-12-13 14:12:44,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:44,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275586597] [2022-12-13 14:12:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:44,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:44,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:44,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275586597] [2022-12-13 14:12:44,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275586597] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:44,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191856868] [2022-12-13 14:12:44,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:12:44,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:44,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:44,585 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:12:44,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 14:12:44,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:12:44,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:12:44,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 14:12:44,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:12:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:44,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:12:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:44,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191856868] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:12:44,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:12:44,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 16 [2022-12-13 14:12:44,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477166196] [2022-12-13 14:12:44,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:12:44,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 14:12:44,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 14:12:44,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-12-13 14:12:44,949 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:12:44,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 226 transitions, 3629 flow. Second operand has 17 states, 17 states have (on average 63.1764705882353) internal successors, (1074), 17 states have internal predecessors, (1074), 0 states have call successors, (0), 0 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 14:12:44,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:44,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:12:44,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:46,271 INFO L130 PetriNetUnfolder]: 1607/3305 cut-off events. [2022-12-13 14:12:46,271 INFO L131 PetriNetUnfolder]: For 58268/58268 co-relation queries the response was YES. [2022-12-13 14:12:46,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23652 conditions, 3305 events. 1607/3305 cut-off events. For 58268/58268 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 24334 event pairs, 67 based on Foata normal form. 102/3407 useless extension candidates. Maximal degree in co-relation 22299. Up to 679 conditions per place. [2022-12-13 14:12:46,292 INFO L137 encePairwiseOnDemand]: 141/149 looper letters, 264 selfloop transitions, 360 changer transitions 66/690 dead transitions. [2022-12-13 14:12:46,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 690 transitions, 11035 flow [2022-12-13 14:12:46,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 14:12:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-13 14:12:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2578 transitions. [2022-12-13 14:12:46,295 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4553161427057577 [2022-12-13 14:12:46,295 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2578 transitions. [2022-12-13 14:12:46,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2578 transitions. [2022-12-13 14:12:46,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:46,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2578 transitions. [2022-12-13 14:12:46,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 67.84210526315789) internal successors, (2578), 38 states have internal predecessors, (2578), 0 states have call successors, (0), 0 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 14:12:46,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 149.0) internal successors, (5811), 39 states have internal predecessors, (5811), 0 states have call successors, (0), 0 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 14:12:46,302 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 149.0) internal successors, (5811), 39 states have internal predecessors, (5811), 0 states have call successors, (0), 0 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 14:12:46,302 INFO L175 Difference]: Start difference. First operand has 155 places, 226 transitions, 3629 flow. Second operand 38 states and 2578 transitions. [2022-12-13 14:12:46,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 690 transitions, 11035 flow [2022-12-13 14:12:46,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 690 transitions, 10788 flow, removed 78 selfloop flow, removed 12 redundant places. [2022-12-13 14:12:46,511 INFO L231 Difference]: Finished difference. Result has 204 places, 466 transitions, 8949 flow [2022-12-13 14:12:46,511 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8949, PETRI_PLACES=204, PETRI_TRANSITIONS=466} [2022-12-13 14:12:46,512 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 184 predicate places. [2022-12-13 14:12:46,512 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 466 transitions, 8949 flow [2022-12-13 14:12:46,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 63.1764705882353) internal successors, (1074), 17 states have internal predecessors, (1074), 0 states have call successors, (0), 0 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 14:12:46,513 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:46,513 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:46,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 14:12:46,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 14:12:46,714 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:46,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash -324589493, now seen corresponding path program 11 times [2022-12-13 14:12:46,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:46,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230185896] [2022-12-13 14:12:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:46,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:46,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230185896] [2022-12-13 14:12:46,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230185896] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:46,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267833530] [2022-12-13 14:12:46,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:12:46,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:46,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:46,843 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:12:46,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 14:12:46,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 14:12:46,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:12:46,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:12:46,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:12:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:46,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:12:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:47,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267833530] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:12:47,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:12:47,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-13 14:12:47,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104631548] [2022-12-13 14:12:47,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:12:47,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 14:12:47,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:47,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 14:12:47,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-12-13 14:12:47,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:12:47,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 466 transitions, 8949 flow. Second operand has 21 states, 21 states have (on average 63.095238095238095) internal successors, (1325), 21 states have internal predecessors, (1325), 0 states have call successors, (0), 0 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 14:12:47,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:47,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:12:47,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:48,565 INFO L130 PetriNetUnfolder]: 1837/3671 cut-off events. [2022-12-13 14:12:48,565 INFO L131 PetriNetUnfolder]: For 106512/106512 co-relation queries the response was YES. [2022-12-13 14:12:48,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32280 conditions, 3671 events. 1837/3671 cut-off events. For 106512/106512 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 26801 event pairs, 22 based on Foata normal form. 56/3727 useless extension candidates. Maximal degree in co-relation 31681. Up to 1107 conditions per place. [2022-12-13 14:12:48,598 INFO L137 encePairwiseOnDemand]: 142/149 looper letters, 261 selfloop transitions, 420 changer transitions 27/708 dead transitions. [2022-12-13 14:12:48,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 708 transitions, 14163 flow [2022-12-13 14:12:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 14:12:48,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 14:12:48,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1607 transitions. [2022-12-13 14:12:48,601 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4493847874720358 [2022-12-13 14:12:48,601 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1607 transitions. [2022-12-13 14:12:48,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1607 transitions. [2022-12-13 14:12:48,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:48,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1607 transitions. [2022-12-13 14:12:48,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 66.95833333333333) internal successors, (1607), 24 states have internal predecessors, (1607), 0 states have call successors, (0), 0 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 14:12:48,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 149.0) internal successors, (3725), 25 states have internal predecessors, (3725), 0 states have call successors, (0), 0 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 14:12:48,607 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 149.0) internal successors, (3725), 25 states have internal predecessors, (3725), 0 states have call successors, (0), 0 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 14:12:48,607 INFO L175 Difference]: Start difference. First operand has 204 places, 466 transitions, 8949 flow. Second operand 24 states and 1607 transitions. [2022-12-13 14:12:48,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 708 transitions, 14163 flow [2022-12-13 14:12:49,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 708 transitions, 13086 flow, removed 469 selfloop flow, removed 8 redundant places. [2022-12-13 14:12:49,134 INFO L231 Difference]: Finished difference. Result has 224 places, 545 transitions, 11203 flow [2022-12-13 14:12:49,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=8238, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11203, PETRI_PLACES=224, PETRI_TRANSITIONS=545} [2022-12-13 14:12:49,135 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 204 predicate places. [2022-12-13 14:12:49,135 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 545 transitions, 11203 flow [2022-12-13 14:12:49,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.095238095238095) internal successors, (1325), 21 states have internal predecessors, (1325), 0 states have call successors, (0), 0 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 14:12:49,135 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:49,135 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:49,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 14:12:49,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:49,337 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:49,337 INFO L85 PathProgramCache]: Analyzing trace with hash -2076486686, now seen corresponding path program 12 times [2022-12-13 14:12:49,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:49,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286030750] [2022-12-13 14:12:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:49,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:49,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:49,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286030750] [2022-12-13 14:12:49,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286030750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:49,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689105951] [2022-12-13 14:12:49,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:12:49,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:49,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:49,456 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:12:49,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 14:12:49,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 14:12:49,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:12:49,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 14:12:49,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:12:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:49,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:12:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:49,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689105951] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:12:49,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:12:49,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7] total 10 [2022-12-13 14:12:49,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377482751] [2022-12-13 14:12:49,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:12:49,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 14:12:49,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:49,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 14:12:49,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 14:12:49,760 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 149 [2022-12-13 14:12:49,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 545 transitions, 11203 flow. Second operand has 12 states, 12 states have (on average 72.58333333333333) internal successors, (871), 12 states have internal predecessors, (871), 0 states have call successors, (0), 0 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 14:12:49,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:49,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 149 [2022-12-13 14:12:49,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:51,137 INFO L130 PetriNetUnfolder]: 2394/4789 cut-off events. [2022-12-13 14:12:51,138 INFO L131 PetriNetUnfolder]: For 161462/161472 co-relation queries the response was YES. [2022-12-13 14:12:51,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43457 conditions, 4789 events. 2394/4789 cut-off events. For 161462/161472 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 37048 event pairs, 261 based on Foata normal form. 14/4797 useless extension candidates. Maximal degree in co-relation 42962. Up to 1754 conditions per place. [2022-12-13 14:12:51,186 INFO L137 encePairwiseOnDemand]: 145/149 looper letters, 414 selfloop transitions, 337 changer transitions 35/797 dead transitions. [2022-12-13 14:12:51,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 797 transitions, 17388 flow [2022-12-13 14:12:51,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:12:51,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:12:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 477 transitions. [2022-12-13 14:12:51,187 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5335570469798657 [2022-12-13 14:12:51,187 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 477 transitions. [2022-12-13 14:12:51,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 477 transitions. [2022-12-13 14:12:51,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:51,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 477 transitions. [2022-12-13 14:12:51,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.5) internal successors, (477), 6 states have internal predecessors, (477), 0 states have call successors, (0), 0 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 14:12:51,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:12:51,189 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 149.0) internal successors, (1043), 7 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:12:51,189 INFO L175 Difference]: Start difference. First operand has 224 places, 545 transitions, 11203 flow. Second operand 6 states and 477 transitions. [2022-12-13 14:12:51,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 797 transitions, 17388 flow [2022-12-13 14:12:52,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 797 transitions, 16780 flow, removed 283 selfloop flow, removed 8 redundant places. [2022-12-13 14:12:52,114 INFO L231 Difference]: Finished difference. Result has 225 places, 650 transitions, 14593 flow [2022-12-13 14:12:52,115 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=10739, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14593, PETRI_PLACES=225, PETRI_TRANSITIONS=650} [2022-12-13 14:12:52,115 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 205 predicate places. [2022-12-13 14:12:52,115 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 650 transitions, 14593 flow [2022-12-13 14:12:52,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 72.58333333333333) internal successors, (871), 12 states have internal predecessors, (871), 0 states have call successors, (0), 0 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 14:12:52,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:52,115 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:52,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 14:12:52,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 14:12:52,316 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:52,317 INFO L85 PathProgramCache]: Analyzing trace with hash -415849551, now seen corresponding path program 13 times [2022-12-13 14:12:52,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:52,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198411721] [2022-12-13 14:12:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:52,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:52,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:52,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198411721] [2022-12-13 14:12:52,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198411721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:52,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108495022] [2022-12-13 14:12:52,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:12:52,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:52,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:52,440 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:12:52,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 14:12:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:52,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:12:52,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:12:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:52,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:12:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:52,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108495022] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:12:52,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:12:52,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-12-13 14:12:52,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999804571] [2022-12-13 14:12:52,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:12:52,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 14:12:52,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:52,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 14:12:52,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-12-13 14:12:52,756 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:12:52,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 650 transitions, 14593 flow. Second operand has 22 states, 22 states have (on average 63.09090909090909) internal successors, (1388), 22 states have internal predecessors, (1388), 0 states have call successors, (0), 0 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 14:12:52,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:52,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:12:52,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:54,826 INFO L130 PetriNetUnfolder]: 2637/5281 cut-off events. [2022-12-13 14:12:54,826 INFO L131 PetriNetUnfolder]: For 193104/193104 co-relation queries the response was YES. [2022-12-13 14:12:54,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49486 conditions, 5281 events. 2637/5281 cut-off events. For 193104/193104 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 41503 event pairs, 23 based on Foata normal form. 92/5373 useless extension candidates. Maximal degree in co-relation 48952. Up to 2190 conditions per place. [2022-12-13 14:12:54,864 INFO L137 encePairwiseOnDemand]: 141/149 looper letters, 258 selfloop transitions, 571 changer transitions 13/842 dead transitions. [2022-12-13 14:12:54,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 842 transitions, 19286 flow [2022-12-13 14:12:54,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 14:12:54,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 14:12:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1734 transitions. [2022-12-13 14:12:54,867 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4475993804852865 [2022-12-13 14:12:54,867 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1734 transitions. [2022-12-13 14:12:54,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1734 transitions. [2022-12-13 14:12:54,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:54,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1734 transitions. [2022-12-13 14:12:54,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 66.6923076923077) internal successors, (1734), 26 states have internal predecessors, (1734), 0 states have call successors, (0), 0 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 14:12:54,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 149.0) internal successors, (4023), 27 states have internal predecessors, (4023), 0 states have call successors, (0), 0 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 14:12:54,871 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 149.0) internal successors, (4023), 27 states have internal predecessors, (4023), 0 states have call successors, (0), 0 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 14:12:54,871 INFO L175 Difference]: Start difference. First operand has 225 places, 650 transitions, 14593 flow. Second operand 26 states and 1734 transitions. [2022-12-13 14:12:54,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 842 transitions, 19286 flow [2022-12-13 14:12:55,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 842 transitions, 19040 flow, removed 114 selfloop flow, removed 1 redundant places. [2022-12-13 14:12:55,947 INFO L231 Difference]: Finished difference. Result has 258 places, 724 transitions, 18109 flow [2022-12-13 14:12:55,947 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=14373, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=494, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=18109, PETRI_PLACES=258, PETRI_TRANSITIONS=724} [2022-12-13 14:12:55,948 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 238 predicate places. [2022-12-13 14:12:55,948 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 724 transitions, 18109 flow [2022-12-13 14:12:55,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 63.09090909090909) internal successors, (1388), 22 states have internal predecessors, (1388), 0 states have call successors, (0), 0 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 14:12:55,948 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:12:55,948 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:12:55,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 14:12:56,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 14:12:56,149 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:12:56,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:12:56,150 INFO L85 PathProgramCache]: Analyzing trace with hash -444579895, now seen corresponding path program 14 times [2022-12-13 14:12:56,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:12:56,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582225434] [2022-12-13 14:12:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:12:56,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:12:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:12:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:56,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:12:56,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582225434] [2022-12-13 14:12:56,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582225434] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:12:56,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485677061] [2022-12-13 14:12:56,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:12:56,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:12:56,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:12:56,276 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:12:56,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 14:12:56,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:12:56,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:12:56,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:12:56,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:12:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:56,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:12:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:12:56,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485677061] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:12:56,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:12:56,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-12-13 14:12:56,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362090336] [2022-12-13 14:12:56,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:12:56,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 14:12:56,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:12:56,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 14:12:56,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-12-13 14:12:56,673 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:12:56,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 724 transitions, 18109 flow. Second operand has 22 states, 22 states have (on average 63.18181818181818) internal successors, (1390), 22 states have internal predecessors, (1390), 0 states have call successors, (0), 0 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 14:12:56,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:12:56,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:12:56,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:12:59,095 INFO L130 PetriNetUnfolder]: 2796/5588 cut-off events. [2022-12-13 14:12:59,095 INFO L131 PetriNetUnfolder]: For 277636/277636 co-relation queries the response was YES. [2022-12-13 14:12:59,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57343 conditions, 5588 events. 2796/5588 cut-off events. For 277636/277636 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 44308 event pairs, 23 based on Foata normal form. 112/5700 useless extension candidates. Maximal degree in co-relation 56777. Up to 1932 conditions per place. [2022-12-13 14:12:59,142 INFO L137 encePairwiseOnDemand]: 141/149 looper letters, 272 selfloop transitions, 632 changer transitions 11/915 dead transitions. [2022-12-13 14:12:59,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 915 transitions, 22951 flow [2022-12-13 14:12:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 14:12:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 14:12:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1926 transitions. [2022-12-13 14:12:59,145 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44573015505669983 [2022-12-13 14:12:59,145 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1926 transitions. [2022-12-13 14:12:59,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1926 transitions. [2022-12-13 14:12:59,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:12:59,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1926 transitions. [2022-12-13 14:12:59,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 66.41379310344827) internal successors, (1926), 29 states have internal predecessors, (1926), 0 states have call successors, (0), 0 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 14:12:59,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 149.0) internal successors, (4470), 30 states have internal predecessors, (4470), 0 states have call successors, (0), 0 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 14:12:59,151 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 149.0) internal successors, (4470), 30 states have internal predecessors, (4470), 0 states have call successors, (0), 0 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 14:12:59,151 INFO L175 Difference]: Start difference. First operand has 258 places, 724 transitions, 18109 flow. Second operand 29 states and 1926 transitions. [2022-12-13 14:12:59,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 915 transitions, 22951 flow [2022-12-13 14:13:00,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 915 transitions, 22571 flow, removed 160 selfloop flow, removed 8 redundant places. [2022-12-13 14:13:00,742 INFO L231 Difference]: Finished difference. Result has 284 places, 783 transitions, 20870 flow [2022-12-13 14:13:00,742 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=17745, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=20870, PETRI_PLACES=284, PETRI_TRANSITIONS=783} [2022-12-13 14:13:00,742 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 264 predicate places. [2022-12-13 14:13:00,743 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 783 transitions, 20870 flow [2022-12-13 14:13:00,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 63.18181818181818) internal successors, (1390), 22 states have internal predecessors, (1390), 0 states have call successors, (0), 0 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 14:13:00,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:13:00,743 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:00,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 14:13:00,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 14:13:00,944 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:13:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:00,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1405856439, now seen corresponding path program 15 times [2022-12-13 14:13:00,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:00,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724024296] [2022-12-13 14:13:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:00,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:01,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:01,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724024296] [2022-12-13 14:13:01,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724024296] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:13:01,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435387817] [2022-12-13 14:13:01,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:13:01,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:13:01,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:13:01,059 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:13:01,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 14:13:01,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 14:13:01,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:13:01,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 14:13:01,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:13:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:01,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:13:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:01,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435387817] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:13:01,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:13:01,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-13 14:13:01,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666690244] [2022-12-13 14:13:01,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:13:01,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 14:13:01,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:01,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 14:13:01,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-12-13 14:13:01,434 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:13:01,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 783 transitions, 20870 flow. Second operand has 21 states, 21 states have (on average 62.95238095238095) internal successors, (1322), 21 states have internal predecessors, (1322), 0 states have call successors, (0), 0 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 14:13:01,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:13:01,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:13:01,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:13:04,660 INFO L130 PetriNetUnfolder]: 3474/7017 cut-off events. [2022-12-13 14:13:04,660 INFO L131 PetriNetUnfolder]: For 428481/428481 co-relation queries the response was YES. [2022-12-13 14:13:04,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78090 conditions, 7017 events. 3474/7017 cut-off events. For 428481/428481 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 58026 event pairs, 50 based on Foata normal form. 92/7109 useless extension candidates. Maximal degree in co-relation 77343. Up to 1346 conditions per place. [2022-12-13 14:13:04,724 INFO L137 encePairwiseOnDemand]: 141/149 looper letters, 222 selfloop transitions, 889 changer transitions 19/1130 dead transitions. [2022-12-13 14:13:04,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1130 transitions, 30751 flow [2022-12-13 14:13:04,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 14:13:04,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 14:13:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2250 transitions. [2022-12-13 14:13:04,726 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44413738649822343 [2022-12-13 14:13:04,726 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2250 transitions. [2022-12-13 14:13:04,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2250 transitions. [2022-12-13 14:13:04,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:13:04,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2250 transitions. [2022-12-13 14:13:04,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 66.17647058823529) internal successors, (2250), 34 states have internal predecessors, (2250), 0 states have call successors, (0), 0 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 14:13:04,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 149.0) internal successors, (5215), 35 states have internal predecessors, (5215), 0 states have call successors, (0), 0 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 14:13:04,732 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 149.0) internal successors, (5215), 35 states have internal predecessors, (5215), 0 states have call successors, (0), 0 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 14:13:04,732 INFO L175 Difference]: Start difference. First operand has 284 places, 783 transitions, 20870 flow. Second operand 34 states and 2250 transitions. [2022-12-13 14:13:04,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1130 transitions, 30751 flow [2022-12-13 14:13:07,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1130 transitions, 29244 flow, removed 180 selfloop flow, removed 17 redundant places. [2022-12-13 14:13:07,391 INFO L231 Difference]: Finished difference. Result has 307 places, 989 transitions, 27603 flow [2022-12-13 14:13:07,391 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=19619, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=698, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=27603, PETRI_PLACES=307, PETRI_TRANSITIONS=989} [2022-12-13 14:13:07,392 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 287 predicate places. [2022-12-13 14:13:07,392 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 989 transitions, 27603 flow [2022-12-13 14:13:07,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 62.95238095238095) internal successors, (1322), 21 states have internal predecessors, (1322), 0 states have call successors, (0), 0 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 14:13:07,392 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:13:07,392 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:07,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 14:13:07,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 14:13:07,594 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:13:07,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:07,595 INFO L85 PathProgramCache]: Analyzing trace with hash -235691339, now seen corresponding path program 16 times [2022-12-13 14:13:07,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:07,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122817907] [2022-12-13 14:13:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:07,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:07,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:07,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122817907] [2022-12-13 14:13:07,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122817907] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:13:07,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473737720] [2022-12-13 14:13:07,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:13:07,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:13:07,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:13:07,729 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:13:07,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 14:13:07,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:13:07,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:13:07,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 14:13:07,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:13:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:07,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:13:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:08,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473737720] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:13:08,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:13:08,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-12-13 14:13:08,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11747018] [2022-12-13 14:13:08,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:13:08,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 14:13:08,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:08,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 14:13:08,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-12-13 14:13:08,146 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:13:08,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 989 transitions, 27603 flow. Second operand has 21 states, 21 states have (on average 63.0) internal successors, (1323), 21 states have internal predecessors, (1323), 0 states have call successors, (0), 0 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 14:13:08,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:13:08,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:13:08,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:13:12,092 INFO L130 PetriNetUnfolder]: 4002/8110 cut-off events. [2022-12-13 14:13:12,092 INFO L131 PetriNetUnfolder]: For 508255/508255 co-relation queries the response was YES. [2022-12-13 14:13:12,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91801 conditions, 8110 events. 4002/8110 cut-off events. For 508255/508255 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 69515 event pairs, 159 based on Foata normal form. 80/8190 useless extension candidates. Maximal degree in co-relation 90984. Up to 4036 conditions per place. [2022-12-13 14:13:12,195 INFO L137 encePairwiseOnDemand]: 142/149 looper letters, 998 selfloop transitions, 406 changer transitions 19/1423 dead transitions. [2022-12-13 14:13:12,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1423 transitions, 39575 flow [2022-12-13 14:13:12,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 14:13:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-13 14:13:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1996 transitions. [2022-12-13 14:13:12,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4465324384787472 [2022-12-13 14:13:12,198 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1996 transitions. [2022-12-13 14:13:12,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1996 transitions. [2022-12-13 14:13:12,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:13:12,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1996 transitions. [2022-12-13 14:13:12,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 66.53333333333333) internal successors, (1996), 30 states have internal predecessors, (1996), 0 states have call successors, (0), 0 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 14:13:12,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 149.0) internal successors, (4619), 31 states have internal predecessors, (4619), 0 states have call successors, (0), 0 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 14:13:12,203 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 149.0) internal successors, (4619), 31 states have internal predecessors, (4619), 0 states have call successors, (0), 0 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 14:13:12,203 INFO L175 Difference]: Start difference. First operand has 307 places, 989 transitions, 27603 flow. Second operand 30 states and 1996 transitions. [2022-12-13 14:13:12,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1423 transitions, 39575 flow [2022-12-13 14:13:16,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1423 transitions, 38304 flow, removed 593 selfloop flow, removed 7 redundant places. [2022-12-13 14:13:16,838 INFO L231 Difference]: Finished difference. Result has 340 places, 1203 transitions, 33947 flow [2022-12-13 14:13:16,839 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=26617, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=989, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=33947, PETRI_PLACES=340, PETRI_TRANSITIONS=1203} [2022-12-13 14:13:16,839 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 320 predicate places. [2022-12-13 14:13:16,839 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1203 transitions, 33947 flow [2022-12-13 14:13:16,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.0) internal successors, (1323), 21 states have internal predecessors, (1323), 0 states have call successors, (0), 0 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 14:13:16,839 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:13:16,839 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:16,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 14:13:17,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:13:17,041 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:13:17,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:17,041 INFO L85 PathProgramCache]: Analyzing trace with hash 258760213, now seen corresponding path program 17 times [2022-12-13 14:13:17,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:17,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049869989] [2022-12-13 14:13:17,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:17,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:17,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:17,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049869989] [2022-12-13 14:13:17,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049869989] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:13:17,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508287718] [2022-12-13 14:13:17,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:13:17,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:13:17,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:13:17,149 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:13:17,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 14:13:17,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 14:13:17,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:13:17,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 14:13:17,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:13:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:17,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:13:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:17,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508287718] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:13:17,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:13:17,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-12-13 14:13:17,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136659281] [2022-12-13 14:13:17,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:13:17,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 14:13:17,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:17,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 14:13:17,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-12-13 14:13:17,477 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:13:17,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1203 transitions, 33947 flow. Second operand has 23 states, 23 states have (on average 62.869565217391305) internal successors, (1446), 23 states have internal predecessors, (1446), 0 states have call successors, (0), 0 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 14:13:17,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:13:17,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:13:17,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:13:22,330 INFO L130 PetriNetUnfolder]: 4561/9242 cut-off events. [2022-12-13 14:13:22,330 INFO L131 PetriNetUnfolder]: For 628395/628395 co-relation queries the response was YES. [2022-12-13 14:13:22,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103900 conditions, 9242 events. 4561/9242 cut-off events. For 628395/628395 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 81176 event pairs, 131 based on Foata normal form. 292/9534 useless extension candidates. Maximal degree in co-relation 103050. Up to 3179 conditions per place. [2022-12-13 14:13:22,424 INFO L137 encePairwiseOnDemand]: 141/149 looper letters, 496 selfloop transitions, 1050 changer transitions 27/1573 dead transitions. [2022-12-13 14:13:22,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1573 transitions, 45401 flow [2022-12-13 14:13:22,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 14:13:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 14:13:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2059 transitions. [2022-12-13 14:13:22,426 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44576748213899114 [2022-12-13 14:13:22,426 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2059 transitions. [2022-12-13 14:13:22,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2059 transitions. [2022-12-13 14:13:22,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:13:22,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2059 transitions. [2022-12-13 14:13:22,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 66.41935483870968) internal successors, (2059), 31 states have internal predecessors, (2059), 0 states have call successors, (0), 0 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 14:13:22,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 149.0) internal successors, (4768), 32 states have internal predecessors, (4768), 0 states have call successors, (0), 0 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 14:13:22,431 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 149.0) internal successors, (4768), 32 states have internal predecessors, (4768), 0 states have call successors, (0), 0 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 14:13:22,431 INFO L175 Difference]: Start difference. First operand has 340 places, 1203 transitions, 33947 flow. Second operand 31 states and 2059 transitions. [2022-12-13 14:13:22,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1573 transitions, 45401 flow [2022-12-13 14:13:27,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1573 transitions, 44712 flow, removed 260 selfloop flow, removed 13 redundant places. [2022-12-13 14:13:28,003 INFO L231 Difference]: Finished difference. Result has 368 places, 1402 transitions, 42458 flow [2022-12-13 14:13:28,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=33285, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=850, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=42458, PETRI_PLACES=368, PETRI_TRANSITIONS=1402} [2022-12-13 14:13:28,004 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 348 predicate places. [2022-12-13 14:13:28,004 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 1402 transitions, 42458 flow [2022-12-13 14:13:28,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 62.869565217391305) internal successors, (1446), 23 states have internal predecessors, (1446), 0 states have call successors, (0), 0 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 14:13:28,004 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:13:28,004 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:28,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 14:13:28,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-12-13 14:13:28,205 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:13:28,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:28,205 INFO L85 PathProgramCache]: Analyzing trace with hash -711932559, now seen corresponding path program 18 times [2022-12-13 14:13:28,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:28,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513624427] [2022-12-13 14:13:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:28,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:28,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:28,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513624427] [2022-12-13 14:13:28,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513624427] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:13:28,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031760162] [2022-12-13 14:13:28,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:13:28,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:13:28,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:13:28,317 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:13:28,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 14:13:28,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 14:13:28,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:13:28,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:13:28,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:13:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:28,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:13:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:28,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031760162] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:13:28,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:13:28,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-13 14:13:28,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286729934] [2022-12-13 14:13:28,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:13:28,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:13:28,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:28,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:13:28,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-12-13 14:13:28,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:13:28,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 1402 transitions, 42458 flow. Second operand has 24 states, 24 states have (on average 63.041666666666664) internal successors, (1513), 24 states have internal predecessors, (1513), 0 states have call successors, (0), 0 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 14:13:28,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:13:28,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:13:28,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:13:34,493 INFO L130 PetriNetUnfolder]: 4852/9839 cut-off events. [2022-12-13 14:13:34,493 INFO L131 PetriNetUnfolder]: For 729163/729163 co-relation queries the response was YES. [2022-12-13 14:13:34,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116305 conditions, 9839 events. 4852/9839 cut-off events. For 729163/729163 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 87442 event pairs, 483 based on Foata normal form. 270/10109 useless extension candidates. Maximal degree in co-relation 115334. Up to 8354 conditions per place. [2022-12-13 14:13:34,596 INFO L137 encePairwiseOnDemand]: 142/149 looper letters, 1361 selfloop transitions, 241 changer transitions 32/1634 dead transitions. [2022-12-13 14:13:34,596 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1634 transitions, 50667 flow [2022-12-13 14:13:34,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 14:13:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 14:13:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1870 transitions. [2022-12-13 14:13:34,599 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4482262703739214 [2022-12-13 14:13:34,599 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1870 transitions. [2022-12-13 14:13:34,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1870 transitions. [2022-12-13 14:13:34,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:13:34,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1870 transitions. [2022-12-13 14:13:34,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 66.78571428571429) internal successors, (1870), 28 states have internal predecessors, (1870), 0 states have call successors, (0), 0 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 14:13:34,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 149.0) internal successors, (4321), 29 states have internal predecessors, (4321), 0 states have call successors, (0), 0 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 14:13:34,604 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 149.0) internal successors, (4321), 29 states have internal predecessors, (4321), 0 states have call successors, (0), 0 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 14:13:34,604 INFO L175 Difference]: Start difference. First operand has 368 places, 1402 transitions, 42458 flow. Second operand 28 states and 1870 transitions. [2022-12-13 14:13:34,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1634 transitions, 50667 flow [2022-12-13 14:13:41,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1634 transitions, 49748 flow, removed 409 selfloop flow, removed 14 redundant places. [2022-12-13 14:13:41,143 INFO L231 Difference]: Finished difference. Result has 391 places, 1488 transitions, 45369 flow [2022-12-13 14:13:41,144 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=41534, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=45369, PETRI_PLACES=391, PETRI_TRANSITIONS=1488} [2022-12-13 14:13:41,145 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 371 predicate places. [2022-12-13 14:13:41,145 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 1488 transitions, 45369 flow [2022-12-13 14:13:41,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 63.041666666666664) internal successors, (1513), 24 states have internal predecessors, (1513), 0 states have call successors, (0), 0 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 14:13:41,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:13:41,145 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:41,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 14:13:41,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:13:41,346 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:13:41,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:41,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1350260707, now seen corresponding path program 19 times [2022-12-13 14:13:41,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:41,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561292830] [2022-12-13 14:13:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:41,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:41,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:41,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561292830] [2022-12-13 14:13:41,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561292830] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:13:41,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785158600] [2022-12-13 14:13:41,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:13:41,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:13:41,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:13:41,467 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:13:41,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 14:13:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:41,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 14:13:41,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:13:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:41,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:13:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:41,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785158600] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:13:41,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:13:41,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2022-12-13 14:13:41,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078467391] [2022-12-13 14:13:41,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:13:41,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 14:13:41,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:41,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 14:13:41,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2022-12-13 14:13:41,764 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:13:41,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 1488 transitions, 45369 flow. Second operand has 22 states, 22 states have (on average 62.90909090909091) internal successors, (1384), 22 states have internal predecessors, (1384), 0 states have call successors, (0), 0 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 14:13:41,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:13:41,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:13:41,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:13:48,398 INFO L130 PetriNetUnfolder]: 5166/10488 cut-off events. [2022-12-13 14:13:48,398 INFO L131 PetriNetUnfolder]: For 920855/920855 co-relation queries the response was YES. [2022-12-13 14:13:48,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132488 conditions, 10488 events. 5166/10488 cut-off events. For 920855/920855 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 94279 event pairs, 89 based on Foata normal form. 60/10548 useless extension candidates. Maximal degree in co-relation 131605. Up to 3135 conditions per place. [2022-12-13 14:13:48,512 INFO L137 encePairwiseOnDemand]: 141/149 looper letters, 979 selfloop transitions, 736 changer transitions 15/1730 dead transitions. [2022-12-13 14:13:48,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 1730 transitions, 54856 flow [2022-12-13 14:13:48,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 14:13:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 14:13:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2177 transitions. [2022-12-13 14:13:48,515 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44274964409192596 [2022-12-13 14:13:48,515 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2177 transitions. [2022-12-13 14:13:48,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2177 transitions. [2022-12-13 14:13:48,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:13:48,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2177 transitions. [2022-12-13 14:13:48,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 65.96969696969697) internal successors, (2177), 33 states have internal predecessors, (2177), 0 states have call successors, (0), 0 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 14:13:48,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 149.0) internal successors, (5066), 34 states have internal predecessors, (5066), 0 states have call successors, (0), 0 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 14:13:48,522 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 149.0) internal successors, (5066), 34 states have internal predecessors, (5066), 0 states have call successors, (0), 0 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 14:13:48,522 INFO L175 Difference]: Start difference. First operand has 391 places, 1488 transitions, 45369 flow. Second operand 33 states and 2177 transitions. [2022-12-13 14:13:48,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 1730 transitions, 54856 flow [2022-12-13 14:13:56,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 1730 transitions, 53549 flow, removed 431 selfloop flow, removed 14 redundant places. [2022-12-13 14:13:57,036 INFO L231 Difference]: Finished difference. Result has 419 places, 1615 transitions, 51022 flow [2022-12-13 14:13:57,036 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=44038, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=810, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=51022, PETRI_PLACES=419, PETRI_TRANSITIONS=1615} [2022-12-13 14:13:57,037 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 399 predicate places. [2022-12-13 14:13:57,037 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 1615 transitions, 51022 flow [2022-12-13 14:13:57,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.90909090909091) internal successors, (1384), 22 states have internal predecessors, (1384), 0 states have call successors, (0), 0 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 14:13:57,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:13:57,037 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:13:57,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 14:13:57,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:13:57,238 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:13:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:13:57,239 INFO L85 PathProgramCache]: Analyzing trace with hash -57724942, now seen corresponding path program 20 times [2022-12-13 14:13:57,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:13:57,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220679855] [2022-12-13 14:13:57,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:13:57,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:13:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:13:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:57,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:13:57,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220679855] [2022-12-13 14:13:57,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220679855] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:13:57,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663102572] [2022-12-13 14:13:57,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:13:57,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:13:57,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:13:57,339 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:13:57,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 14:13:57,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:13:57,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:13:57,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 14:13:57,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:13:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:57,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:13:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:13:57,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663102572] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:13:57,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:13:57,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2022-12-13 14:13:57,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129876651] [2022-12-13 14:13:57,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:13:57,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 14:13:57,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:13:57,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 14:13:57,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-12-13 14:13:57,869 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:13:57,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 1615 transitions, 51022 flow. Second operand has 22 states, 22 states have (on average 62.95454545454545) internal successors, (1385), 22 states have internal predecessors, (1385), 0 states have call successors, (0), 0 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 14:13:57,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:13:57,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:13:57,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:14:06,501 INFO L130 PetriNetUnfolder]: 5649/11558 cut-off events. [2022-12-13 14:14:06,501 INFO L131 PetriNetUnfolder]: For 1257838/1257838 co-relation queries the response was YES. [2022-12-13 14:14:06,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150925 conditions, 11558 events. 5649/11558 cut-off events. For 1257838/1257838 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 106134 event pairs, 189 based on Foata normal form. 320/11878 useless extension candidates. Maximal degree in co-relation 149972. Up to 2512 conditions per place. [2022-12-13 14:14:06,640 INFO L137 encePairwiseOnDemand]: 142/149 looper letters, 737 selfloop transitions, 1244 changer transitions 71/2052 dead transitions. [2022-12-13 14:14:06,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 2052 transitions, 66331 flow [2022-12-13 14:14:06,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 14:14:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 14:14:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2243 transitions. [2022-12-13 14:14:06,643 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45617246288387225 [2022-12-13 14:14:06,643 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2243 transitions. [2022-12-13 14:14:06,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2243 transitions. [2022-12-13 14:14:06,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:14:06,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2243 transitions. [2022-12-13 14:14:06,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 67.96969696969697) internal successors, (2243), 33 states have internal predecessors, (2243), 0 states have call successors, (0), 0 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 14:14:06,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 149.0) internal successors, (5066), 34 states have internal predecessors, (5066), 0 states have call successors, (0), 0 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 14:14:06,648 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 149.0) internal successors, (5066), 34 states have internal predecessors, (5066), 0 states have call successors, (0), 0 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 14:14:06,649 INFO L175 Difference]: Start difference. First operand has 419 places, 1615 transitions, 51022 flow. Second operand 33 states and 2243 transitions. [2022-12-13 14:14:06,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 2052 transitions, 66331 flow [2022-12-13 14:14:18,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 2052 transitions, 64208 flow, removed 993 selfloop flow, removed 12 redundant places. [2022-12-13 14:14:18,106 INFO L231 Difference]: Finished difference. Result has 458 places, 1757 transitions, 59654 flow [2022-12-13 14:14:18,107 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=49335, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1094, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=59654, PETRI_PLACES=458, PETRI_TRANSITIONS=1757} [2022-12-13 14:14:18,107 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 438 predicate places. [2022-12-13 14:14:18,107 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 1757 transitions, 59654 flow [2022-12-13 14:14:18,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.95454545454545) internal successors, (1385), 22 states have internal predecessors, (1385), 0 states have call successors, (0), 0 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 14:14:18,107 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:14:18,108 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:18,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 14:14:18,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 14:14:18,308 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:14:18,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:18,309 INFO L85 PathProgramCache]: Analyzing trace with hash -535474644, now seen corresponding path program 21 times [2022-12-13 14:14:18,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:18,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070554988] [2022-12-13 14:14:18,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:18,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:18,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:14:18,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:18,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070554988] [2022-12-13 14:14:18,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070554988] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:14:18,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998452394] [2022-12-13 14:14:18,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:14:18,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:18,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:14:18,423 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:14:18,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 14:14:18,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 14:14:18,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:14:18,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 14:14:18,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:14:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:14:18,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:14:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:14:18,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998452394] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:14:18,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:14:18,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2022-12-13 14:14:18,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191154529] [2022-12-13 14:14:18,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:14:18,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 14:14:18,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:18,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 14:14:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2022-12-13 14:14:18,897 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:14:18,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 1757 transitions, 59654 flow. Second operand has 28 states, 28 states have (on average 63.035714285714285) internal successors, (1765), 28 states have internal predecessors, (1765), 0 states have call successors, (0), 0 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 14:14:18,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:14:18,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:14:18,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:14:28,644 INFO L130 PetriNetUnfolder]: 6058/12372 cut-off events. [2022-12-13 14:14:28,644 INFO L131 PetriNetUnfolder]: For 1415603/1415603 co-relation queries the response was YES. [2022-12-13 14:14:28,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171527 conditions, 12372 events. 6058/12372 cut-off events. For 1415603/1415603 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 114553 event pairs, 12 based on Foata normal form. 72/12444 useless extension candidates. Maximal degree in co-relation 170314. Up to 3028 conditions per place. [2022-12-13 14:14:28,827 INFO L137 encePairwiseOnDemand]: 140/149 looper letters, 602 selfloop transitions, 1527 changer transitions 30/2159 dead transitions. [2022-12-13 14:14:28,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 2159 transitions, 73548 flow [2022-12-13 14:14:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 14:14:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-13 14:14:28,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2667 transitions. [2022-12-13 14:14:28,830 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44748322147651004 [2022-12-13 14:14:28,830 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2667 transitions. [2022-12-13 14:14:28,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2667 transitions. [2022-12-13 14:14:28,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:14:28,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2667 transitions. [2022-12-13 14:14:28,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 66.675) internal successors, (2667), 40 states have internal predecessors, (2667), 0 states have call successors, (0), 0 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 14:14:28,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 149.0) internal successors, (6109), 41 states have internal predecessors, (6109), 0 states have call successors, (0), 0 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 14:14:28,836 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 149.0) internal successors, (6109), 41 states have internal predecessors, (6109), 0 states have call successors, (0), 0 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 14:14:28,836 INFO L175 Difference]: Start difference. First operand has 458 places, 1757 transitions, 59654 flow. Second operand 40 states and 2667 transitions. [2022-12-13 14:14:28,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 2159 transitions, 73548 flow [2022-12-13 14:14:44,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 2159 transitions, 71687 flow, removed 429 selfloop flow, removed 12 redundant places. [2022-12-13 14:14:44,859 INFO L231 Difference]: Finished difference. Result has 491 places, 1905 transitions, 67938 flow [2022-12-13 14:14:44,860 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=58076, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=67938, PETRI_PLACES=491, PETRI_TRANSITIONS=1905} [2022-12-13 14:14:44,860 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 471 predicate places. [2022-12-13 14:14:44,860 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 1905 transitions, 67938 flow [2022-12-13 14:14:44,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 63.035714285714285) internal successors, (1765), 28 states have internal predecessors, (1765), 0 states have call successors, (0), 0 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 14:14:44,861 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:14:44,861 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:14:44,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 14:14:45,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:45,062 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:14:45,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:14:45,063 INFO L85 PathProgramCache]: Analyzing trace with hash -575961304, now seen corresponding path program 22 times [2022-12-13 14:14:45,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:14:45,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712597748] [2022-12-13 14:14:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:14:45,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:14:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:14:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:14:45,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:14:45,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712597748] [2022-12-13 14:14:45,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712597748] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:14:45,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147115069] [2022-12-13 14:14:45,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:14:45,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:14:45,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:14:45,227 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:14:45,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 14:14:45,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:14:45,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:14:45,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 14:14:45,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:14:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:14:45,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:14:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:14:45,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147115069] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:14:45,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:14:45,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 26 [2022-12-13 14:14:45,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191614181] [2022-12-13 14:14:45,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:14:45,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 14:14:45,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:14:45,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 14:14:45,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-12-13 14:14:45,722 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:14:45,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 1905 transitions, 67938 flow. Second operand has 26 states, 26 states have (on average 62.84615384615385) internal successors, (1634), 26 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 14:14:45,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:14:45,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:14:45,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:14:58,929 INFO L130 PetriNetUnfolder]: 7603/15336 cut-off events. [2022-12-13 14:14:58,929 INFO L131 PetriNetUnfolder]: For 1859899/1859899 co-relation queries the response was YES. [2022-12-13 14:14:59,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213912 conditions, 15336 events. 7603/15336 cut-off events. For 1859899/1859899 co-relation queries the response was YES. Maximal size of possible extension queue 1275. Compared 145339 event pairs, 172 based on Foata normal form. 488/15824 useless extension candidates. Maximal degree in co-relation 212694. Up to 4532 conditions per place. [2022-12-13 14:14:59,176 INFO L137 encePairwiseOnDemand]: 141/149 looper letters, 1230 selfloop transitions, 1470 changer transitions 79/2779 dead transitions. [2022-12-13 14:14:59,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 2779 transitions, 99026 flow [2022-12-13 14:14:59,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 14:14:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-12-13 14:14:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3193 transitions. [2022-12-13 14:14:59,180 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44644854586129756 [2022-12-13 14:14:59,180 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3193 transitions. [2022-12-13 14:14:59,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3193 transitions. [2022-12-13 14:14:59,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:14:59,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3193 transitions. [2022-12-13 14:14:59,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 66.52083333333333) internal successors, (3193), 48 states have internal predecessors, (3193), 0 states have call successors, (0), 0 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 14:14:59,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 149.0) internal successors, (7301), 49 states have internal predecessors, (7301), 0 states have call successors, (0), 0 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 14:14:59,188 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 149.0) internal successors, (7301), 49 states have internal predecessors, (7301), 0 states have call successors, (0), 0 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 14:14:59,188 INFO L175 Difference]: Start difference. First operand has 491 places, 1905 transitions, 67938 flow. Second operand 48 states and 3193 transitions. [2022-12-13 14:14:59,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 2779 transitions, 99026 flow [2022-12-13 14:15:30,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 2779 transitions, 96722 flow, removed 1087 selfloop flow, removed 11 redundant places. [2022-12-13 14:15:30,674 INFO L231 Difference]: Finished difference. Result has 543 places, 2412 transitions, 89842 flow [2022-12-13 14:15:30,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=66215, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=989, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=89842, PETRI_PLACES=543, PETRI_TRANSITIONS=2412} [2022-12-13 14:15:30,676 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 523 predicate places. [2022-12-13 14:15:30,676 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 2412 transitions, 89842 flow [2022-12-13 14:15:30,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.84615384615385) internal successors, (1634), 26 states have internal predecessors, (1634), 0 states have call successors, (0), 0 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 14:15:30,676 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:15:30,676 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:15:30,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 14:15:30,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 14:15:30,877 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:15:30,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:15:30,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1692681436, now seen corresponding path program 23 times [2022-12-13 14:15:30,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:15:30,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333583883] [2022-12-13 14:15:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:15:30,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:15:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:15:31,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:15:31,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:15:31,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333583883] [2022-12-13 14:15:31,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333583883] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:15:31,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293905869] [2022-12-13 14:15:31,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:15:31,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:15:31,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:15:31,029 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:15:31,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 14:15:31,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 14:15:31,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:15:31,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:15:31,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:15:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:15:31,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:15:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:15:31,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293905869] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:15:31,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:15:31,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-12-13 14:15:31,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732243557] [2022-12-13 14:15:31,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:15:31,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 14:15:31,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:15:31,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 14:15:31,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-12-13 14:15:31,456 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:15:31,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 2412 transitions, 89842 flow. Second operand has 26 states, 26 states have (on average 62.57692307692308) internal successors, (1627), 26 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:15:31,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:15:31,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:15:31,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:15:47,981 INFO L130 PetriNetUnfolder]: 8192/16483 cut-off events. [2022-12-13 14:15:47,981 INFO L131 PetriNetUnfolder]: For 1138855/1138855 co-relation queries the response was YES. [2022-12-13 14:15:48,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216942 conditions, 16483 events. 8192/16483 cut-off events. For 1138855/1138855 co-relation queries the response was YES. Maximal size of possible extension queue 1353. Compared 157731 event pairs, 290 based on Foata normal form. 386/16869 useless extension candidates. Maximal degree in co-relation 215898. Up to 5796 conditions per place. [2022-12-13 14:15:48,270 INFO L137 encePairwiseOnDemand]: 142/149 looper letters, 1098 selfloop transitions, 1792 changer transitions 41/2931 dead transitions. [2022-12-13 14:15:48,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 2931 transitions, 111744 flow [2022-12-13 14:15:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 14:15:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 14:15:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2394 transitions. [2022-12-13 14:15:48,273 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4463087248322148 [2022-12-13 14:15:48,273 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2394 transitions. [2022-12-13 14:15:48,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2394 transitions. [2022-12-13 14:15:48,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:15:48,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2394 transitions. [2022-12-13 14:15:48,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 66.5) internal successors, (2394), 36 states have internal predecessors, (2394), 0 states have call successors, (0), 0 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 14:15:48,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 149.0) internal successors, (5513), 37 states have internal predecessors, (5513), 0 states have call successors, (0), 0 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 14:15:48,278 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 149.0) internal successors, (5513), 37 states have internal predecessors, (5513), 0 states have call successors, (0), 0 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 14:15:48,278 INFO L175 Difference]: Start difference. First operand has 543 places, 2412 transitions, 89842 flow. Second operand 36 states and 2394 transitions. [2022-12-13 14:15:48,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 2931 transitions, 111744 flow [2022-12-13 14:16:14,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 2931 transitions, 107156 flow, removed 1158 selfloop flow, removed 26 redundant places. [2022-12-13 14:16:15,019 INFO L231 Difference]: Finished difference. Result has 560 places, 2682 transitions, 102780 flow [2022-12-13 14:16:15,020 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=85661, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=102780, PETRI_PLACES=560, PETRI_TRANSITIONS=2682} [2022-12-13 14:16:15,020 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 540 predicate places. [2022-12-13 14:16:15,020 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 2682 transitions, 102780 flow [2022-12-13 14:16:15,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.57692307692308) internal successors, (1627), 26 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:16:15,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:16:15,021 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:16:15,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 14:16:15,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 14:16:15,221 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:16:15,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:16:15,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1746828118, now seen corresponding path program 24 times [2022-12-13 14:16:15,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:16:15,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140670019] [2022-12-13 14:16:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:16:15,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:16:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:16:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:15,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:16:15,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140670019] [2022-12-13 14:16:15,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140670019] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:16:15,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893528903] [2022-12-13 14:16:15,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:16:15,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:16:15,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:16:15,353 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:16:15,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 14:16:15,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 14:16:15,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:16:15,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:16:15,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:16:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:16:15,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:16:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:16:15,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893528903] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:16:15,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:16:15,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-12-13 14:16:15,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504830468] [2022-12-13 14:16:15,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:16:15,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:16:15,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:16:15,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:16:15,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2022-12-13 14:16:15,744 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:16:15,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 2682 transitions, 102780 flow. Second operand has 24 states, 24 states have (on average 62.833333333333336) internal successors, (1508), 24 states have internal predecessors, (1508), 0 states have call successors, (0), 0 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 14:16:15,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:16:15,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:16:15,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:16:34,036 INFO L130 PetriNetUnfolder]: 8624/17461 cut-off events. [2022-12-13 14:16:34,036 INFO L131 PetriNetUnfolder]: For 1172394/1172394 co-relation queries the response was YES. [2022-12-13 14:16:34,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225973 conditions, 17461 events. 8624/17461 cut-off events. For 1172394/1172394 co-relation queries the response was YES. Maximal size of possible extension queue 1404. Compared 168981 event pairs, 748 based on Foata normal form. 288/17749 useless extension candidates. Maximal degree in co-relation 224656. Up to 14337 conditions per place. [2022-12-13 14:16:34,407 INFO L137 encePairwiseOnDemand]: 142/149 looper letters, 2506 selfloop transitions, 457 changer transitions 9/2972 dead transitions. [2022-12-13 14:16:34,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 2972 transitions, 117490 flow [2022-12-13 14:16:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 14:16:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 14:16:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1398 transitions. [2022-12-13 14:16:34,408 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4467881112176414 [2022-12-13 14:16:34,408 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1398 transitions. [2022-12-13 14:16:34,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1398 transitions. [2022-12-13 14:16:34,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:16:34,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1398 transitions. [2022-12-13 14:16:34,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 66.57142857142857) internal successors, (1398), 21 states have internal predecessors, (1398), 0 states have call successors, (0), 0 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 14:16:34,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 149.0) internal successors, (3278), 22 states have internal predecessors, (3278), 0 states have call successors, (0), 0 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 14:16:34,411 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 149.0) internal successors, (3278), 22 states have internal predecessors, (3278), 0 states have call successors, (0), 0 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 14:16:34,411 INFO L175 Difference]: Start difference. First operand has 560 places, 2682 transitions, 102780 flow. Second operand 21 states and 1398 transitions. [2022-12-13 14:16:34,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 2972 transitions, 117490 flow [2022-12-13 14:17:04,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 2972 transitions, 116746 flow, removed 287 selfloop flow, removed 14 redundant places. [2022-12-13 14:17:04,524 INFO L231 Difference]: Finished difference. Result has 574 places, 2843 transitions, 110354 flow [2022-12-13 14:17:04,525 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=101945, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=110354, PETRI_PLACES=574, PETRI_TRANSITIONS=2843} [2022-12-13 14:17:04,526 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 554 predicate places. [2022-12-13 14:17:04,526 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 2843 transitions, 110354 flow [2022-12-13 14:17:04,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.833333333333336) internal successors, (1508), 24 states have internal predecessors, (1508), 0 states have call successors, (0), 0 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 14:17:04,526 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:17:04,526 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:17:04,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 14:17:04,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 14:17:04,727 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:17:04,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:17:04,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1907742982, now seen corresponding path program 25 times [2022-12-13 14:17:04,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:17:04,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205825779] [2022-12-13 14:17:04,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:17:04,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:17:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:04,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:17:04,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205825779] [2022-12-13 14:17:04,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205825779] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:17:04,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607262690] [2022-12-13 14:17:04,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:17:04,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:17:04,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:17:04,870 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:17:04,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 14:17:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:17:04,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 14:17:04,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:17:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:05,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:17:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:17:05,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607262690] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:17:05,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:17:05,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-12-13 14:17:05,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578491633] [2022-12-13 14:17:05,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:17:05,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 14:17:05,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:17:05,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 14:17:05,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2022-12-13 14:17:05,350 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:17:05,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 2843 transitions, 110354 flow. Second operand has 26 states, 26 states have (on average 62.88461538461539) internal successors, (1635), 26 states have internal predecessors, (1635), 0 states have call successors, (0), 0 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 14:17:05,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:17:05,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:17:05,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:17:29,532 INFO L130 PetriNetUnfolder]: 10288/20577 cut-off events. [2022-12-13 14:17:29,532 INFO L131 PetriNetUnfolder]: For 1371763/1371763 co-relation queries the response was YES. [2022-12-13 14:17:29,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272290 conditions, 20577 events. 10288/20577 cut-off events. For 1371763/1371763 co-relation queries the response was YES. Maximal size of possible extension queue 1664. Compared 201808 event pairs, 111 based on Foata normal form. 44/20621 useless extension candidates. Maximal degree in co-relation 271153. Up to 5438 conditions per place. [2022-12-13 14:17:29,905 INFO L137 encePairwiseOnDemand]: 142/149 looper letters, 648 selfloop transitions, 3008 changer transitions 142/3798 dead transitions. [2022-12-13 14:17:29,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 3798 transitions, 147264 flow [2022-12-13 14:17:29,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 14:17:29,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 14:17:29,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2283 transitions. [2022-12-13 14:17:29,908 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4506514015001974 [2022-12-13 14:17:29,908 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2283 transitions. [2022-12-13 14:17:29,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2283 transitions. [2022-12-13 14:17:29,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:17:29,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2283 transitions. [2022-12-13 14:17:29,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 67.1470588235294) internal successors, (2283), 34 states have internal predecessors, (2283), 0 states have call successors, (0), 0 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 14:17:29,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 149.0) internal successors, (5215), 35 states have internal predecessors, (5215), 0 states have call successors, (0), 0 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 14:17:29,913 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 149.0) internal successors, (5215), 35 states have internal predecessors, (5215), 0 states have call successors, (0), 0 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 14:17:29,913 INFO L175 Difference]: Start difference. First operand has 574 places, 2843 transitions, 110354 flow. Second operand 34 states and 2283 transitions. [2022-12-13 14:17:29,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 3798 transitions, 147264 flow [2022-12-13 14:18:11,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 3798 transitions, 146841 flow, removed 175 selfloop flow, removed 11 redundant places. [2022-12-13 14:18:11,716 INFO L231 Difference]: Finished difference. Result has 601 places, 3333 transitions, 138960 flow [2022-12-13 14:18:11,718 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=109989, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2518, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=138960, PETRI_PLACES=601, PETRI_TRANSITIONS=3333} [2022-12-13 14:18:11,718 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 581 predicate places. [2022-12-13 14:18:11,718 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 3333 transitions, 138960 flow [2022-12-13 14:18:11,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.88461538461539) internal successors, (1635), 26 states have internal predecessors, (1635), 0 states have call successors, (0), 0 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 14:18:11,718 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:18:11,718 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:18:11,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 14:18:11,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:18:11,919 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:18:11,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:18:11,921 INFO L85 PathProgramCache]: Analyzing trace with hash -591729899, now seen corresponding path program 26 times [2022-12-13 14:18:11,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:18:11,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682842468] [2022-12-13 14:18:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:18:11,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:18:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:18:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:18:12,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:18:12,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682842468] [2022-12-13 14:18:12,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682842468] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:18:12,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739589011] [2022-12-13 14:18:12,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:18:12,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:18:12,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:18:12,075 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:18:12,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 14:18:12,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:18:12,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:18:12,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 14:18:12,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:18:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:18:12,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:18:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:18:12,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739589011] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:18:12,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:18:12,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 13 [2022-12-13 14:18:12,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945813305] [2022-12-13 14:18:12,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:18:12,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 14:18:12,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:18:12,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 14:18:12,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-12-13 14:18:12,444 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 149 [2022-12-13 14:18:12,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 3333 transitions, 138960 flow. Second operand has 15 states, 15 states have (on average 72.33333333333333) internal successors, (1085), 15 states have internal predecessors, (1085), 0 states have call successors, (0), 0 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 14:18:12,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:18:12,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 149 [2022-12-13 14:18:12,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:18:49,815 INFO L130 PetriNetUnfolder]: 14148/28074 cut-off events. [2022-12-13 14:18:49,815 INFO L131 PetriNetUnfolder]: For 2182793/2182801 co-relation queries the response was YES. [2022-12-13 14:18:50,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392054 conditions, 28074 events. 14148/28074 cut-off events. For 2182793/2182801 co-relation queries the response was YES. Maximal size of possible extension queue 2229. Compared 285781 event pairs, 1159 based on Foata normal form. 14/28081 useless extension candidates. Maximal degree in co-relation 390845. Up to 11143 conditions per place. [2022-12-13 14:18:50,429 INFO L137 encePairwiseOnDemand]: 145/149 looper letters, 2256 selfloop transitions, 2469 changer transitions 151/4888 dead transitions. [2022-12-13 14:18:50,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 4888 transitions, 206254 flow [2022-12-13 14:18:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:18:50,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 14:18:50,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 558 transitions. [2022-12-13 14:18:50,430 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5349952061361457 [2022-12-13 14:18:50,430 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 558 transitions. [2022-12-13 14:18:50,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 558 transitions. [2022-12-13 14:18:50,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:18:50,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 558 transitions. [2022-12-13 14:18:50,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 states have internal predecessors, (558), 0 states have call successors, (0), 0 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 14:18:50,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 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 14:18:50,432 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 149.0) internal successors, (1192), 8 states have internal predecessors, (1192), 0 states have call successors, (0), 0 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 14:18:50,432 INFO L175 Difference]: Start difference. First operand has 601 places, 3333 transitions, 138960 flow. Second operand 7 states and 558 transitions. [2022-12-13 14:18:50,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 4888 transitions, 206254 flow [2022-12-13 14:20:06,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 4888 transitions, 203008 flow, removed 1572 selfloop flow, removed 11 redundant places. [2022-12-13 14:20:06,537 INFO L231 Difference]: Finished difference. Result has 601 places, 4427 transitions, 194613 flow [2022-12-13 14:20:06,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=137100, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=864, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=194613, PETRI_PLACES=601, PETRI_TRANSITIONS=4427} [2022-12-13 14:20:06,539 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 581 predicate places. [2022-12-13 14:20:06,539 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 4427 transitions, 194613 flow [2022-12-13 14:20:06,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 72.33333333333333) internal successors, (1085), 15 states have internal predecessors, (1085), 0 states have call successors, (0), 0 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 14:20:06,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:20:06,539 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:20:06,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 14:20:06,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 14:20:06,740 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:20:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:20:06,741 INFO L85 PathProgramCache]: Analyzing trace with hash 604645514, now seen corresponding path program 27 times [2022-12-13 14:20:06,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:20:06,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980715820] [2022-12-13 14:20:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:20:06,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:20:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:20:06,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:20:06,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980715820] [2022-12-13 14:20:06,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980715820] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:20:06,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857483017] [2022-12-13 14:20:06,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:20:06,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:20:06,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:20:06,889 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:20:06,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 14:20:06,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 14:20:06,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:20:06,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 14:20:06,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:20:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:20:07,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:20:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:20:07,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857483017] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:20:07,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:20:07,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-12-13 14:20:07,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3667965] [2022-12-13 14:20:07,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:20:07,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 14:20:07,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:20:07,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 14:20:07,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-12-13 14:20:07,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:20:07,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 4427 transitions, 194613 flow. Second operand has 27 states, 27 states have (on average 62.888888888888886) internal successors, (1698), 27 states have internal predecessors, (1698), 0 states have call successors, (0), 0 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 14:20:07,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:20:07,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:20:07,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:21:07,170 INFO L130 PetriNetUnfolder]: 14899/29555 cut-off events. [2022-12-13 14:21:07,170 INFO L131 PetriNetUnfolder]: For 2363086/2363086 co-relation queries the response was YES. [2022-12-13 14:21:07,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426768 conditions, 29555 events. 14899/29555 cut-off events. For 2363086/2363086 co-relation queries the response was YES. Maximal size of possible extension queue 2369. Compared 302367 event pairs, 156 based on Foata normal form. 44/29599 useless extension candidates. Maximal degree in co-relation 425441. Up to 8883 conditions per place. [2022-12-13 14:21:07,840 INFO L137 encePairwiseOnDemand]: 141/149 looper letters, 704 selfloop transitions, 4232 changer transitions 82/5018 dead transitions. [2022-12-13 14:21:07,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 5018 transitions, 222314 flow [2022-12-13 14:21:07,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 14:21:07,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-13 14:21:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2542 transitions. [2022-12-13 14:21:07,842 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4489579653832568 [2022-12-13 14:21:07,843 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2542 transitions. [2022-12-13 14:21:07,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2542 transitions. [2022-12-13 14:21:07,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:21:07,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2542 transitions. [2022-12-13 14:21:07,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 66.89473684210526) internal successors, (2542), 38 states have internal predecessors, (2542), 0 states have call successors, (0), 0 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 14:21:07,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 149.0) internal successors, (5811), 39 states have internal predecessors, (5811), 0 states have call successors, (0), 0 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 14:21:07,848 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 149.0) internal successors, (5811), 39 states have internal predecessors, (5811), 0 states have call successors, (0), 0 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 14:21:07,848 INFO L175 Difference]: Start difference. First operand has 601 places, 4427 transitions, 194613 flow. Second operand 38 states and 2542 transitions. [2022-12-13 14:21:07,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 5018 transitions, 222314 flow [2022-12-13 14:22:37,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 637 places, 5018 transitions, 220797 flow, removed 730 selfloop flow, removed 1 redundant places. [2022-12-13 14:22:37,684 INFO L231 Difference]: Finished difference. Result has 648 places, 4705 transitions, 219988 flow [2022-12-13 14:22:37,686 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=193167, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3953, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=219988, PETRI_PLACES=648, PETRI_TRANSITIONS=4705} [2022-12-13 14:22:37,686 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 628 predicate places. [2022-12-13 14:22:37,686 INFO L495 AbstractCegarLoop]: Abstraction has has 648 places, 4705 transitions, 219988 flow [2022-12-13 14:22:37,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 62.888888888888886) internal successors, (1698), 27 states have internal predecessors, (1698), 0 states have call successors, (0), 0 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 14:22:37,686 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:22:37,686 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:22:37,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 14:22:37,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:22:37,888 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:22:37,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:22:37,889 INFO L85 PathProgramCache]: Analyzing trace with hash 882549558, now seen corresponding path program 28 times [2022-12-13 14:22:37,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:22:37,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318007900] [2022-12-13 14:22:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:22:37,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:22:37,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:22:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:22:38,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:22:38,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318007900] [2022-12-13 14:22:38,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318007900] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:22:38,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405736483] [2022-12-13 14:22:38,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:22:38,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:22:38,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:22:38,036 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:22:38,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 14:22:38,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:22:38,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:22:38,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 14:22:38,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:22:38,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:22:38,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:22:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:22:38,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405736483] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:22:38,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:22:38,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-12-13 14:22:38,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483192275] [2022-12-13 14:22:38,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:22:38,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 14:22:38,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:22:38,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 14:22:38,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-12-13 14:22:38,515 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:22:38,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 648 places, 4705 transitions, 219988 flow. Second operand has 26 states, 26 states have (on average 62.88461538461539) internal successors, (1635), 26 states have internal predecessors, (1635), 0 states have call successors, (0), 0 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 14:22:38,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:22:38,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:22:38,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:23:48,653 INFO L130 PetriNetUnfolder]: 17023/33677 cut-off events. [2022-12-13 14:23:48,653 INFO L131 PetriNetUnfolder]: For 3066211/3066211 co-relation queries the response was YES. [2022-12-13 14:23:49,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509505 conditions, 33677 events. 17023/33677 cut-off events. For 3066211/3066211 co-relation queries the response was YES. Maximal size of possible extension queue 2742. Compared 350530 event pairs, 480 based on Foata normal form. 82/33759 useless extension candidates. Maximal degree in co-relation 508160. Up to 12766 conditions per place. [2022-12-13 14:23:49,447 INFO L137 encePairwiseOnDemand]: 141/149 looper letters, 2771 selfloop transitions, 2949 changer transitions 64/5784 dead transitions. [2022-12-13 14:23:49,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 693 places, 5784 transitions, 272159 flow [2022-12-13 14:23:49,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 14:23:49,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-12-13 14:23:49,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3062 transitions. [2022-12-13 14:23:49,450 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4467464254449956 [2022-12-13 14:23:49,450 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3062 transitions. [2022-12-13 14:23:49,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3062 transitions. [2022-12-13 14:23:49,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:23:49,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3062 transitions. [2022-12-13 14:23:49,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 66.56521739130434) internal successors, (3062), 46 states have internal predecessors, (3062), 0 states have call successors, (0), 0 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 14:23:49,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 149.0) internal successors, (7003), 47 states have internal predecessors, (7003), 0 states have call successors, (0), 0 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 14:23:49,457 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 149.0) internal successors, (7003), 47 states have internal predecessors, (7003), 0 states have call successors, (0), 0 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 14:23:49,457 INFO L175 Difference]: Start difference. First operand has 648 places, 4705 transitions, 219988 flow. Second operand 46 states and 3062 transitions. [2022-12-13 14:23:49,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 693 places, 5784 transitions, 272159 flow [2022-12-13 14:25:54,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 5784 transitions, 271544 flow, removed 207 selfloop flow, removed 13 redundant places. [2022-12-13 14:25:54,750 INFO L231 Difference]: Finished difference. Result has 684 places, 5354 transitions, 261581 flow [2022-12-13 14:25:54,752 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=219375, PETRI_DIFFERENCE_MINUEND_PLACES=635, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1965, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=261581, PETRI_PLACES=684, PETRI_TRANSITIONS=5354} [2022-12-13 14:25:54,752 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 664 predicate places. [2022-12-13 14:25:54,752 INFO L495 AbstractCegarLoop]: Abstraction has has 684 places, 5354 transitions, 261581 flow [2022-12-13 14:25:54,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.88461538461539) internal successors, (1635), 26 states have internal predecessors, (1635), 0 states have call successors, (0), 0 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 14:25:54,752 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:25:54,753 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:25:54,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 14:25:54,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:25:54,954 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:25:54,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:25:54,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2032899578, now seen corresponding path program 29 times [2022-12-13 14:25:54,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:25:54,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580990327] [2022-12-13 14:25:54,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:25:54,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:25:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:25:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:25:55,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:25:55,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580990327] [2022-12-13 14:25:55,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580990327] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:25:55,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258084408] [2022-12-13 14:25:55,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:25:55,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:25:55,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:25:55,094 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:25:55,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35ca1b1-1c45-456b-985f-2e1cb8595205/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 14:25:55,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 14:25:55,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:25:55,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:25:55,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:25:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:25:55,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:25:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:25:55,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258084408] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:25:55,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:25:55,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-12-13 14:25:55,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569829312] [2022-12-13 14:25:55,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:25:55,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 14:25:55,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:25:55,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 14:25:55,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-12-13 14:25:55,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 149 [2022-12-13 14:25:55,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 5354 transitions, 261581 flow. Second operand has 25 states, 25 states have (on average 62.6) internal successors, (1565), 25 states have internal predecessors, (1565), 0 states have call successors, (0), 0 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 14:25:55,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:25:55,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 149 [2022-12-13 14:25:55,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand