./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS --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 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- 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-4e7fbc6 [2022-11-23 03:16:39,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:16:39,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:16:39,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:16:39,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:16:39,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:16:39,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:16:39,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:16:39,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:16:39,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:16:39,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:16:39,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:16:39,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:16:39,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:16:39,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:16:39,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:16:39,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:16:39,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:16:39,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:16:39,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:16:39,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:16:39,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:16:39,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:16:39,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:16:39,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:16:39,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:16:39,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:16:39,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:16:39,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:16:39,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:16:39,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:16:39,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:16:39,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:16:39,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:16:39,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:16:39,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:16:39,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:16:39,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:16:39,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:16:39,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:16:39,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:16:39,293 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 03:16:39,323 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:16:39,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:16:39,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:16:39,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:16:39,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:16:39,330 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:16:39,331 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:16:39,331 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:16:39,331 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:16:39,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:16:39,331 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:16:39,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:16:39,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:16:39,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:16:39,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:16:39,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:16:39,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:16:39,333 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:16:39,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:16:39,333 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:16:39,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:16:39,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:16:39,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:16:39,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:16:39,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:16:39,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:16:39,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:16:39,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:16:39,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:16:39,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:16:39,344 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:16:39,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:16:39,344 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:16:39,345 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:16:39,345 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_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2022-11-23 03:16:39,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:16:39,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:16:39,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:16:39,722 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:16:39,722 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:16:39,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/pthread/stack_longer-2.i [2022-11-23 03:16:42,925 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:16:43,221 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:16:43,229 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/sv-benchmarks/c/pthread/stack_longer-2.i [2022-11-23 03:16:43,249 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/data/2c1e80f2f/cb2b9242524749268b34efa21fc9353e/FLAG88b8843ce [2022-11-23 03:16:43,269 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/data/2c1e80f2f/cb2b9242524749268b34efa21fc9353e [2022-11-23 03:16:43,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:16:43,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:16:43,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:16:43,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:16:43,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:16:43,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:16:43" (1/1) ... [2022-11-23 03:16:43,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c51a0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:43, skipping insertion in model container [2022-11-23 03:16:43,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:16:43" (1/1) ... [2022-11-23 03:16:43,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:16:43,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:16:43,899 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_212e601f-6a30-4501-bf67-904117c5cda3/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2022-11-23 03:16:43,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:16:43,961 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:16:44,031 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_212e601f-6a30-4501-bf67-904117c5cda3/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2022-11-23 03:16:44,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:16:44,102 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:16:44,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:44 WrapperNode [2022-11-23 03:16:44,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:16:44,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:16:44,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:16:44,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:16:44,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:44" (1/1) ... [2022-11-23 03:16:44,129 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:44" (1/1) ... [2022-11-23 03:16:44,157 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2022-11-23 03:16:44,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:16:44,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:16:44,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:16:44,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:16:44,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:44" (1/1) ... [2022-11-23 03:16:44,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:44" (1/1) ... [2022-11-23 03:16:44,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:44" (1/1) ... [2022-11-23 03:16:44,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:44" (1/1) ... [2022-11-23 03:16:44,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:44" (1/1) ... [2022-11-23 03:16:44,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:44" (1/1) ... [2022-11-23 03:16:44,216 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:44" (1/1) ... [2022-11-23 03:16:44,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:44" (1/1) ... [2022-11-23 03:16:44,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:16:44,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:16:44,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:16:44,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:16:44,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:44" (1/1) ... [2022-11-23 03:16:44,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:16:44,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:16:44,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:16:44,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:16:44,309 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-23 03:16:44,310 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-23 03:16:44,310 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-23 03:16:44,310 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-23 03:16:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:16:44,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:16:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:16:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:16:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-23 03:16:44,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:16:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:16:44,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:16:44,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:16:44,315 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:16:44,480 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:16:44,482 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:16:44,901 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:16:44,911 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:16:44,912 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 03:16:44,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:16:44 BoogieIcfgContainer [2022-11-23 03:16:44,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:16:44,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:16:44,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:16:44,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:16:44,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:16:43" (1/3) ... [2022-11-23 03:16:44,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f0057b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:16:44, skipping insertion in model container [2022-11-23 03:16:44,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:16:44" (2/3) ... [2022-11-23 03:16:44,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f0057b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:16:44, skipping insertion in model container [2022-11-23 03:16:44,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:16:44" (3/3) ... [2022-11-23 03:16:44,932 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2022-11-23 03:16:44,941 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 03:16:44,953 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:16:44,953 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 03:16:44,953 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:16:45,091 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 03:16:45,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 170 transitions, 356 flow [2022-11-23 03:16:45,242 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2022-11-23 03:16:45,242 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:16:45,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 408 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-11-23 03:16:45,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 170 transitions, 356 flow [2022-11-23 03:16:45,255 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 158 transitions, 325 flow [2022-11-23 03:16:45,259 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:16:45,277 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 158 transitions, 325 flow [2022-11-23 03:16:45,280 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 158 transitions, 325 flow [2022-11-23 03:16:45,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 158 transitions, 325 flow [2022-11-23 03:16:45,327 INFO L130 PetriNetUnfolder]: 10/158 cut-off events. [2022-11-23 03:16:45,328 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 03:16:45,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 158 events. 10/158 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 323 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-11-23 03:16:45,336 INFO L119 LiptonReduction]: Number of co-enabled transitions 8324 [2022-11-23 03:16:50,349 INFO L134 LiptonReduction]: Checked pairs total: 10315 [2022-11-23 03:16:50,349 INFO L136 LiptonReduction]: Total number of compositions: 151 [2022-11-23 03:16:50,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:16:50,390 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;@6d714b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:16:50,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-23 03:16:50,401 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2022-11-23 03:16:50,401 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 03:16:50,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:50,403 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 03:16:50,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:16:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:50,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1233761464, now seen corresponding path program 1 times [2022-11-23 03:16:50,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:50,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501313920] [2022-11-23 03:16:50,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:50,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:50,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:50,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501313920] [2022-11-23 03:16:50,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501313920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:50,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:50,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:16:50,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678764846] [2022-11-23 03:16:50,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:50,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:16:50,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:50,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:16:50,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:16:50,823 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 321 [2022-11-23 03:16:50,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:50,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:50,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 321 [2022-11-23 03:16:50,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:51,067 INFO L130 PetriNetUnfolder]: 539/918 cut-off events. [2022-11-23 03:16:51,067 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-11-23 03:16:51,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 918 events. 539/918 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3445 event pairs, 227 based on Foata normal form. 20/748 useless extension candidates. Maximal degree in co-relation 1680. Up to 573 conditions per place. [2022-11-23 03:16:51,075 INFO L137 encePairwiseOnDemand]: 316/321 looper letters, 46 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2022-11-23 03:16:51,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 51 transitions, 215 flow [2022-11-23 03:16:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:16:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:16:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 507 transitions. [2022-11-23 03:16:51,092 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5264797507788161 [2022-11-23 03:16:51,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 507 transitions. [2022-11-23 03:16:51,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 507 transitions. [2022-11-23 03:16:51,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:51,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 507 transitions. [2022-11-23 03:16:51,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:51,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:51,109 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:51,111 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 3 states and 507 transitions. [2022-11-23 03:16:51,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 51 transitions, 215 flow [2022-11-23 03:16:51,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 03:16:51,118 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2022-11-23 03:16:51,120 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2022-11-23 03:16:51,124 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2022-11-23 03:16:51,124 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2022-11-23 03:16:51,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:51,125 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:51,125 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:16:51,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:16:51,125 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:16:51,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:51,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2019811899, now seen corresponding path program 1 times [2022-11-23 03:16:51,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:51,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068355295] [2022-11-23 03:16:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:51,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:51,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:51,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068355295] [2022-11-23 03:16:51,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068355295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:51,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:51,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:16:51,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010902386] [2022-11-23 03:16:51,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:51,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:16:51,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:51,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:16:51,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:16:51,301 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 321 [2022-11-23 03:16:51,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:51,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:51,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 321 [2022-11-23 03:16:51,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:51,488 INFO L130 PetriNetUnfolder]: 593/1022 cut-off events. [2022-11-23 03:16:51,489 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2022-11-23 03:16:51,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 1022 events. 593/1022 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4459 event pairs, 271 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 1916. Up to 877 conditions per place. [2022-11-23 03:16:51,495 INFO L137 encePairwiseOnDemand]: 318/321 looper letters, 45 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2022-11-23 03:16:51,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 222 flow [2022-11-23 03:16:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:16:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:16:51,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 513 transitions. [2022-11-23 03:16:51,499 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5327102803738317 [2022-11-23 03:16:51,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 513 transitions. [2022-11-23 03:16:51,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 513 transitions. [2022-11-23 03:16:51,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:51,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 513 transitions. [2022-11-23 03:16:51,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:51,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:51,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:51,505 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 3 states and 513 transitions. [2022-11-23 03:16:51,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 222 flow [2022-11-23 03:16:51,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:16:51,508 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 97 flow [2022-11-23 03:16:51,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2022-11-23 03:16:51,509 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2022-11-23 03:16:51,509 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 97 flow [2022-11-23 03:16:51,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:51,510 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:51,510 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:16:51,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:16:51,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:16:51,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:51,512 INFO L85 PathProgramCache]: Analyzing trace with hash 277526988, now seen corresponding path program 1 times [2022-11-23 03:16:51,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:51,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296916992] [2022-11-23 03:16:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:51,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:51,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:51,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296916992] [2022-11-23 03:16:51,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296916992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:16:51,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285457129] [2022-11-23 03:16:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:51,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:16:51,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:16:51,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:16:51,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:16:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:51,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:16:51,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:16:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:51,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:16:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:51,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285457129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:16:51,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:16:51,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-23 03:16:51,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719476180] [2022-11-23 03:16:51,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:16:51,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:16:51,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:51,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:16:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:16:52,024 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 321 [2022-11-23 03:16:52,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 97 flow. Second operand has 10 states, 10 states have (on average 151.4) internal successors, (1514), 10 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:52,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:52,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 321 [2022-11-23 03:16:52,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:52,743 INFO L130 PetriNetUnfolder]: 1619/2654 cut-off events. [2022-11-23 03:16:52,743 INFO L131 PetriNetUnfolder]: For 840/840 co-relation queries the response was YES. [2022-11-23 03:16:52,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6125 conditions, 2654 events. 1619/2654 cut-off events. For 840/840 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 12082 event pairs, 246 based on Foata normal form. 82/2392 useless extension candidates. Maximal degree in co-relation 5686. Up to 795 conditions per place. [2022-11-23 03:16:52,760 INFO L137 encePairwiseOnDemand]: 313/321 looper letters, 155 selfloop transitions, 26 changer transitions 3/184 dead transitions. [2022-11-23 03:16:52,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 184 transitions, 855 flow [2022-11-23 03:16:52,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:16:52,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 03:16:52,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1963 transitions. [2022-11-23 03:16:52,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5096053997923157 [2022-11-23 03:16:52,766 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1963 transitions. [2022-11-23 03:16:52,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1963 transitions. [2022-11-23 03:16:52,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:52,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1963 transitions. [2022-11-23 03:16:52,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 163.58333333333334) internal successors, (1963), 12 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:52,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 321.0) internal successors, (4173), 13 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:52,782 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 321.0) internal successors, (4173), 13 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:52,782 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 97 flow. Second operand 12 states and 1963 transitions. [2022-11-23 03:16:52,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 184 transitions, 855 flow [2022-11-23 03:16:52,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 184 transitions, 840 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:16:52,795 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 309 flow [2022-11-23 03:16:52,796 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=309, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2022-11-23 03:16:52,797 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2022-11-23 03:16:52,798 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 309 flow [2022-11-23 03:16:52,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.4) internal successors, (1514), 10 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:52,801 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:52,801 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:16:52,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 03:16:53,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-23 03:16:53,011 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:16:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:53,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1094569775, now seen corresponding path program 1 times [2022-11-23 03:16:53,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:53,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228083289] [2022-11-23 03:16:53,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:53,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:53,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:53,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228083289] [2022-11-23 03:16:53,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228083289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:53,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:53,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:16:53,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861334888] [2022-11-23 03:16:53,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:53,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:16:53,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:53,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:16:53,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:16:53,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 321 [2022-11-23 03:16:53,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:53,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:53,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 321 [2022-11-23 03:16:53,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:53,389 INFO L130 PetriNetUnfolder]: 512/977 cut-off events. [2022-11-23 03:16:53,389 INFO L131 PetriNetUnfolder]: For 560/560 co-relation queries the response was YES. [2022-11-23 03:16:53,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 977 events. 512/977 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4144 event pairs, 98 based on Foata normal form. 0/889 useless extension candidates. Maximal degree in co-relation 2360. Up to 670 conditions per place. [2022-11-23 03:16:53,396 INFO L137 encePairwiseOnDemand]: 316/321 looper letters, 42 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2022-11-23 03:16:53,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 342 flow [2022-11-23 03:16:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:16:53,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:16:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2022-11-23 03:16:53,399 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5192107995846313 [2022-11-23 03:16:53,399 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2022-11-23 03:16:53,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2022-11-23 03:16:53,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:53,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2022-11-23 03:16:53,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:53,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:53,405 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:53,405 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 309 flow. Second operand 3 states and 500 transitions. [2022-11-23 03:16:53,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 342 flow [2022-11-23 03:16:53,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 321 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-11-23 03:16:53,413 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 216 flow [2022-11-23 03:16:53,413 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2022-11-23 03:16:53,414 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2022-11-23 03:16:53,414 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 216 flow [2022-11-23 03:16:53,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:53,414 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:53,415 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:16:53,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:16:53,415 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:16:53,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:53,416 INFO L85 PathProgramCache]: Analyzing trace with hash 289562230, now seen corresponding path program 1 times [2022-11-23 03:16:53,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:53,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716658062] [2022-11-23 03:16:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:53,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:53,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:53,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716658062] [2022-11-23 03:16:53,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716658062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:53,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:53,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:16:53,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463981706] [2022-11-23 03:16:53,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:53,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:16:53,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:53,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:16:53,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:16:53,511 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 321 [2022-11-23 03:16:53,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:53,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:53,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 321 [2022-11-23 03:16:53,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:53,704 INFO L130 PetriNetUnfolder]: 575/1096 cut-off events. [2022-11-23 03:16:53,704 INFO L131 PetriNetUnfolder]: For 445/445 co-relation queries the response was YES. [2022-11-23 03:16:53,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2810 conditions, 1096 events. 575/1096 cut-off events. For 445/445 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4617 event pairs, 353 based on Foata normal form. 24/1120 useless extension candidates. Maximal degree in co-relation 2270. Up to 773 conditions per place. [2022-11-23 03:16:53,711 INFO L137 encePairwiseOnDemand]: 315/321 looper letters, 50 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2022-11-23 03:16:53,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 367 flow [2022-11-23 03:16:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:16:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:16:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2022-11-23 03:16:53,713 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5244029075804777 [2022-11-23 03:16:53,713 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2022-11-23 03:16:53,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2022-11-23 03:16:53,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:53,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2022-11-23 03:16:53,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:53,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:53,718 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:53,718 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 216 flow. Second operand 3 states and 505 transitions. [2022-11-23 03:16:53,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 367 flow [2022-11-23 03:16:53,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:16:53,723 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 248 flow [2022-11-23 03:16:53,723 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2022-11-23 03:16:53,724 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2022-11-23 03:16:53,724 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 248 flow [2022-11-23 03:16:53,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:53,724 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:53,724 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:16:53,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 03:16:53,725 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:16:53,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:53,725 INFO L85 PathProgramCache]: Analyzing trace with hash 895018887, now seen corresponding path program 1 times [2022-11-23 03:16:53,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:53,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758932902] [2022-11-23 03:16:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:53,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:53,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:54,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:54,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758932902] [2022-11-23 03:16:54,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758932902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:54,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:54,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-23 03:16:54,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132426595] [2022-11-23 03:16:54,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:54,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 03:16:54,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:54,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 03:16:54,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:16:55,050 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 321 [2022-11-23 03:16:55,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 248 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:55,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:55,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 321 [2022-11-23 03:16:55,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:55,917 INFO L130 PetriNetUnfolder]: 844/1612 cut-off events. [2022-11-23 03:16:55,917 INFO L131 PetriNetUnfolder]: For 1177/1177 co-relation queries the response was YES. [2022-11-23 03:16:55,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4119 conditions, 1612 events. 844/1612 cut-off events. For 1177/1177 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7818 event pairs, 249 based on Foata normal form. 0/1589 useless extension candidates. Maximal degree in co-relation 2456. Up to 886 conditions per place. [2022-11-23 03:16:55,927 INFO L137 encePairwiseOnDemand]: 311/321 looper letters, 89 selfloop transitions, 11 changer transitions 13/122 dead transitions. [2022-11-23 03:16:55,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 122 transitions, 717 flow [2022-11-23 03:16:55,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 03:16:55,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 03:16:55,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1343 transitions. [2022-11-23 03:16:55,932 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4648667358947733 [2022-11-23 03:16:55,932 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1343 transitions. [2022-11-23 03:16:55,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1343 transitions. [2022-11-23 03:16:55,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:55,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1343 transitions. [2022-11-23 03:16:55,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 149.22222222222223) internal successors, (1343), 9 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:55,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:55,943 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:55,943 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 248 flow. Second operand 9 states and 1343 transitions. [2022-11-23 03:16:55,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 122 transitions, 717 flow [2022-11-23 03:16:55,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 122 transitions, 677 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-11-23 03:16:55,952 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 310 flow [2022-11-23 03:16:55,953 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=310, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2022-11-23 03:16:55,955 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2022-11-23 03:16:55,956 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 310 flow [2022-11-23 03:16:55,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:55,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:55,959 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:16:55,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 03:16:55,959 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:16:55,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:55,959 INFO L85 PathProgramCache]: Analyzing trace with hash -372561305, now seen corresponding path program 2 times [2022-11-23 03:16:55,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:55,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128320486] [2022-11-23 03:16:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:55,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:57,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:57,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128320486] [2022-11-23 03:16:57,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128320486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:57,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:16:57,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-23 03:16:57,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618612347] [2022-11-23 03:16:57,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:57,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 03:16:57,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:57,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 03:16:57,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:16:57,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 321 [2022-11-23 03:16:57,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 310 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:57,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:57,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 321 [2022-11-23 03:16:57,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:58,707 INFO L130 PetriNetUnfolder]: 1096/2088 cut-off events. [2022-11-23 03:16:58,708 INFO L131 PetriNetUnfolder]: For 1258/1258 co-relation queries the response was YES. [2022-11-23 03:16:58,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5608 conditions, 2088 events. 1096/2088 cut-off events. For 1258/1258 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10747 event pairs, 301 based on Foata normal form. 0/2059 useless extension candidates. Maximal degree in co-relation 3995. Up to 839 conditions per place. [2022-11-23 03:16:58,722 INFO L137 encePairwiseOnDemand]: 312/321 looper letters, 89 selfloop transitions, 16 changer transitions 13/127 dead transitions. [2022-11-23 03:16:58,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 127 transitions, 784 flow [2022-11-23 03:16:58,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 03:16:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 03:16:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1343 transitions. [2022-11-23 03:16:58,727 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4648667358947733 [2022-11-23 03:16:58,727 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1343 transitions. [2022-11-23 03:16:58,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1343 transitions. [2022-11-23 03:16:58,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:58,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1343 transitions. [2022-11-23 03:16:58,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 149.22222222222223) internal successors, (1343), 9 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:58,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:58,737 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 321.0) internal successors, (3210), 10 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:58,737 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 310 flow. Second operand 9 states and 1343 transitions. [2022-11-23 03:16:58,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 127 transitions, 784 flow [2022-11-23 03:16:58,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 127 transitions, 784 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:16:58,747 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 406 flow [2022-11-23 03:16:58,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=406, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2022-11-23 03:16:58,748 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 41 predicate places. [2022-11-23 03:16:58,749 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 406 flow [2022-11-23 03:16:58,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:58,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:58,750 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:16:58,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 03:16:58,750 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:16:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:58,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1617108449, now seen corresponding path program 1 times [2022-11-23 03:16:58,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:58,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060220150] [2022-11-23 03:16:58,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:58,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:16:58,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:16:58,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060220150] [2022-11-23 03:16:58,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060220150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:16:58,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527957292] [2022-11-23 03:16:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:58,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:16:58,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:16:58,883 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:16:58,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:16:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:16:59,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:16:59,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:16:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:16:59,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:16:59,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527957292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:16:59,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:16:59,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-23 03:16:59,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483102949] [2022-11-23 03:16:59,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:16:59,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:16:59,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:16:59,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:16:59,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:16:59,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 321 [2022-11-23 03:16:59,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 406 flow. Second operand has 6 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:59,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:16:59,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 321 [2022-11-23 03:16:59,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:16:59,607 INFO L130 PetriNetUnfolder]: 1190/2211 cut-off events. [2022-11-23 03:16:59,607 INFO L131 PetriNetUnfolder]: For 1984/1984 co-relation queries the response was YES. [2022-11-23 03:16:59,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6321 conditions, 2211 events. 1190/2211 cut-off events. For 1984/1984 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 10850 event pairs, 493 based on Foata normal form. 34/2225 useless extension candidates. Maximal degree in co-relation 4719. Up to 933 conditions per place. [2022-11-23 03:16:59,624 INFO L137 encePairwiseOnDemand]: 313/321 looper letters, 101 selfloop transitions, 16 changer transitions 0/117 dead transitions. [2022-11-23 03:16:59,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 862 flow [2022-11-23 03:16:59,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:16:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:16:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 960 transitions. [2022-11-23 03:16:59,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4984423676012461 [2022-11-23 03:16:59,627 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 960 transitions. [2022-11-23 03:16:59,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 960 transitions. [2022-11-23 03:16:59,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:16:59,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 960 transitions. [2022-11-23 03:16:59,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:59,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 321.0) internal successors, (2247), 7 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:59,635 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 321.0) internal successors, (2247), 7 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:59,635 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 406 flow. Second operand 6 states and 960 transitions. [2022-11-23 03:16:59,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 862 flow [2022-11-23 03:16:59,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 834 flow, removed 11 selfloop flow, removed 3 redundant places. [2022-11-23 03:16:59,649 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 507 flow [2022-11-23 03:16:59,650 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=507, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2022-11-23 03:16:59,650 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2022-11-23 03:16:59,650 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 507 flow [2022-11-23 03:16:59,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:16:59,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:16:59,651 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 03:16:59,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:16:59,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:16:59,857 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:16:59,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:16:59,858 INFO L85 PathProgramCache]: Analyzing trace with hash 221800012, now seen corresponding path program 2 times [2022-11-23 03:16:59,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:16:59,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303730952] [2022-11-23 03:16:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:16:59,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:16:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:17:00,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:17:00,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303730952] [2022-11-23 03:17:00,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303730952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:17:00,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801422280] [2022-11-23 03:17:00,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:17:00,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:17:00,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:17:00,178 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:17:00,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:17:00,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:17:00,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:17:00,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:17:00,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:17:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:17:00,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:17:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:17:00,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801422280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:17:00,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:17:00,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-11-23 03:17:00,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839101209] [2022-11-23 03:17:00,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:17:00,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 03:17:00,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:17:00,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 03:17:00,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-11-23 03:17:00,706 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 321 [2022-11-23 03:17:00,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 507 flow. Second operand has 20 states, 20 states have (on average 148.3) internal successors, (2966), 20 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:00,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:17:00,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 321 [2022-11-23 03:17:00,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:17:01,672 INFO L130 PetriNetUnfolder]: 1638/3035 cut-off events. [2022-11-23 03:17:01,673 INFO L131 PetriNetUnfolder]: For 3939/3939 co-relation queries the response was YES. [2022-11-23 03:17:01,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9050 conditions, 3035 events. 1638/3035 cut-off events. For 3939/3939 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 13961 event pairs, 352 based on Foata normal form. 32/3047 useless extension candidates. Maximal degree in co-relation 7670. Up to 936 conditions per place. [2022-11-23 03:17:01,696 INFO L137 encePairwiseOnDemand]: 313/321 looper letters, 214 selfloop transitions, 45 changer transitions 6/265 dead transitions. [2022-11-23 03:17:01,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 265 transitions, 1820 flow [2022-11-23 03:17:01,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 03:17:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-23 03:17:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3285 transitions. [2022-11-23 03:17:01,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48731642189586116 [2022-11-23 03:17:01,706 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3285 transitions. [2022-11-23 03:17:01,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3285 transitions. [2022-11-23 03:17:01,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:17:01,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3285 transitions. [2022-11-23 03:17:01,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 156.42857142857142) internal successors, (3285), 21 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:01,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 321.0) internal successors, (7062), 22 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:01,728 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 321.0) internal successors, (7062), 22 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:01,728 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 507 flow. Second operand 21 states and 3285 transitions. [2022-11-23 03:17:01,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 265 transitions, 1820 flow [2022-11-23 03:17:01,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 265 transitions, 1816 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-23 03:17:01,745 INFO L231 Difference]: Finished difference. Result has 111 places, 98 transitions, 888 flow [2022-11-23 03:17:01,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=888, PETRI_PLACES=111, PETRI_TRANSITIONS=98} [2022-11-23 03:17:01,746 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 77 predicate places. [2022-11-23 03:17:01,747 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 98 transitions, 888 flow [2022-11-23 03:17:01,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 148.3) internal successors, (2966), 20 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:01,748 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:17:01,748 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:17:01,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:17:01,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:17:01,955 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:17:01,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:17:01,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1206111711, now seen corresponding path program 3 times [2022-11-23 03:17:01,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:17:01,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069010684] [2022-11-23 03:17:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:17:01,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:17:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:17:02,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:17:02,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069010684] [2022-11-23 03:17:02,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069010684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:17:02,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:17:02,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-23 03:17:02,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745756442] [2022-11-23 03:17:02,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:17:02,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:17:02,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:17:02,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:17:02,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:17:04,306 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 321 [2022-11-23 03:17:04,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 98 transitions, 888 flow. Second operand has 15 states, 15 states have (on average 131.86666666666667) internal successors, (1978), 15 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:04,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:17:04,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 321 [2022-11-23 03:17:04,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:17:06,967 INFO L130 PetriNetUnfolder]: 2655/4959 cut-off events. [2022-11-23 03:17:06,967 INFO L131 PetriNetUnfolder]: For 9601/9601 co-relation queries the response was YES. [2022-11-23 03:17:07,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16702 conditions, 4959 events. 2655/4959 cut-off events. For 9601/9601 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 26222 event pairs, 670 based on Foata normal form. 0/4931 useless extension candidates. Maximal degree in co-relation 15140. Up to 1528 conditions per place. [2022-11-23 03:17:07,028 INFO L137 encePairwiseOnDemand]: 303/321 looper letters, 140 selfloop transitions, 131 changer transitions 4/285 dead transitions. [2022-11-23 03:17:07,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 285 transitions, 2535 flow [2022-11-23 03:17:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 03:17:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-23 03:17:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3669 transitions. [2022-11-23 03:17:07,041 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42332987192800275 [2022-11-23 03:17:07,041 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3669 transitions. [2022-11-23 03:17:07,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3669 transitions. [2022-11-23 03:17:07,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:17:07,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3669 transitions. [2022-11-23 03:17:07,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 135.88888888888889) internal successors, (3669), 27 states have internal predecessors, (3669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:07,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 321.0) internal successors, (8988), 28 states have internal predecessors, (8988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:07,072 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 321.0) internal successors, (8988), 28 states have internal predecessors, (8988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:07,072 INFO L175 Difference]: Start difference. First operand has 111 places, 98 transitions, 888 flow. Second operand 27 states and 3669 transitions. [2022-11-23 03:17:07,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 285 transitions, 2535 flow [2022-11-23 03:17:07,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 285 transitions, 2320 flow, removed 78 selfloop flow, removed 8 redundant places. [2022-11-23 03:17:07,124 INFO L231 Difference]: Finished difference. Result has 135 places, 191 transitions, 1927 flow [2022-11-23 03:17:07,125 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1927, PETRI_PLACES=135, PETRI_TRANSITIONS=191} [2022-11-23 03:17:07,126 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 101 predicate places. [2022-11-23 03:17:07,126 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 191 transitions, 1927 flow [2022-11-23 03:17:07,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 131.86666666666667) internal successors, (1978), 15 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:07,128 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:17:07,128 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:17:07,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 03:17:07,128 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:17:07,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:17:07,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1077365291, now seen corresponding path program 4 times [2022-11-23 03:17:07,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:17:07,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345059492] [2022-11-23 03:17:07,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:17:07,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:17:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:17:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:17:08,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:17:08,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345059492] [2022-11-23 03:17:08,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345059492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:17:08,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276762226] [2022-11-23 03:17:08,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:17:08,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:17:08,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:17:08,207 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:17:08,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:17:08,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:17:08,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:17:08,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-23 03:17:08,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:17:08,440 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-23 03:17:08,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-11-23 03:17:09,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-23 03:17:09,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 54 [2022-11-23 03:17:09,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 46 [2022-11-23 03:17:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:17:23,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:17:24,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:17:24,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-23 03:17:24,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:17:24,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-23 03:17:24,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-23 03:17:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:17:24,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276762226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:17:24,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:17:24,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 44 [2022-11-23 03:17:24,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866776484] [2022-11-23 03:17:24,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:17:24,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-23 03:17:24,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:17:24,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-23 03:17:24,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1894, Unknown=10, NotChecked=0, Total=2070 [2022-11-23 03:17:32,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 321 [2022-11-23 03:17:32,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 191 transitions, 1927 flow. Second operand has 46 states, 46 states have (on average 115.82608695652173) internal successors, (5328), 46 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:32,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:17:32,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 321 [2022-11-23 03:17:32,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:17:38,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:17:40,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:17:42,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:17:44,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:17:45,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:17:57,791 INFO L130 PetriNetUnfolder]: 3432/6372 cut-off events. [2022-11-23 03:17:57,791 INFO L131 PetriNetUnfolder]: For 15891/15891 co-relation queries the response was YES. [2022-11-23 03:17:57,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23527 conditions, 6372 events. 3432/6372 cut-off events. For 15891/15891 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 35707 event pairs, 542 based on Foata normal form. 54/6389 useless extension candidates. Maximal degree in co-relation 19378. Up to 1562 conditions per place. [2022-11-23 03:17:57,856 INFO L137 encePairwiseOnDemand]: 303/321 looper letters, 277 selfloop transitions, 247 changer transitions 15/539 dead transitions. [2022-11-23 03:17:57,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 539 transitions, 4788 flow [2022-11-23 03:17:57,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-23 03:17:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-23 03:17:57,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 7320 transitions. [2022-11-23 03:17:57,874 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37383177570093457 [2022-11-23 03:17:57,875 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 7320 transitions. [2022-11-23 03:17:57,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 7320 transitions. [2022-11-23 03:17:57,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:17:57,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 7320 transitions. [2022-11-23 03:17:57,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 120.0) internal successors, (7320), 61 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:57,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 321.0) internal successors, (19902), 62 states have internal predecessors, (19902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:57,924 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 321.0) internal successors, (19902), 62 states have internal predecessors, (19902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:57,924 INFO L175 Difference]: Start difference. First operand has 135 places, 191 transitions, 1927 flow. Second operand 61 states and 7320 transitions. [2022-11-23 03:17:57,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 539 transitions, 4788 flow [2022-11-23 03:17:58,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 539 transitions, 4567 flow, removed 60 selfloop flow, removed 6 redundant places. [2022-11-23 03:17:58,036 INFO L231 Difference]: Finished difference. Result has 200 places, 293 transitions, 3436 flow [2022-11-23 03:17:58,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=3436, PETRI_PLACES=200, PETRI_TRANSITIONS=293} [2022-11-23 03:17:58,038 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 166 predicate places. [2022-11-23 03:17:58,038 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 293 transitions, 3436 flow [2022-11-23 03:17:58,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 115.82608695652173) internal successors, (5328), 46 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:17:58,040 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:17:58,040 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:17:58,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 03:17:58,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 03:17:58,247 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:17:58,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:17:58,247 INFO L85 PathProgramCache]: Analyzing trace with hash 200563527, now seen corresponding path program 1 times [2022-11-23 03:17:58,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:17:58,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460734170] [2022-11-23 03:17:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:17:58,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:17:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:18:02,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:18:02,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460734170] [2022-11-23 03:18:02,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460734170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:18:02,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229329860] [2022-11-23 03:18:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:18:02,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:18:02,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:18:02,331 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:18:02,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 03:18:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:18:02,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-23 03:18:02,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:18:03,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-23 03:18:03,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:18:03,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 43 [2022-11-23 03:18:05,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 46 [2022-11-23 03:18:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:18:13,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:18:15,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-23 03:18:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:18:15,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229329860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:18:15,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:18:15,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 59 [2022-11-23 03:18:15,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021051812] [2022-11-23 03:18:15,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:18:15,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-23 03:18:15,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:18:15,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-23 03:18:15,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=3226, Unknown=1, NotChecked=0, Total=3540 [2022-11-23 03:18:36,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-23 03:18:40,002 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 321 [2022-11-23 03:18:40,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 293 transitions, 3436 flow. Second operand has 60 states, 60 states have (on average 122.8) internal successors, (7368), 60 states have internal predecessors, (7368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:18:40,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:18:40,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 321 [2022-11-23 03:18:40,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:18:56,828 WARN L233 SmtUtils]: Spent 9.82s on a formula simplification. DAG size of input: 129 DAG size of output: 128 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:19:07,282 WARN L233 SmtUtils]: Spent 6.80s on a formula simplification. DAG size of input: 117 DAG size of output: 116 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:19:28,467 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 244 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:20:24,388 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 145 DAG size of output: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:21:00,866 INFO L130 PetriNetUnfolder]: 6636/12282 cut-off events. [2022-11-23 03:21:00,866 INFO L131 PetriNetUnfolder]: For 35842/35842 co-relation queries the response was YES. [2022-11-23 03:21:00,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49174 conditions, 12282 events. 6636/12282 cut-off events. For 35842/35842 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 79756 event pairs, 1334 based on Foata normal form. 12/12233 useless extension candidates. Maximal degree in co-relation 43885. Up to 2182 conditions per place. [2022-11-23 03:21:01,005 INFO L137 encePairwiseOnDemand]: 303/321 looper letters, 446 selfloop transitions, 439 changer transitions 47/932 dead transitions. [2022-11-23 03:21:01,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 932 transitions, 9632 flow [2022-11-23 03:21:01,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-23 03:21:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-11-23 03:21:01,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 11066 transitions. [2022-11-23 03:21:01,024 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3962473591864504 [2022-11-23 03:21:01,024 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 11066 transitions. [2022-11-23 03:21:01,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 11066 transitions. [2022-11-23 03:21:01,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:01,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 11066 transitions. [2022-11-23 03:21:01,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 127.19540229885058) internal successors, (11066), 87 states have internal predecessors, (11066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:01,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 321.0) internal successors, (28248), 88 states have internal predecessors, (28248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:01,087 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 321.0) internal successors, (28248), 88 states have internal predecessors, (28248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:01,087 INFO L175 Difference]: Start difference. First operand has 200 places, 293 transitions, 3436 flow. Second operand 87 states and 11066 transitions. [2022-11-23 03:21:01,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 932 transitions, 9632 flow [2022-11-23 03:21:01,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 932 transitions, 8788 flow, removed 310 selfloop flow, removed 12 redundant places. [2022-11-23 03:21:01,652 INFO L231 Difference]: Finished difference. Result has 290 places, 529 transitions, 6563 flow [2022-11-23 03:21:01,653 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=2974, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=6563, PETRI_PLACES=290, PETRI_TRANSITIONS=529} [2022-11-23 03:21:01,653 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 256 predicate places. [2022-11-23 03:21:01,653 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 529 transitions, 6563 flow [2022-11-23 03:21:01,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 122.8) internal successors, (7368), 60 states have internal predecessors, (7368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:01,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:01,657 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:01,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:01,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 03:21:01,863 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:21:01,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:01,863 INFO L85 PathProgramCache]: Analyzing trace with hash 964706787, now seen corresponding path program 2 times [2022-11-23 03:21:01,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:01,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117944985] [2022-11-23 03:21:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:01,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:04,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:04,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117944985] [2022-11-23 03:21:04,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117944985] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:04,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361523480] [2022-11-23 03:21:04,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:21:04,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:04,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:04,286 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:04,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 03:21:04,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:21:04,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:04,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 03:21:04,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:04,572 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-23 03:21:04,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-11-23 03:21:05,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-23 03:21:05,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 58 [2022-11-23 03:21:06,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:21:06,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 43 [2022-11-23 03:21:07,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 46 [2022-11-23 03:21:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:27,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:28,889 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_498 Int) (|v_t1Thread1of1ForFork1_push_#t~ret34#1_105| Int) (v_ArrVal_497 (Array Int Int))) (or (< |v_t1Thread1of1ForFork1_push_#t~ret34#1_105| c_~top~0) (not (= 4294967294 (mod (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_497))) (store .cse0 |c_t1Thread1of1ForFork1_push_~stack#1.base| (store (select .cse0 |c_t1Thread1of1ForFork1_push_~stack#1.base|) (+ (* |v_t1Thread1of1ForFork1_push_#t~ret34#1_105| 4) |c_t1Thread1of1ForFork1_push_~stack#1.offset|) v_ArrVal_498))) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296))))) is different from false [2022-11-23 03:21:28,928 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_498 Int) (|v_t1Thread1of1ForFork1_push_#t~ret34#1_105| Int) (|v_t1Thread1of1ForFork1_push_~stack#1.offset_64| Int) (v_ArrVal_497 (Array Int Int))) (or (not (= (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_497) |c_~#arr~0.base|) (+ (* |v_t1Thread1of1ForFork1_push_#t~ret34#1_105| 4) |v_t1Thread1of1ForFork1_push_~stack#1.offset_64|) v_ArrVal_498) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296) 4294967294)) (< |v_t1Thread1of1ForFork1_push_#t~ret34#1_105| c_~top~0) (< |v_t1Thread1of1ForFork1_push_~stack#1.offset_64| |c_~#arr~0.offset|))) is different from false [2022-11-23 03:21:28,991 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_498 Int) (|v_t1Thread1of1ForFork1_push_#t~ret34#1_105| Int) (|v_t1Thread1of1ForFork1_push_~stack#1.offset_64| Int) (v_ArrVal_497 (Array Int Int))) (or (not (= (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_497) |c_~#arr~0.base|) (+ (* |v_t1Thread1of1ForFork1_push_#t~ret34#1_105| 4) |v_t1Thread1of1ForFork1_push_~stack#1.offset_64|) v_ArrVal_498) (+ (* |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 4) |c_~#arr~0.offset|)) 4294967296) 4294967294)) (< |v_t1Thread1of1ForFork1_push_~stack#1.offset_64| |c_~#arr~0.offset|) (< |v_t1Thread1of1ForFork1_push_#t~ret34#1_105| (+ |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 1)))) is different from false [2022-11-23 03:21:29,255 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:21:29,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-11-23 03:21:29,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:21:29,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 67 [2022-11-23 03:21:29,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:21:29,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-11-23 03:21:29,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-11-23 03:21:29,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:21:29,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:21:29,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2022-11-23 03:21:31,887 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-23 03:21:31,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361523480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:31,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:31,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 64 [2022-11-23 03:21:31,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756063269] [2022-11-23 03:21:31,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:31,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-23 03:21:31,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:31,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-23 03:21:31,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=3665, Unknown=16, NotChecked=372, Total=4290 [2022-11-23 03:21:32,033 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 321 [2022-11-23 03:21:32,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 529 transitions, 6563 flow. Second operand has 66 states, 66 states have (on average 105.63636363636364) internal successors, (6972), 66 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:32,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:32,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 321 [2022-11-23 03:21:32,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:23:35,236 INFO L130 PetriNetUnfolder]: 14570/26713 cut-off events. [2022-11-23 03:23:35,236 INFO L131 PetriNetUnfolder]: For 85637/85637 co-relation queries the response was YES. [2022-11-23 03:23:35,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112323 conditions, 26713 events. 14570/26713 cut-off events. For 85637/85637 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 196051 event pairs, 2288 based on Foata normal form. 12/26575 useless extension candidates. Maximal degree in co-relation 98864. Up to 4799 conditions per place. [2022-11-23 03:23:35,724 INFO L137 encePairwiseOnDemand]: 296/321 looper letters, 421 selfloop transitions, 1178 changer transitions 21/1620 dead transitions. [2022-11-23 03:23:35,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 1620 transitions, 20673 flow [2022-11-23 03:23:35,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-23 03:23:35,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2022-11-23 03:23:35,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 11377 transitions. [2022-11-23 03:23:35,759 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34079199616582795 [2022-11-23 03:23:35,759 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 11377 transitions. [2022-11-23 03:23:35,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 11377 transitions. [2022-11-23 03:23:35,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:23:35,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 11377 transitions. [2022-11-23 03:23:35,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 109.39423076923077) internal successors, (11377), 104 states have internal predecessors, (11377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:35,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 321.0) internal successors, (33705), 105 states have internal predecessors, (33705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:35,844 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 321.0) internal successors, (33705), 105 states have internal predecessors, (33705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:35,845 INFO L175 Difference]: Start difference. First operand has 290 places, 529 transitions, 6563 flow. Second operand 104 states and 11377 transitions. [2022-11-23 03:23:35,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 1620 transitions, 20673 flow [2022-11-23 03:23:36,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1620 transitions, 19635 flow, removed 97 selfloop flow, removed 13 redundant places. [2022-11-23 03:23:36,874 INFO L231 Difference]: Finished difference. Result has 398 places, 1272 transitions, 18569 flow [2022-11-23 03:23:36,875 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=6137, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=18569, PETRI_PLACES=398, PETRI_TRANSITIONS=1272} [2022-11-23 03:23:36,876 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 364 predicate places. [2022-11-23 03:23:36,876 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 1272 transitions, 18569 flow [2022-11-23 03:23:36,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 105.63636363636364) internal successors, (6972), 66 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:36,877 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:23:36,877 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:23:36,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 03:23:37,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 03:23:37,078 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:23:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:37,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2093254889, now seen corresponding path program 3 times [2022-11-23 03:23:37,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:23:37,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074355660] [2022-11-23 03:23:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:37,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:23:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:39,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:23:39,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074355660] [2022-11-23 03:23:39,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074355660] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:23:39,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207352870] [2022-11-23 03:23:39,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:23:39,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:23:39,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:23:39,295 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:23:39,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 03:23:39,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 03:23:39,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:23:39,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-23 03:23:39,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:39,667 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-23 03:23:39,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-11-23 03:23:40,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-23 03:23:41,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:23:41,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-11-23 03:23:41,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2022-11-23 03:23:42,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 46 [2022-11-23 03:24:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:24:05,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:24:06,456 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_570 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_570) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4) (- 8))) 4294967296) 4294967294))) is different from false [2022-11-23 03:24:09,939 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-23 03:24:09,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 60 [2022-11-23 03:24:09,957 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:24:09,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 70 [2022-11-23 03:24:09,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-23 03:24:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-23 03:24:14,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207352870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:24:14,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:24:14,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 65 [2022-11-23 03:24:14,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127668088] [2022-11-23 03:24:14,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:24:14,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-23 03:24:14,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:24:14,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-23 03:24:14,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=3974, Unknown=34, NotChecked=128, Total=4422 [2022-11-23 03:24:15,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 321 [2022-11-23 03:24:15,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 1272 transitions, 18569 flow. Second operand has 67 states, 67 states have (on average 105.56716417910448) internal successors, (7073), 67 states have internal predecessors, (7073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:15,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:24:15,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 321 [2022-11-23 03:24:15,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:24:57,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:25:40,954 INFO L130 PetriNetUnfolder]: 16528/30555 cut-off events. [2022-11-23 03:25:40,954 INFO L131 PetriNetUnfolder]: For 190755/190755 co-relation queries the response was YES. [2022-11-23 03:25:41,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184959 conditions, 30555 events. 16528/30555 cut-off events. For 190755/190755 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 231675 event pairs, 2120 based on Foata normal form. 262/30679 useless extension candidates. Maximal degree in co-relation 163803. Up to 14487 conditions per place. [2022-11-23 03:25:41,492 INFO L137 encePairwiseOnDemand]: 302/321 looper letters, 396 selfloop transitions, 1507 changer transitions 84/1987 dead transitions. [2022-11-23 03:25:41,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 1987 transitions, 30323 flow [2022-11-23 03:25:41,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-23 03:25:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2022-11-23 03:25:41,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 13069 transitions. [2022-11-23 03:25:41,513 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.33927829698857737 [2022-11-23 03:25:41,513 INFO L72 ComplementDD]: Start complementDD. Operand 120 states and 13069 transitions. [2022-11-23 03:25:41,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 13069 transitions. [2022-11-23 03:25:41,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:25:41,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 120 states and 13069 transitions. [2022-11-23 03:25:41,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 121 states, 120 states have (on average 108.90833333333333) internal successors, (13069), 120 states have internal predecessors, (13069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:41,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 121 states, 121 states have (on average 321.0) internal successors, (38841), 121 states have internal predecessors, (38841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:41,573 INFO L81 ComplementDD]: Finished complementDD. Result has 121 states, 121 states have (on average 321.0) internal successors, (38841), 121 states have internal predecessors, (38841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:41,573 INFO L175 Difference]: Start difference. First operand has 398 places, 1272 transitions, 18569 flow. Second operand 120 states and 13069 transitions. [2022-11-23 03:25:41,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 1987 transitions, 30323 flow [2022-11-23 03:25:43,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 1987 transitions, 29091 flow, removed 588 selfloop flow, removed 9 redundant places. [2022-11-23 03:25:43,528 INFO L231 Difference]: Finished difference. Result has 519 places, 1603 transitions, 25939 flow [2022-11-23 03:25:43,529 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=16793, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=120, PETRI_FLOW=25939, PETRI_PLACES=519, PETRI_TRANSITIONS=1603} [2022-11-23 03:25:43,530 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 485 predicate places. [2022-11-23 03:25:43,530 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 1603 transitions, 25939 flow [2022-11-23 03:25:43,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 105.56716417910448) internal successors, (7073), 67 states have internal predecessors, (7073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:43,531 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:25:43,532 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:25:43,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 03:25:43,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:25:43,738 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:25:43,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:25:43,738 INFO L85 PathProgramCache]: Analyzing trace with hash -501444831, now seen corresponding path program 2 times [2022-11-23 03:25:43,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:25:43,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555819359] [2022-11-23 03:25:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:25:43,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:25:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:25:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:25:44,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:25:44,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555819359] [2022-11-23 03:25:44,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555819359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:25:44,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324420795] [2022-11-23 03:25:44,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:25:44,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:25:44,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:25:44,078 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:25:44,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 03:25:44,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:25:44,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:25:44,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:25:44,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:25:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:25:44,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:25:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:25:44,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324420795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:25:44,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:25:44,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2022-11-23 03:25:44,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578258708] [2022-11-23 03:25:44,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:25:44,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 03:25:44,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:25:44,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 03:25:44,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-11-23 03:25:44,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 321 [2022-11-23 03:25:44,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1603 transitions, 25939 flow. Second operand has 22 states, 22 states have (on average 145.04545454545453) internal successors, (3191), 22 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:44,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:25:44,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 321 [2022-11-23 03:25:44,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:26:03,016 INFO L130 PetriNetUnfolder]: 18174/33725 cut-off events. [2022-11-23 03:26:03,017 INFO L131 PetriNetUnfolder]: For 229619/229619 co-relation queries the response was YES. [2022-11-23 03:26:03,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216152 conditions, 33725 events. 18174/33725 cut-off events. For 229619/229619 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 259944 event pairs, 4325 based on Foata normal form. 168/33819 useless extension candidates. Maximal degree in co-relation 194090. Up to 15765 conditions per place. [2022-11-23 03:26:03,674 INFO L137 encePairwiseOnDemand]: 311/321 looper letters, 1465 selfloop transitions, 1083 changer transitions 15/2563 dead transitions. [2022-11-23 03:26:03,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 2563 transitions, 44123 flow [2022-11-23 03:26:03,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 03:26:03,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-23 03:26:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4050 transitions. [2022-11-23 03:26:03,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4672897196261682 [2022-11-23 03:26:03,683 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4050 transitions. [2022-11-23 03:26:03,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4050 transitions. [2022-11-23 03:26:03,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:26:03,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4050 transitions. [2022-11-23 03:26:03,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 150.0) internal successors, (4050), 27 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:03,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 321.0) internal successors, (8988), 28 states have internal predecessors, (8988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:03,706 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 321.0) internal successors, (8988), 28 states have internal predecessors, (8988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:03,706 INFO L175 Difference]: Start difference. First operand has 519 places, 1603 transitions, 25939 flow. Second operand 27 states and 4050 transitions. [2022-11-23 03:26:03,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 2563 transitions, 44123 flow [2022-11-23 03:26:06,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 2563 transitions, 42893 flow, removed 444 selfloop flow, removed 33 redundant places. [2022-11-23 03:26:06,905 INFO L231 Difference]: Finished difference. Result has 518 places, 1764 transitions, 31120 flow [2022-11-23 03:26:06,906 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=24158, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=867, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=31120, PETRI_PLACES=518, PETRI_TRANSITIONS=1764} [2022-11-23 03:26:06,907 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 484 predicate places. [2022-11-23 03:26:06,907 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 1764 transitions, 31120 flow [2022-11-23 03:26:06,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 145.04545454545453) internal successors, (3191), 22 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:06,908 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:26:06,908 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:26:06,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 03:26:07,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 03:26:07,109 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:26:07,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:26:07,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1853510221, now seen corresponding path program 4 times [2022-11-23 03:26:07,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:26:07,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718326346] [2022-11-23 03:26:07,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:26:07,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:26:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:26:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:26:10,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:26:10,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718326346] [2022-11-23 03:26:10,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718326346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:26:10,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72700747] [2022-11-23 03:26:10,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:26:10,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:26:10,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:26:10,127 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:26:10,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 03:26:10,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:26:10,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:26:10,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-23 03:26:10,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:26:10,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-23 03:26:11,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:26:11,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 43 [2022-11-23 03:26:12,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:26:12,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 43 [2022-11-23 03:26:13,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 46 [2022-11-23 03:26:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:26:39,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:26:42,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-23 03:26:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:26:43,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72700747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:26:43,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:26:43,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 23] total 73 [2022-11-23 03:26:43,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691804762] [2022-11-23 03:26:43,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:26:43,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-23 03:26:43,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:26:43,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-23 03:26:43,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=5152, Unknown=2, NotChecked=0, Total=5402 [2022-11-23 03:27:17,032 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 321 [2022-11-23 03:27:17,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 1764 transitions, 31120 flow. Second operand has 74 states, 74 states have (on average 126.06756756756756) internal successors, (9329), 74 states have internal predecessors, (9329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:27:17,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:27:17,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 321 [2022-11-23 03:27:17,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:30:02,649 INFO L130 PetriNetUnfolder]: 29936/55803 cut-off events. [2022-11-23 03:30:02,649 INFO L131 PetriNetUnfolder]: For 424000/424000 co-relation queries the response was YES. [2022-11-23 03:30:03,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369211 conditions, 55803 events. 29936/55803 cut-off events. For 424000/424000 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 453927 event pairs, 4417 based on Foata normal form. 354/56029 useless extension candidates. Maximal degree in co-relation 321702. Up to 26489 conditions per place. [2022-11-23 03:30:03,838 INFO L137 encePairwiseOnDemand]: 302/321 looper letters, 939 selfloop transitions, 2619 changer transitions 111/3669 dead transitions. [2022-11-23 03:30:03,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 3669 transitions, 66181 flow [2022-11-23 03:30:03,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-11-23 03:30:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2022-11-23 03:30:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 22467 transitions. [2022-11-23 03:30:03,868 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40224513911268667 [2022-11-23 03:30:03,868 INFO L72 ComplementDD]: Start complementDD. Operand 174 states and 22467 transitions. [2022-11-23 03:30:03,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 174 states and 22467 transitions. [2022-11-23 03:30:03,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:30:03,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 174 states and 22467 transitions. [2022-11-23 03:30:03,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 175 states, 174 states have (on average 129.1206896551724) internal successors, (22467), 174 states have internal predecessors, (22467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:30:03,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 175 states, 175 states have (on average 321.0) internal successors, (56175), 175 states have internal predecessors, (56175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:30:03,963 INFO L81 ComplementDD]: Finished complementDD. Result has 175 states, 175 states have (on average 321.0) internal successors, (56175), 175 states have internal predecessors, (56175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:30:03,963 INFO L175 Difference]: Start difference. First operand has 518 places, 1764 transitions, 31120 flow. Second operand 174 states and 22467 transitions. [2022-11-23 03:30:03,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 3669 transitions, 66181 flow [2022-11-23 03:30:10,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 680 places, 3669 transitions, 63521 flow, removed 688 selfloop flow, removed 11 redundant places. [2022-11-23 03:30:11,017 INFO L231 Difference]: Finished difference. Result has 699 places, 2886 transitions, 55801 flow [2022-11-23 03:30:11,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=29725, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=174, PETRI_FLOW=55801, PETRI_PLACES=699, PETRI_TRANSITIONS=2886} [2022-11-23 03:30:11,019 INFO L288 CegarLoopForPetriNet]: 34 programPoint places, 665 predicate places. [2022-11-23 03:30:11,020 INFO L495 AbstractCegarLoop]: Abstraction has has 699 places, 2886 transitions, 55801 flow [2022-11-23 03:30:11,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 126.06756756756756) internal successors, (9329), 74 states have internal predecessors, (9329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:30:11,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:30:11,021 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:30:11,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 03:30:11,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 03:30:11,228 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 03:30:11,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:30:11,230 INFO L85 PathProgramCache]: Analyzing trace with hash -249512667, now seen corresponding path program 5 times [2022-11-23 03:30:11,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:30:11,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653413347] [2022-11-23 03:30:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:30:11,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:30:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:30:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:30:14,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:30:14,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653413347] [2022-11-23 03:30:14,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653413347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:30:14,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839584668] [2022-11-23 03:30:14,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:30:14,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:30:14,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:30:14,192 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:30:14,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_212e601f-6a30-4501-bf67-904117c5cda3/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 03:30:14,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 03:30:14,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:30:14,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-23 03:30:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:30:14,435 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 03:30:14,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 03:30:15,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-23 03:30:15,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 54 [2022-11-23 03:30:16,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:30:16,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-11-23 03:30:16,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:30:16,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-11-23 03:30:18,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 46 [2022-11-23 03:30:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:30:40,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:30:43,653 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:30:43,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-23 03:30:43,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:30:43,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-23 03:30:43,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-23 03:30:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:30:44,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839584668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:30:44,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:30:44,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 24] total 75 [2022-11-23 03:30:44,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406773985] [2022-11-23 03:30:44,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:30:44,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-23 03:30:44,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:30:44,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-23 03:30:44,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=5556, Unknown=14, NotChecked=0, Total=5852