./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --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_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/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_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/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_506327a8-e683-4b85-bd83-d0ce965edf18/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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --- 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 04:13:43,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 04:13:43,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 04:13:43,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 04:13:43,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 04:13:43,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 04:13:43,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 04:13:43,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 04:13:43,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 04:13:43,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 04:13:43,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 04:13:43,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 04:13:43,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 04:13:43,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 04:13:43,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 04:13:43,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 04:13:43,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 04:13:43,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 04:13:43,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 04:13:43,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 04:13:43,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 04:13:43,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 04:13:43,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 04:13:43,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 04:13:43,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 04:13:43,385 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 04:13:43,386 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 04:13:43,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 04:13:43,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 04:13:43,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 04:13:43,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 04:13:43,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 04:13:43,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 04:13:43,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 04:13:43,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 04:13:43,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 04:13:43,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 04:13:43,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 04:13:43,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 04:13:43,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 04:13:43,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 04:13:43,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 04:13:43,455 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 04:13:43,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 04:13:43,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 04:13:43,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 04:13:43,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 04:13:43,461 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 04:13:43,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 04:13:43,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 04:13:43,462 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 04:13:43,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 04:13:43,464 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 04:13:43,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 04:13:43,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 04:13:43,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 04:13:43,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 04:13:43,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 04:13:43,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 04:13:43,466 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 04:13:43,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 04:13:43,466 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 04:13:43,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 04:13:43,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 04:13:43,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 04:13:43,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 04:13:43,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 04:13:43,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 04:13:43,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 04:13:43,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 04:13:43,469 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 04:13:43,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 04:13:43,469 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 04:13:43,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 04:13:43,470 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 04:13:43,470 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 04:13:43,470 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_506327a8-e683-4b85-bd83-d0ce965edf18/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2022-11-23 04:13:43,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 04:13:43,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 04:13:43,888 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 04:13:43,890 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 04:13:43,891 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 04:13:43,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-23 04:13:47,275 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 04:13:47,620 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 04:13:47,620 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-23 04:13:47,628 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/data/02ab9d3e0/02c19fee3b2b459ca32aff485a411af4/FLAG61e9035a4 [2022-11-23 04:13:47,645 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/data/02ab9d3e0/02c19fee3b2b459ca32aff485a411af4 [2022-11-23 04:13:47,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 04:13:47,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 04:13:47,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 04:13:47,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 04:13:47,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 04:13:47,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:13:47" (1/1) ... [2022-11-23 04:13:47,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f377c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:47, skipping insertion in model container [2022-11-23 04:13:47,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:13:47" (1/1) ... [2022-11-23 04:13:47,669 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 04:13:47,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 04:13:47,881 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_506327a8-e683-4b85-bd83-d0ce965edf18/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-23 04:13:47,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 04:13:47,905 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 04:13:47,932 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_506327a8-e683-4b85-bd83-d0ce965edf18/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-23 04:13:47,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 04:13:47,954 INFO L208 MainTranslator]: Completed translation [2022-11-23 04:13:47,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:47 WrapperNode [2022-11-23 04:13:47,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 04:13:47,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 04:13:47,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 04:13:47,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 04:13:47,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:47" (1/1) ... [2022-11-23 04:13:47,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:47" (1/1) ... [2022-11-23 04:13:48,000 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 142 [2022-11-23 04:13:48,001 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 04:13:48,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 04:13:48,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 04:13:48,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 04:13:48,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:47" (1/1) ... [2022-11-23 04:13:48,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:47" (1/1) ... [2022-11-23 04:13:48,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:47" (1/1) ... [2022-11-23 04:13:48,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:47" (1/1) ... [2022-11-23 04:13:48,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:47" (1/1) ... [2022-11-23 04:13:48,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:47" (1/1) ... [2022-11-23 04:13:48,033 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:47" (1/1) ... [2022-11-23 04:13:48,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:47" (1/1) ... [2022-11-23 04:13:48,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 04:13:48,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 04:13:48,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 04:13:48,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 04:13:48,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:47" (1/1) ... [2022-11-23 04:13:48,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 04:13:48,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:13:48,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 04:13:48,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 04:13:48,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 04:13:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 04:13:48,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 04:13:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 04:13:48,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 04:13:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 04:13:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 04:13:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 04:13:48,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 04:13:48,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 04:13:48,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 04:13:48,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 04:13:48,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 04:13:48,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 04:13:48,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 04:13:48,150 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 04:13:48,276 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 04:13:48,279 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 04:13:48,691 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 04:13:48,796 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 04:13:48,797 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 04:13:48,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:13:48 BoogieIcfgContainer [2022-11-23 04:13:48,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 04:13:48,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 04:13:48,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 04:13:48,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 04:13:48,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:13:47" (1/3) ... [2022-11-23 04:13:48,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b96793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:13:48, skipping insertion in model container [2022-11-23 04:13:48,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:13:47" (2/3) ... [2022-11-23 04:13:48,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b96793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:13:48, skipping insertion in model container [2022-11-23 04:13:48,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:13:48" (3/3) ... [2022-11-23 04:13:48,811 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2022-11-23 04:13:48,823 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 04:13:48,835 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 04:13:48,835 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 04:13:48,835 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 04:13:48,915 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 04:13:48,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 133 transitions, 282 flow [2022-11-23 04:13:49,045 INFO L130 PetriNetUnfolder]: 11/131 cut-off events. [2022-11-23 04:13:49,046 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 04:13:49,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 11/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-11-23 04:13:49,052 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 133 transitions, 282 flow [2022-11-23 04:13:49,059 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 122 transitions, 256 flow [2022-11-23 04:13:49,063 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 04:13:49,081 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 122 transitions, 256 flow [2022-11-23 04:13:49,085 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 122 transitions, 256 flow [2022-11-23 04:13:49,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 122 transitions, 256 flow [2022-11-23 04:13:49,134 INFO L130 PetriNetUnfolder]: 11/122 cut-off events. [2022-11-23 04:13:49,143 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 04:13:49,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 122 events. 11/122 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-11-23 04:13:49,148 INFO L119 LiptonReduction]: Number of co-enabled transitions 732 [2022-11-23 04:13:55,705 INFO L134 LiptonReduction]: Checked pairs total: 837 [2022-11-23 04:13:55,706 INFO L136 LiptonReduction]: Total number of compositions: 130 [2022-11-23 04:13:55,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 04:13:55,734 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;@3bfb26fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 04:13:55,734 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 04:13:55,741 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2022-11-23 04:13:55,741 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 04:13:55,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:55,742 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:13:55,743 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:13:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:55,749 INFO L85 PathProgramCache]: Analyzing trace with hash -446582098, now seen corresponding path program 1 times [2022-11-23 04:13:55,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:55,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863610150] [2022-11-23 04:13:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:55,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:56,397 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 04:13:56,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:56,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863610150] [2022-11-23 04:13:56,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863610150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:13:56,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:13:56,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 04:13:56,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523511767] [2022-11-23 04:13:56,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:13:56,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:13:56,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:56,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:13:56,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:13:56,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 263 [2022-11-23 04:13:56,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:56,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:56,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 263 [2022-11-23 04:13:56,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:56,599 INFO L130 PetriNetUnfolder]: 64/113 cut-off events. [2022-11-23 04:13:56,600 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-23 04:13:56,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 113 events. 64/113 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 313 event pairs, 20 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 162. Up to 66 conditions per place. [2022-11-23 04:13:56,605 INFO L137 encePairwiseOnDemand]: 260/263 looper letters, 19 selfloop transitions, 2 changer transitions 4/26 dead transitions. [2022-11-23 04:13:56,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2022-11-23 04:13:56,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:13:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:13:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2022-11-23 04:13:56,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47782002534854245 [2022-11-23 04:13:56,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2022-11-23 04:13:56,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2022-11-23 04:13:56,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:56,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2022-11-23 04:13:56,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 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 04:13:56,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 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 04:13:56,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 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 04:13:56,667 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 3 states and 377 transitions. [2022-11-23 04:13:56,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2022-11-23 04:13:56,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 04:13:56,675 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 48 flow [2022-11-23 04:13:56,677 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2022-11-23 04:13:56,682 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2022-11-23 04:13:56,683 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 48 flow [2022-11-23 04:13:56,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:13:56,683 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:56,684 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:13:56,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 04:13:56,684 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:13:56,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:56,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1992880690, now seen corresponding path program 1 times [2022-11-23 04:13:56,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:56,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323921318] [2022-11-23 04:13:56,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:56,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:13:56,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:56,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323921318] [2022-11-23 04:13:56,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323921318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:13:56,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:13:56,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 04:13:56,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226916107] [2022-11-23 04:13:56,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:13:56,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 04:13:56,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:56,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 04:13:56,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 04:13:56,976 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 263 [2022-11-23 04:13:56,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 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 04:13:56,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:56,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 263 [2022-11-23 04:13:56,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:57,057 INFO L130 PetriNetUnfolder]: 48/96 cut-off events. [2022-11-23 04:13:57,057 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-23 04:13:57,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 96 events. 48/96 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 230 event pairs, 15 based on Foata normal form. 6/81 useless extension candidates. Maximal degree in co-relation 123. Up to 66 conditions per place. [2022-11-23 04:13:57,058 INFO L137 encePairwiseOnDemand]: 260/263 looper letters, 16 selfloop transitions, 2 changer transitions 5/24 dead transitions. [2022-11-23 04:13:57,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 110 flow [2022-11-23 04:13:57,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 04:13:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 04:13:57,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2022-11-23 04:13:57,061 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4550063371356147 [2022-11-23 04:13:57,062 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2022-11-23 04:13:57,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2022-11-23 04:13:57,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:57,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2022-11-23 04:13:57,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 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 04:13:57,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 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 04:13:57,067 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 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 04:13:57,068 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 48 flow. Second operand 3 states and 359 transitions. [2022-11-23 04:13:57,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 110 flow [2022-11-23 04:13:57,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:13:57,069 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 58 flow [2022-11-23 04:13:57,070 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2022-11-23 04:13:57,071 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2022-11-23 04:13:57,071 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 58 flow [2022-11-23 04:13:57,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 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 04:13:57,072 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:57,072 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:13:57,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 04:13:57,073 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:13:57,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:57,074 INFO L85 PathProgramCache]: Analyzing trace with hash -527546347, now seen corresponding path program 1 times [2022-11-23 04:13:57,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:57,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313353807] [2022-11-23 04:13:57,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:57,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:57,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:13:57,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:57,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313353807] [2022-11-23 04:13:57,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313353807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 04:13:57,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 04:13:57,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 04:13:57,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515573465] [2022-11-23 04:13:57,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 04:13:57,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 04:13:57,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:13:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 04:13:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 04:13:57,299 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 263 [2022-11-23 04:13:57,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 115.5) internal successors, (462), 4 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 04:13:57,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:13:57,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 263 [2022-11-23 04:13:57,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:13:57,428 INFO L130 PetriNetUnfolder]: 57/126 cut-off events. [2022-11-23 04:13:57,429 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-11-23 04:13:57,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 57/126 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 406 event pairs, 40 based on Foata normal form. 4/126 useless extension candidates. Maximal degree in co-relation 202. Up to 95 conditions per place. [2022-11-23 04:13:57,430 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 16 selfloop transitions, 2 changer transitions 10/29 dead transitions. [2022-11-23 04:13:57,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 140 flow [2022-11-23 04:13:57,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 04:13:57,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 04:13:57,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2022-11-23 04:13:57,433 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4515209125475285 [2022-11-23 04:13:57,433 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2022-11-23 04:13:57,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2022-11-23 04:13:57,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:13:57,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2022-11-23 04:13:57,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 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 04:13:57,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 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 04:13:57,439 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 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 04:13:57,439 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 58 flow. Second operand 4 states and 475 transitions. [2022-11-23 04:13:57,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 140 flow [2022-11-23 04:13:57,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 04:13:57,442 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 70 flow [2022-11-23 04:13:57,442 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2022-11-23 04:13:57,443 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2022-11-23 04:13:57,443 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 70 flow [2022-11-23 04:13:57,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.5) internal successors, (462), 4 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 04:13:57,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:13:57,444 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:13:57,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 04:13:57,445 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:13:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:13:57,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1561421156, now seen corresponding path program 1 times [2022-11-23 04:13:57,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:13:57,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179722343] [2022-11-23 04:13:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:57,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:13:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:13:58,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:13:58,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179722343] [2022-11-23 04:13:58,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179722343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:13:58,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287424644] [2022-11-23 04:13:58,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:13:58,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:13:58,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:13:58,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:13:58,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 04:13:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:13:58,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 04:13:58,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:13:58,754 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 11 treesize of output 7 [2022-11-23 04:13:58,871 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 6 treesize of output 5 [2022-11-23 04:13:58,976 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 6 treesize of output 5 [2022-11-23 04:13:59,164 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 19 treesize of output 7 [2022-11-23 04:13:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:13:59,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:13:59,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:13:59,890 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 63 treesize of output 51 [2022-11-23 04:13:59,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:13:59,918 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 325 treesize of output 305 [2022-11-23 04:13:59,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:13:59,943 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 293 treesize of output 257 [2022-11-23 04:13:59,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:13:59,966 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 245 treesize of output 233 [2022-11-23 04:14:00,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:14:00,308 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 63 treesize of output 51 [2022-11-23 04:14:00,332 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-23 04:14:00,333 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 153 treesize of output 141 [2022-11-23 04:14:00,357 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-23 04:14:00,358 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 137 treesize of output 117 [2022-11-23 04:14:00,375 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-23 04:14:00,376 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 113 treesize of output 105 [2022-11-23 04:14:00,585 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 04:14:00,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287424644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:14:00,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:14:00,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-11-23 04:14:00,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598791078] [2022-11-23 04:14:00,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:14:00,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 04:14:00,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:14:00,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 04:14:00,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=341, Unknown=2, NotChecked=0, Total=462 [2022-11-23 04:14:01,089 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 263 [2022-11-23 04:14:01,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 70 flow. Second operand has 22 states, 22 states have (on average 77.95454545454545) internal successors, (1715), 22 states have internal predecessors, (1715), 0 states have call successors, (0), 0 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 04:14:01,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:14:01,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 263 [2022-11-23 04:14:01,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:14:05,335 INFO L130 PetriNetUnfolder]: 229/449 cut-off events. [2022-11-23 04:14:05,335 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-11-23 04:14:05,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 449 events. 229/449 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1932 event pairs, 30 based on Foata normal form. 3/448 useless extension candidates. Maximal degree in co-relation 1070. Up to 102 conditions per place. [2022-11-23 04:14:05,339 INFO L137 encePairwiseOnDemand]: 255/263 looper letters, 55 selfloop transitions, 24 changer transitions 50/129 dead transitions. [2022-11-23 04:14:05,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 129 transitions, 637 flow [2022-11-23 04:14:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 04:14:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-23 04:14:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1650 transitions. [2022-11-23 04:14:05,350 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31368821292775667 [2022-11-23 04:14:05,350 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1650 transitions. [2022-11-23 04:14:05,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1650 transitions. [2022-11-23 04:14:05,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:14:05,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1650 transitions. [2022-11-23 04:14:05,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 82.5) internal successors, (1650), 20 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:14:05,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 263.0) internal successors, (5523), 21 states have internal predecessors, (5523), 0 states have call successors, (0), 0 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 04:14:05,372 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 263.0) internal successors, (5523), 21 states have internal predecessors, (5523), 0 states have call successors, (0), 0 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 04:14:05,372 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 70 flow. Second operand 20 states and 1650 transitions. [2022-11-23 04:14:05,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 129 transitions, 637 flow [2022-11-23 04:14:05,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 129 transitions, 625 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-23 04:14:05,380 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 248 flow [2022-11-23 04:14:05,380 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=248, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2022-11-23 04:14:05,382 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2022-11-23 04:14:05,383 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 248 flow [2022-11-23 04:14:05,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 77.95454545454545) internal successors, (1715), 22 states have internal predecessors, (1715), 0 states have call successors, (0), 0 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 04:14:05,384 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:14:05,384 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:14:05,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 04:14:05,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:05,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:14:05,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:14:05,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1996781984, now seen corresponding path program 2 times [2022-11-23 04:14:05,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:14:05,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627809957] [2022-11-23 04:14:05,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:14:05,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:14:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:14:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:14:05,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:14:05,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627809957] [2022-11-23 04:14:05,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627809957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:14:05,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220369235] [2022-11-23 04:14:05,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:14:05,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:05,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:14:05,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:14:06,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 04:14:06,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:14:06,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:14:06,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:14:06,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:14:06,220 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 124 treesize of output 92 [2022-11-23 04:14:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:14:06,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:14:06,425 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 136 treesize of output 104 [2022-11-23 04:14:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:14:06,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220369235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:14:06,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:14:06,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 11 [2022-11-23 04:14:06,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187563337] [2022-11-23 04:14:06,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:14:06,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 04:14:06,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:14:06,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 04:14:06,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-23 04:14:06,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 263 [2022-11-23 04:14:06,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 248 flow. Second operand has 12 states, 12 states have (on average 110.16666666666667) internal successors, (1322), 12 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:14:06,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:14:06,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 263 [2022-11-23 04:14:06,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:14:07,066 INFO L130 PetriNetUnfolder]: 341/679 cut-off events. [2022-11-23 04:14:07,067 INFO L131 PetriNetUnfolder]: For 673/675 co-relation queries the response was YES. [2022-11-23 04:14:07,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1999 conditions, 679 events. 341/679 cut-off events. For 673/675 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3370 event pairs, 76 based on Foata normal form. 24/687 useless extension candidates. Maximal degree in co-relation 1704. Up to 163 conditions per place. [2022-11-23 04:14:07,072 INFO L137 encePairwiseOnDemand]: 258/263 looper letters, 56 selfloop transitions, 21 changer transitions 5/86 dead transitions. [2022-11-23 04:14:07,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 86 transitions, 597 flow [2022-11-23 04:14:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 04:14:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 04:14:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1027 transitions. [2022-11-23 04:14:07,077 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43388255175327417 [2022-11-23 04:14:07,077 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1027 transitions. [2022-11-23 04:14:07,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1027 transitions. [2022-11-23 04:14:07,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:14:07,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1027 transitions. [2022-11-23 04:14:07,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.11111111111111) internal successors, (1027), 9 states have internal predecessors, (1027), 0 states have call successors, (0), 0 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 04:14:07,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 263.0) internal successors, (2630), 10 states have internal predecessors, (2630), 0 states have call successors, (0), 0 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 04:14:07,087 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 263.0) internal successors, (2630), 10 states have internal predecessors, (2630), 0 states have call successors, (0), 0 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 04:14:07,087 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 248 flow. Second operand 9 states and 1027 transitions. [2022-11-23 04:14:07,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 86 transitions, 597 flow [2022-11-23 04:14:07,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 573 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-11-23 04:14:07,094 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 361 flow [2022-11-23 04:14:07,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=361, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2022-11-23 04:14:07,095 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2022-11-23 04:14:07,096 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 361 flow [2022-11-23 04:14:07,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 110.16666666666667) internal successors, (1322), 12 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:14:07,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:14:07,097 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:14:07,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 04:14:07,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:07,303 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:14:07,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:14:07,304 INFO L85 PathProgramCache]: Analyzing trace with hash -483408937, now seen corresponding path program 3 times [2022-11-23 04:14:07,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:14:07,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144835042] [2022-11-23 04:14:07,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:14:07,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:14:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:14:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:14:07,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:14:07,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144835042] [2022-11-23 04:14:07,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144835042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:14:07,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537559119] [2022-11-23 04:14:07,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 04:14:07,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:07,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:14:07,564 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:14:07,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 04:14:07,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 04:14:07,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:14:07,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 04:14:07,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:14:07,825 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 124 treesize of output 92 [2022-11-23 04:14:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:14:07,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:14:08,007 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 136 treesize of output 104 [2022-11-23 04:14:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:14:08,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537559119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:14:08,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:14:08,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-23 04:14:08,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040937004] [2022-11-23 04:14:08,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:14:08,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 04:14:08,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:14:08,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 04:14:08,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 04:14:08,342 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 263 [2022-11-23 04:14:08,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 361 flow. Second operand has 12 states, 12 states have (on average 110.41666666666667) internal successors, (1325), 12 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:14:08,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:14:08,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 263 [2022-11-23 04:14:08,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:14:08,608 INFO L130 PetriNetUnfolder]: 229/473 cut-off events. [2022-11-23 04:14:08,609 INFO L131 PetriNetUnfolder]: For 882/884 co-relation queries the response was YES. [2022-11-23 04:14:08,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1559 conditions, 473 events. 229/473 cut-off events. For 882/884 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2220 event pairs, 154 based on Foata normal form. 12/469 useless extension candidates. Maximal degree in co-relation 1523. Up to 389 conditions per place. [2022-11-23 04:14:08,612 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 31 selfloop transitions, 3 changer transitions 19/56 dead transitions. [2022-11-23 04:14:08,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 56 transitions, 439 flow [2022-11-23 04:14:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 04:14:08,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 04:14:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 684 transitions. [2022-11-23 04:14:08,616 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43346007604562736 [2022-11-23 04:14:08,616 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 684 transitions. [2022-11-23 04:14:08,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 684 transitions. [2022-11-23 04:14:08,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:14:08,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 684 transitions. [2022-11-23 04:14:08,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 114.0) internal successors, (684), 6 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 04:14:08,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 263.0) internal successors, (1841), 7 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 04:14:08,624 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 263.0) internal successors, (1841), 7 states have internal predecessors, (1841), 0 states have call successors, (0), 0 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 04:14:08,624 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 361 flow. Second operand 6 states and 684 transitions. [2022-11-23 04:14:08,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 56 transitions, 439 flow [2022-11-23 04:14:08,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 408 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-11-23 04:14:08,630 INFO L231 Difference]: Finished difference. Result has 54 places, 37 transitions, 247 flow [2022-11-23 04:14:08,630 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=247, PETRI_PLACES=54, PETRI_TRANSITIONS=37} [2022-11-23 04:14:08,631 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2022-11-23 04:14:08,631 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 37 transitions, 247 flow [2022-11-23 04:14:08,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 110.41666666666667) internal successors, (1325), 12 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 04:14:08,632 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:14:08,633 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:14:08,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 04:14:08,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:08,840 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:14:08,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:14:08,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1357906211, now seen corresponding path program 4 times [2022-11-23 04:14:08,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:14:08,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038422315] [2022-11-23 04:14:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:14:08,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:14:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:14:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:14:10,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:14:10,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038422315] [2022-11-23 04:14:10,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038422315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:14:10,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064530364] [2022-11-23 04:14:10,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 04:14:10,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:10,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:14:10,968 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:14:10,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 04:14:11,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 04:14:11,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:14:11,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 04:14:11,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:14:11,394 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 23 treesize of output 7 [2022-11-23 04:14:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:14:11,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:14:11,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:14:11,586 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 70 treesize of output 50 [2022-11-23 04:14:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 04:14:11,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064530364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:14:11,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:14:11,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 20 [2022-11-23 04:14:11,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113995520] [2022-11-23 04:14:11,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:14:11,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 04:14:11,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:14:11,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 04:14:11,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-11-23 04:14:13,317 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 263 [2022-11-23 04:14:13,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 37 transitions, 247 flow. Second operand has 22 states, 22 states have (on average 98.22727272727273) internal successors, (2161), 22 states have internal predecessors, (2161), 0 states have call successors, (0), 0 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 04:14:13,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:14:13,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 263 [2022-11-23 04:14:13,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:14:14,727 INFO L130 PetriNetUnfolder]: 313/613 cut-off events. [2022-11-23 04:14:14,727 INFO L131 PetriNetUnfolder]: For 574/574 co-relation queries the response was YES. [2022-11-23 04:14:14,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1833 conditions, 613 events. 313/613 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2822 event pairs, 48 based on Foata normal form. 3/616 useless extension candidates. Maximal degree in co-relation 1802. Up to 174 conditions per place. [2022-11-23 04:14:14,732 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 49 selfloop transitions, 25 changer transitions 44/118 dead transitions. [2022-11-23 04:14:14,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 118 transitions, 758 flow [2022-11-23 04:14:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 04:14:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-23 04:14:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1641 transitions. [2022-11-23 04:14:14,739 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3899714828897338 [2022-11-23 04:14:14,739 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1641 transitions. [2022-11-23 04:14:14,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1641 transitions. [2022-11-23 04:14:14,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:14:14,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1641 transitions. [2022-11-23 04:14:14,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 102.5625) internal successors, (1641), 16 states have internal predecessors, (1641), 0 states have call successors, (0), 0 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 04:14:14,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 263.0) internal successors, (4471), 17 states have internal predecessors, (4471), 0 states have call successors, (0), 0 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 04:14:14,756 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 263.0) internal successors, (4471), 17 states have internal predecessors, (4471), 0 states have call successors, (0), 0 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 04:14:14,756 INFO L175 Difference]: Start difference. First operand has 54 places, 37 transitions, 247 flow. Second operand 16 states and 1641 transitions. [2022-11-23 04:14:14,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 118 transitions, 758 flow [2022-11-23 04:14:14,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 118 transitions, 750 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-11-23 04:14:14,764 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 382 flow [2022-11-23 04:14:14,765 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=382, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2022-11-23 04:14:14,766 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2022-11-23 04:14:14,767 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 382 flow [2022-11-23 04:14:14,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.22727272727273) internal successors, (2161), 22 states have internal predecessors, (2161), 0 states have call successors, (0), 0 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 04:14:14,768 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:14:14,768 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:14:14,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 04:14:14,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 04:14:14,976 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:14:14,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:14:14,976 INFO L85 PathProgramCache]: Analyzing trace with hash -418021832, now seen corresponding path program 5 times [2022-11-23 04:14:14,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:14:14,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368029388] [2022-11-23 04:14:14,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:14:14,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:14:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:14:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:14:16,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:14:16,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368029388] [2022-11-23 04:14:16,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368029388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:14:16,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749424998] [2022-11-23 04:14:16,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 04:14:16,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:16,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:14:16,405 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:14:16,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 04:14:16,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:14:16,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:14:16,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 04:14:16,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:14:17,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:14:17,013 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 48 treesize of output 14 [2022-11-23 04:14:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:14:17,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:14:17,576 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-23 04:14:17,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 226 treesize of output 196 [2022-11-23 04:14:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:14:18,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749424998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:14:18,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:14:18,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 25 [2022-11-23 04:14:18,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643728249] [2022-11-23 04:14:18,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:14:18,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 04:14:18,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:14:18,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 04:14:18,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2022-11-23 04:14:20,181 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 263 [2022-11-23 04:14:20,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 382 flow. Second operand has 27 states, 27 states have (on average 96.92592592592592) internal successors, (2617), 27 states have internal predecessors, (2617), 0 states have call successors, (0), 0 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 04:14:20,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:14:20,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 263 [2022-11-23 04:14:20,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:14:22,617 INFO L130 PetriNetUnfolder]: 661/1251 cut-off events. [2022-11-23 04:14:22,617 INFO L131 PetriNetUnfolder]: For 1890/1890 co-relation queries the response was YES. [2022-11-23 04:14:22,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3956 conditions, 1251 events. 661/1251 cut-off events. For 1890/1890 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6820 event pairs, 100 based on Foata normal form. 6/1257 useless extension candidates. Maximal degree in co-relation 2912. Up to 285 conditions per place. [2022-11-23 04:14:22,626 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 103 selfloop transitions, 47 changer transitions 74/224 dead transitions. [2022-11-23 04:14:22,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 224 transitions, 1557 flow [2022-11-23 04:14:22,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 04:14:22,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-23 04:14:22,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2769 transitions. [2022-11-23 04:14:22,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38994507815800594 [2022-11-23 04:14:22,638 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2769 transitions. [2022-11-23 04:14:22,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2769 transitions. [2022-11-23 04:14:22,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:14:22,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2769 transitions. [2022-11-23 04:14:22,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 102.55555555555556) internal successors, (2769), 27 states have internal predecessors, (2769), 0 states have call successors, (0), 0 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 04:14:22,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 263.0) internal successors, (7364), 28 states have internal predecessors, (7364), 0 states have call successors, (0), 0 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 04:14:22,666 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 263.0) internal successors, (7364), 28 states have internal predecessors, (7364), 0 states have call successors, (0), 0 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 04:14:22,666 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 382 flow. Second operand 27 states and 2769 transitions. [2022-11-23 04:14:22,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 224 transitions, 1557 flow [2022-11-23 04:14:22,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 224 transitions, 1477 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-11-23 04:14:22,678 INFO L231 Difference]: Finished difference. Result has 93 places, 78 transitions, 828 flow [2022-11-23 04:14:22,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=828, PETRI_PLACES=93, PETRI_TRANSITIONS=78} [2022-11-23 04:14:22,682 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 73 predicate places. [2022-11-23 04:14:22,683 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 78 transitions, 828 flow [2022-11-23 04:14:22,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 96.92592592592592) internal successors, (2617), 27 states have internal predecessors, (2617), 0 states have call successors, (0), 0 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 04:14:22,684 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:14:22,684 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:14:22,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 04:14:22,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:22,892 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:14:22,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:14:22,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1941342344, now seen corresponding path program 6 times [2022-11-23 04:14:22,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:14:22,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645534596] [2022-11-23 04:14:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:14:22,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:14:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:14:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:14:24,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:14:24,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645534596] [2022-11-23 04:14:24,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645534596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:14:24,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951647028] [2022-11-23 04:14:24,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 04:14:24,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:24,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:14:24,470 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:14:24,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 04:14:24,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 04:14:24,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:14:24,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-23 04:14:24,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:14:24,902 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 15 treesize of output 11 [2022-11-23 04:14:24,983 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 6 treesize of output 5 [2022-11-23 04:14:25,054 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 6 treesize of output 5 [2022-11-23 04:14:25,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:14:25,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 14 [2022-11-23 04:14:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:14:25,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:14:26,732 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:14:26,732 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 124 treesize of output 88 [2022-11-23 04:14:26,800 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-23 04:14:26,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 271 treesize of output 275 [2022-11-23 04:14:26,854 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-23 04:14:26,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 223 [2022-11-23 04:14:26,908 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-23 04:14:26,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 197 [2022-11-23 04:14:28,112 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:14:28,113 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 124 treesize of output 88 [2022-11-23 04:14:28,146 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-23 04:14:28,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 271 treesize of output 245 [2022-11-23 04:14:28,182 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-23 04:14:28,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 193 [2022-11-23 04:14:28,216 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-23 04:14:28,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 167 [2022-11-23 04:14:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:14:28,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951647028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:14:28,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:14:28,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2022-11-23 04:14:28,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769202511] [2022-11-23 04:14:28,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:14:28,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 04:14:28,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:14:28,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 04:14:28,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=713, Unknown=4, NotChecked=0, Total=930 [2022-11-23 04:14:31,007 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 263 [2022-11-23 04:14:31,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 78 transitions, 828 flow. Second operand has 31 states, 31 states have (on average 77.64516129032258) internal successors, (2407), 31 states have internal predecessors, (2407), 0 states have call successors, (0), 0 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 04:14:31,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:14:31,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 263 [2022-11-23 04:14:31,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:14:37,234 INFO L130 PetriNetUnfolder]: 974/1836 cut-off events. [2022-11-23 04:14:37,234 INFO L131 PetriNetUnfolder]: For 8816/8816 co-relation queries the response was YES. [2022-11-23 04:14:37,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7461 conditions, 1836 events. 974/1836 cut-off events. For 8816/8816 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 10966 event pairs, 96 based on Foata normal form. 8/1844 useless extension candidates. Maximal degree in co-relation 7183. Up to 461 conditions per place. [2022-11-23 04:14:37,257 INFO L137 encePairwiseOnDemand]: 255/263 looper letters, 98 selfloop transitions, 69 changer transitions 98/265 dead transitions. [2022-11-23 04:14:37,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 265 transitions, 2253 flow [2022-11-23 04:14:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-23 04:14:37,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-23 04:14:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2804 transitions. [2022-11-23 04:14:37,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31357638112279135 [2022-11-23 04:14:37,270 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2804 transitions. [2022-11-23 04:14:37,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2804 transitions. [2022-11-23 04:14:37,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:14:37,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2804 transitions. [2022-11-23 04:14:37,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 82.47058823529412) internal successors, (2804), 34 states have internal predecessors, (2804), 0 states have call successors, (0), 0 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 04:14:37,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 263.0) internal successors, (9205), 35 states have internal predecessors, (9205), 0 states have call successors, (0), 0 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 04:14:37,324 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 263.0) internal successors, (9205), 35 states have internal predecessors, (9205), 0 states have call successors, (0), 0 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 04:14:37,324 INFO L175 Difference]: Start difference. First operand has 93 places, 78 transitions, 828 flow. Second operand 34 states and 2804 transitions. [2022-11-23 04:14:37,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 265 transitions, 2253 flow [2022-11-23 04:14:37,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 265 transitions, 2117 flow, removed 64 selfloop flow, removed 4 redundant places. [2022-11-23 04:14:37,380 INFO L231 Difference]: Finished difference. Result has 132 places, 105 transitions, 1261 flow [2022-11-23 04:14:37,381 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1261, PETRI_PLACES=132, PETRI_TRANSITIONS=105} [2022-11-23 04:14:37,382 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 112 predicate places. [2022-11-23 04:14:37,382 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 105 transitions, 1261 flow [2022-11-23 04:14:37,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 77.64516129032258) internal successors, (2407), 31 states have internal predecessors, (2407), 0 states have call successors, (0), 0 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 04:14:37,383 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:14:37,383 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:14:37,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 04:14:37,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:37,590 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:14:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:14:37,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1202898536, now seen corresponding path program 7 times [2022-11-23 04:14:37,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:14:37,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141753676] [2022-11-23 04:14:37,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:14:37,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:14:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:14:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 04:14:37,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:14:37,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141753676] [2022-11-23 04:14:37,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141753676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:14:37,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164147280] [2022-11-23 04:14:37,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 04:14:37,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:37,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:14:37,951 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:14:37,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 04:14:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:14:38,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 04:14:38,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:14:38,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:14:38,281 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 170 treesize of output 120 [2022-11-23 04:14:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 04:14:38,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:14:38,687 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 04:14:38,688 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 193 treesize of output 145 [2022-11-23 04:14:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 04:14:38,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164147280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:14:38,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:14:38,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 6] total 17 [2022-11-23 04:14:38,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108499782] [2022-11-23 04:14:38,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:14:38,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 04:14:38,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:14:38,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 04:14:38,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-23 04:14:39,293 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 263 [2022-11-23 04:14:39,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 105 transitions, 1261 flow. Second operand has 18 states, 18 states have (on average 102.66666666666667) internal successors, (1848), 18 states have internal predecessors, (1848), 0 states have call successors, (0), 0 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 04:14:39,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:14:39,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 263 [2022-11-23 04:14:39,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:14:40,682 INFO L130 PetriNetUnfolder]: 1538/2914 cut-off events. [2022-11-23 04:14:40,682 INFO L131 PetriNetUnfolder]: For 25162/25162 co-relation queries the response was YES. [2022-11-23 04:14:40,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13795 conditions, 2914 events. 1538/2914 cut-off events. For 25162/25162 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19256 event pairs, 245 based on Foata normal form. 52/2966 useless extension candidates. Maximal degree in co-relation 12973. Up to 647 conditions per place. [2022-11-23 04:14:40,716 INFO L137 encePairwiseOnDemand]: 258/263 looper letters, 108 selfloop transitions, 87 changer transitions 25/220 dead transitions. [2022-11-23 04:14:40,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 220 transitions, 2678 flow [2022-11-23 04:14:40,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 04:14:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-23 04:14:40,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1826 transitions. [2022-11-23 04:14:40,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.408409751733393 [2022-11-23 04:14:40,724 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1826 transitions. [2022-11-23 04:14:40,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1826 transitions. [2022-11-23 04:14:40,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:14:40,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1826 transitions. [2022-11-23 04:14:40,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 107.41176470588235) internal successors, (1826), 17 states have internal predecessors, (1826), 0 states have call successors, (0), 0 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 04:14:40,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 263.0) internal successors, (4734), 18 states have internal predecessors, (4734), 0 states have call successors, (0), 0 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 04:14:40,740 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 263.0) internal successors, (4734), 18 states have internal predecessors, (4734), 0 states have call successors, (0), 0 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 04:14:40,741 INFO L175 Difference]: Start difference. First operand has 132 places, 105 transitions, 1261 flow. Second operand 17 states and 1826 transitions. [2022-11-23 04:14:40,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 220 transitions, 2678 flow [2022-11-23 04:14:40,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 220 transitions, 2361 flow, removed 115 selfloop flow, removed 25 redundant places. [2022-11-23 04:14:40,846 INFO L231 Difference]: Finished difference. Result has 123 places, 139 transitions, 1846 flow [2022-11-23 04:14:40,848 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1846, PETRI_PLACES=123, PETRI_TRANSITIONS=139} [2022-11-23 04:14:40,849 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 103 predicate places. [2022-11-23 04:14:40,849 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 139 transitions, 1846 flow [2022-11-23 04:14:40,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 102.66666666666667) internal successors, (1848), 18 states have internal predecessors, (1848), 0 states have call successors, (0), 0 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 04:14:40,850 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:14:40,851 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:14:40,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 04:14:41,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 04:14:41,058 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:14:41,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:14:41,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1201002923, now seen corresponding path program 8 times [2022-11-23 04:14:41,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:14:41,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103584110] [2022-11-23 04:14:41,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:14:41,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:14:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:14:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 04:14:41,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:14:41,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103584110] [2022-11-23 04:14:41,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103584110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:14:41,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262772625] [2022-11-23 04:14:41,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:14:41,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:41,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:14:41,383 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:14:41,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 04:14:41,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:14:41,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:14:41,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 04:14:41,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:14:41,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:14:41,827 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 176 treesize of output 126 [2022-11-23 04:14:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 04:14:41,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:14:42,197 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 04:14:42,197 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 201 treesize of output 153 [2022-11-23 04:14:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 04:14:42,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262772625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:14:42,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:14:42,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-23 04:14:42,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695098506] [2022-11-23 04:14:42,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:14:42,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 04:14:42,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:14:42,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 04:14:42,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-11-23 04:14:42,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 263 [2022-11-23 04:14:42,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 139 transitions, 1846 flow. Second operand has 18 states, 18 states have (on average 103.0) internal successors, (1854), 18 states have internal predecessors, (1854), 0 states have call successors, (0), 0 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 04:14:42,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:14:42,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 263 [2022-11-23 04:14:42,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:14:43,598 INFO L130 PetriNetUnfolder]: 1040/1994 cut-off events. [2022-11-23 04:14:43,598 INFO L131 PetriNetUnfolder]: For 13011/13011 co-relation queries the response was YES. [2022-11-23 04:14:43,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9326 conditions, 1994 events. 1040/1994 cut-off events. For 13011/13011 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12295 event pairs, 727 based on Foata normal form. 30/2024 useless extension candidates. Maximal degree in co-relation 9176. Up to 1786 conditions per place. [2022-11-23 04:14:43,616 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 89 selfloop transitions, 4 changer transitions 30/123 dead transitions. [2022-11-23 04:14:43,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 123 transitions, 1668 flow [2022-11-23 04:14:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 04:14:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 04:14:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 855 transitions. [2022-11-23 04:14:43,619 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4063688212927757 [2022-11-23 04:14:43,619 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 855 transitions. [2022-11-23 04:14:43,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 855 transitions. [2022-11-23 04:14:43,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:14:43,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 855 transitions. [2022-11-23 04:14:43,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 106.875) internal successors, (855), 8 states have internal predecessors, (855), 0 states have call successors, (0), 0 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 04:14:43,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 263.0) internal successors, (2367), 9 states have internal predecessors, (2367), 0 states have call successors, (0), 0 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 04:14:43,642 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 263.0) internal successors, (2367), 9 states have internal predecessors, (2367), 0 states have call successors, (0), 0 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 04:14:43,642 INFO L175 Difference]: Start difference. First operand has 123 places, 139 transitions, 1846 flow. Second operand 8 states and 855 transitions. [2022-11-23 04:14:43,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 123 transitions, 1668 flow [2022-11-23 04:14:43,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 123 transitions, 1480 flow, removed 65 selfloop flow, removed 19 redundant places. [2022-11-23 04:14:43,696 INFO L231 Difference]: Finished difference. Result has 100 places, 93 transitions, 1109 flow [2022-11-23 04:14:43,697 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1109, PETRI_PLACES=100, PETRI_TRANSITIONS=93} [2022-11-23 04:14:43,698 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 80 predicate places. [2022-11-23 04:14:43,698 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 93 transitions, 1109 flow [2022-11-23 04:14:43,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 103.0) internal successors, (1854), 18 states have internal predecessors, (1854), 0 states have call successors, (0), 0 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 04:14:43,699 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:14:43,699 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:14:43,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-23 04:14:43,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:43,906 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:14:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:14:43,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1943278338, now seen corresponding path program 9 times [2022-11-23 04:14:43,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:14:43,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816786239] [2022-11-23 04:14:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:14:43,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:14:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:14:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:14:46,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:14:46,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816786239] [2022-11-23 04:14:46,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816786239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:14:46,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951012043] [2022-11-23 04:14:46,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 04:14:46,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:14:46,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:14:46,878 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:14:46,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 04:14:47,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 04:14:47,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:14:47,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-23 04:14:47,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:14:47,849 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 15 treesize of output 11 [2022-11-23 04:14:47,938 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 6 treesize of output 5 [2022-11-23 04:14:48,008 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 6 treesize of output 5 [2022-11-23 04:14:48,837 INFO L321 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2022-11-23 04:14:48,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 24 [2022-11-23 04:14:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:14:48,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:14:53,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:14:53,262 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 180 treesize of output 120 [2022-11-23 04:14:53,390 INFO L321 Elim1Store]: treesize reduction 78, result has 50.3 percent of original size [2022-11-23 04:14:53,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 368 treesize of output 396 [2022-11-23 04:14:53,527 INFO L321 Elim1Store]: treesize reduction 78, result has 50.3 percent of original size [2022-11-23 04:14:53,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 318 treesize of output 320 [2022-11-23 04:14:53,676 INFO L321 Elim1Store]: treesize reduction 78, result has 50.3 percent of original size [2022-11-23 04:14:53,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 213 treesize of output 253 [2022-11-23 04:14:59,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:14:59,488 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 180 treesize of output 120 [2022-11-23 04:14:59,576 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-11-23 04:14:59,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 368 treesize of output 330 [2022-11-23 04:14:59,648 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-11-23 04:14:59,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 318 treesize of output 254 [2022-11-23 04:14:59,717 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-11-23 04:14:59,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 213 treesize of output 187 [2022-11-23 04:15:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:15:00,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951012043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:15:00,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:15:00,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2022-11-23 04:15:00,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659863225] [2022-11-23 04:15:00,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:15:00,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-23 04:15:00,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:15:00,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-23 04:15:00,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1274, Unknown=4, NotChecked=0, Total=1560 [2022-11-23 04:15:02,799 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 263 [2022-11-23 04:15:02,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 93 transitions, 1109 flow. Second operand has 40 states, 40 states have (on average 77.525) internal successors, (3101), 40 states have internal predecessors, (3101), 0 states have call successors, (0), 0 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 04:15:02,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:15:02,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 263 [2022-11-23 04:15:02,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:15:22,374 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 [1] [2022-11-23 04:15:34,891 INFO L130 PetriNetUnfolder]: 1827/3514 cut-off events. [2022-11-23 04:15:34,891 INFO L131 PetriNetUnfolder]: For 12617/12617 co-relation queries the response was YES. [2022-11-23 04:15:34,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13218 conditions, 3514 events. 1827/3514 cut-off events. For 12617/12617 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 24278 event pairs, 230 based on Foata normal form. 94/3608 useless extension candidates. Maximal degree in co-relation 13172. Up to 924 conditions per place. [2022-11-23 04:15:34,913 INFO L137 encePairwiseOnDemand]: 255/263 looper letters, 168 selfloop transitions, 126 changer transitions 116/410 dead transitions. [2022-11-23 04:15:34,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 410 transitions, 3850 flow [2022-11-23 04:15:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-23 04:15:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-23 04:15:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3816 transitions. [2022-11-23 04:15:34,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3154240370309142 [2022-11-23 04:15:34,923 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3816 transitions. [2022-11-23 04:15:34,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3816 transitions. [2022-11-23 04:15:34,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:15:34,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3816 transitions. [2022-11-23 04:15:34,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 82.95652173913044) internal successors, (3816), 46 states have internal predecessors, (3816), 0 states have call successors, (0), 0 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 04:15:34,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 263.0) internal successors, (12361), 47 states have internal predecessors, (12361), 0 states have call successors, (0), 0 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 04:15:34,949 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 263.0) internal successors, (12361), 47 states have internal predecessors, (12361), 0 states have call successors, (0), 0 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 04:15:34,949 INFO L175 Difference]: Start difference. First operand has 100 places, 93 transitions, 1109 flow. Second operand 46 states and 3816 transitions. [2022-11-23 04:15:34,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 410 transitions, 3850 flow [2022-11-23 04:15:34,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 410 transitions, 3808 flow, removed 16 selfloop flow, removed 6 redundant places. [2022-11-23 04:15:34,998 INFO L231 Difference]: Finished difference. Result has 152 places, 179 transitions, 2717 flow [2022-11-23 04:15:34,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2717, PETRI_PLACES=152, PETRI_TRANSITIONS=179} [2022-11-23 04:15:34,999 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 132 predicate places. [2022-11-23 04:15:34,999 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 179 transitions, 2717 flow [2022-11-23 04:15:35,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 77.525) internal successors, (3101), 40 states have internal predecessors, (3101), 0 states have call successors, (0), 0 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 04:15:35,001 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:15:35,001 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:15:35,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 04:15:35,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:15:35,214 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:15:35,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:15:35,215 INFO L85 PathProgramCache]: Analyzing trace with hash 433071272, now seen corresponding path program 10 times [2022-11-23 04:15:35,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:15:35,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673810032] [2022-11-23 04:15:35,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:15:35,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:15:35,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:15:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:15:37,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:15:37,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673810032] [2022-11-23 04:15:37,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673810032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:15:37,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316985084] [2022-11-23 04:15:37,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 04:15:37,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:15:37,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:15:37,292 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:15:37,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 04:15:37,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 04:15:37,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:15:37,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 04:15:37,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:15:37,696 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 15 treesize of output 11 [2022-11-23 04:15:37,768 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 6 treesize of output 5 [2022-11-23 04:15:37,842 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 6 treesize of output 5 [2022-11-23 04:15:38,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:15:38,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 70 treesize of output 18 [2022-11-23 04:15:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:15:38,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:15:40,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:15:40,407 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 183 treesize of output 123 [2022-11-23 04:15:40,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:15:40,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 381 treesize of output 449 [2022-11-23 04:15:40,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:15:40,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 329 treesize of output 369 [2022-11-23 04:15:40,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:15:40,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 249 treesize of output 329 [2022-11-23 04:15:52,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:15:52,423 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 183 treesize of output 123 [2022-11-23 04:15:52,477 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-11-23 04:15:52,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 381 treesize of output 341 [2022-11-23 04:15:52,525 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-11-23 04:15:52,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 329 treesize of output 261 [2022-11-23 04:15:52,586 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-11-23 04:15:52,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 249 treesize of output 221 [2022-11-23 04:15:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:15:53,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316985084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:15:53,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:15:53,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2022-11-23 04:15:53,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279710342] [2022-11-23 04:15:53,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:15:53,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-23 04:15:53,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:15:53,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-23 04:15:53,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1186, Unknown=4, NotChecked=0, Total=1482 [2022-11-23 04:15:56,055 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 263 [2022-11-23 04:15:56,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 179 transitions, 2717 flow. Second operand has 39 states, 39 states have (on average 77.53846153846153) internal successors, (3024), 39 states have internal predecessors, (3024), 0 states have call successors, (0), 0 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 04:15:56,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:15:56,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 263 [2022-11-23 04:15:56,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:16:21,028 INFO L130 PetriNetUnfolder]: 3331/6289 cut-off events. [2022-11-23 04:16:21,028 INFO L131 PetriNetUnfolder]: For 65354/65354 co-relation queries the response was YES. [2022-11-23 04:16:21,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30670 conditions, 6289 events. 3331/6289 cut-off events. For 65354/65354 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 46888 event pairs, 544 based on Foata normal form. 68/6357 useless extension candidates. Maximal degree in co-relation 29962. Up to 1786 conditions per place. [2022-11-23 04:16:21,092 INFO L137 encePairwiseOnDemand]: 255/263 looper letters, 252 selfloop transitions, 219 changer transitions 122/593 dead transitions. [2022-11-23 04:16:21,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 593 transitions, 8182 flow [2022-11-23 04:16:21,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-23 04:16:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-23 04:16:21,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4230 transitions. [2022-11-23 04:16:21,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31536569000223663 [2022-11-23 04:16:21,102 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4230 transitions. [2022-11-23 04:16:21,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4230 transitions. [2022-11-23 04:16:21,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:16:21,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4230 transitions. [2022-11-23 04:16:21,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 82.94117647058823) internal successors, (4230), 51 states have internal predecessors, (4230), 0 states have call successors, (0), 0 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 04:16:21,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 263.0) internal successors, (13676), 52 states have internal predecessors, (13676), 0 states have call successors, (0), 0 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 04:16:21,132 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 263.0) internal successors, (13676), 52 states have internal predecessors, (13676), 0 states have call successors, (0), 0 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 04:16:21,132 INFO L175 Difference]: Start difference. First operand has 152 places, 179 transitions, 2717 flow. Second operand 51 states and 4230 transitions. [2022-11-23 04:16:21,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 593 transitions, 8182 flow [2022-11-23 04:16:21,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 593 transitions, 7332 flow, removed 391 selfloop flow, removed 14 redundant places. [2022-11-23 04:16:21,427 INFO L231 Difference]: Finished difference. Result has 215 places, 321 transitions, 5528 flow [2022-11-23 04:16:21,427 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=2310, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=5528, PETRI_PLACES=215, PETRI_TRANSITIONS=321} [2022-11-23 04:16:21,428 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 195 predicate places. [2022-11-23 04:16:21,428 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 321 transitions, 5528 flow [2022-11-23 04:16:21,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 77.53846153846153) internal successors, (3024), 39 states have internal predecessors, (3024), 0 states have call successors, (0), 0 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 04:16:21,429 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:16:21,429 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:16:21,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 04:16:21,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:16:21,636 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:16:21,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:16:21,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1926292904, now seen corresponding path program 11 times [2022-11-23 04:16:21,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:16:21,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918248169] [2022-11-23 04:16:21,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:16:21,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:16:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:16:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:16:24,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:16:24,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918248169] [2022-11-23 04:16:24,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918248169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:16:24,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990638276] [2022-11-23 04:16:24,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 04:16:24,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:16:24,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:16:24,757 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:16:24,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 04:16:24,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 04:16:24,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:16:24,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-23 04:16:24,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:16:25,122 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 13 treesize of output 9 [2022-11-23 04:16:25,188 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 6 treesize of output 5 [2022-11-23 04:16:25,258 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 6 treesize of output 5 [2022-11-23 04:16:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 04:16:26,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 04:16:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 04:16:26,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 04:16:26,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 04:16:26,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 04:16:26,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 04:16:26,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 04:16:26,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 04:16:26,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:16:26,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 27 [2022-11-23 04:16:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:16:26,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:16:29,722 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_~back~0_192 Int) (v_ArrVal_441 (Array Int Int))) (let ((.cse1 (* v_~back~0_192 4)) (.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_441) c_~queue~0.base))) (or (not (< (+ v_~back~0_192 1) c_~n~0)) (not (= (+ (select .cse0 (+ c_~queue~0.offset .cse1)) 1) 0)) (not (= (select .cse0 (+ c_~queue~0.offset (- 4) .cse1)) 1)) (not (= (select .cse0 (+ c_~queue~0.offset .cse1 4)) 1)) (forall ((~front~0 Int)) (or (forall ((v_~front~0_127 Int)) (or (not (<= (+ ~front~0 1) v_~front~0_127)) (forall ((v_~front~0_126 Int)) (or (<= (+ v_~back~0_192 2) v_~front~0_126) (not (<= (+ v_~front~0_127 1) v_~front~0_126)) (not (< (+ c_~sum~0 (select .cse0 (+ c_~queue~0.offset (* v_~front~0_126 4))) (select .cse0 (+ c_~queue~0.offset (* ~front~0 4))) (select .cse0 (+ c_~queue~0.offset (* v_~front~0_127 4)))) 0)))))) (<= v_~back~0_192 ~front~0) (< ~front~0 0)))))) (forall ((v_~back~0_192 Int) (v_ArrVal_441 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_441) c_~queue~0.base)) (.cse3 (* v_~back~0_192 4))) (or (forall ((~front~0 Int)) (or (<= v_~back~0_192 ~front~0) (forall ((v_~front~0_127 Int)) (or (not (<= (+ ~front~0 1) v_~front~0_127)) (forall ((v_~front~0_126 Int)) (or (<= (+ v_~back~0_192 2) v_~front~0_126) (not (<= (+ v_~front~0_127 1) v_~front~0_126)) (not (< 1 (+ c_~sum~0 (select .cse2 (+ c_~queue~0.offset (* v_~front~0_126 4))) (select .cse2 (+ c_~queue~0.offset (* ~front~0 4))) (select .cse2 (+ c_~queue~0.offset (* v_~front~0_127 4)))))))))) (< ~front~0 0))) (not (< (+ v_~back~0_192 1) c_~n~0)) (not (= (+ (select .cse2 (+ c_~queue~0.offset .cse3)) 1) 0)) (not (= (select .cse2 (+ c_~queue~0.offset (- 4) .cse3)) 1)) (not (= (select .cse2 (+ c_~queue~0.offset .cse3 4)) 1)))))) is different from false [2022-11-23 04:16:30,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:16:30,451 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 181 treesize of output 121 [2022-11-23 04:16:30,609 INFO L321 Elim1Store]: treesize reduction 76, result has 51.6 percent of original size [2022-11-23 04:16:30,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 373 treesize of output 403 [2022-11-23 04:16:30,766 INFO L321 Elim1Store]: treesize reduction 76, result has 51.6 percent of original size [2022-11-23 04:16:30,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 323 treesize of output 327 [2022-11-23 04:16:30,917 INFO L321 Elim1Store]: treesize reduction 76, result has 51.6 percent of original size [2022-11-23 04:16:30,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 247 treesize of output 289 [2022-11-23 04:16:35,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:16:35,719 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 181 treesize of output 121 [2022-11-23 04:16:35,793 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-11-23 04:16:35,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 373 treesize of output 335 [2022-11-23 04:16:35,861 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-11-23 04:16:35,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 323 treesize of output 259 [2022-11-23 04:16:35,930 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-11-23 04:16:35,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 247 treesize of output 221 [2022-11-23 04:16:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:16:36,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990638276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:16:36,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:16:36,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2022-11-23 04:16:36,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556215324] [2022-11-23 04:16:36,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:16:36,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-23 04:16:36,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:16:36,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-23 04:16:36,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1302, Unknown=1, NotChecked=74, Total=1560 [2022-11-23 04:16:37,150 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 263 [2022-11-23 04:16:37,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 321 transitions, 5528 flow. Second operand has 40 states, 40 states have (on average 77.525) internal successors, (3101), 40 states have internal predecessors, (3101), 0 states have call successors, (0), 0 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 04:16:37,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:16:37,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 263 [2022-11-23 04:16:37,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:17:01,415 WARN L233 SmtUtils]: Spent 13.70s on a formula simplification. DAG size of input: 176 DAG size of output: 174 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 04:17:15,317 INFO L130 PetriNetUnfolder]: 3401/6465 cut-off events. [2022-11-23 04:17:15,317 INFO L131 PetriNetUnfolder]: For 99753/99753 co-relation queries the response was YES. [2022-11-23 04:17:15,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33777 conditions, 6465 events. 3401/6465 cut-off events. For 99753/99753 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 45836 event pairs, 1398 based on Foata normal form. 25/6490 useless extension candidates. Maximal degree in co-relation 31864. Up to 5062 conditions per place. [2022-11-23 04:17:15,388 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 325 selfloop transitions, 58 changer transitions 119/502 dead transitions. [2022-11-23 04:17:15,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 502 transitions, 7491 flow [2022-11-23 04:17:15,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 04:17:15,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-23 04:17:15,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2730 transitions. [2022-11-23 04:17:15,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31455236778430695 [2022-11-23 04:17:15,395 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2730 transitions. [2022-11-23 04:17:15,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2730 transitions. [2022-11-23 04:17:15,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:17:15,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2730 transitions. [2022-11-23 04:17:15,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 82.72727272727273) internal successors, (2730), 33 states have internal predecessors, (2730), 0 states have call successors, (0), 0 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 04:17:15,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 263.0) internal successors, (8942), 34 states have internal predecessors, (8942), 0 states have call successors, (0), 0 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 04:17:15,411 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 263.0) internal successors, (8942), 34 states have internal predecessors, (8942), 0 states have call successors, (0), 0 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 04:17:15,412 INFO L175 Difference]: Start difference. First operand has 215 places, 321 transitions, 5528 flow. Second operand 33 states and 2730 transitions. [2022-11-23 04:17:15,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 502 transitions, 7491 flow [2022-11-23 04:17:16,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 502 transitions, 6579 flow, removed 414 selfloop flow, removed 17 redundant places. [2022-11-23 04:17:16,385 INFO L231 Difference]: Finished difference. Result has 244 places, 330 transitions, 5025 flow [2022-11-23 04:17:16,385 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=4534, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5025, PETRI_PLACES=244, PETRI_TRANSITIONS=330} [2022-11-23 04:17:16,386 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 224 predicate places. [2022-11-23 04:17:16,386 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 330 transitions, 5025 flow [2022-11-23 04:17:16,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 77.525) internal successors, (3101), 40 states have internal predecessors, (3101), 0 states have call successors, (0), 0 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 04:17:16,387 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:17:16,387 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:17:16,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 04:17:16,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 04:17:16,588 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:17:16,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:17:16,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1374522864, now seen corresponding path program 12 times [2022-11-23 04:17:16,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:17:16,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351691783] [2022-11-23 04:17:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:17:16,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:17:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:17:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:17:18,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:17:18,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351691783] [2022-11-23 04:17:18,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351691783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:17:18,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916683149] [2022-11-23 04:17:18,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 04:17:18,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:17:18,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:17:18,695 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:17:18,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 04:17:19,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 04:17:19,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:17:19,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-23 04:17:19,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:17:20,075 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:17:20,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 18 [2022-11-23 04:17:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:17:20,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:17:21,107 INFO L321 Elim1Store]: treesize reduction 64, result has 56.5 percent of original size [2022-11-23 04:17:21,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 292 treesize of output 256 [2022-11-23 04:17:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:17:22,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916683149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:17:22,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:17:22,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2022-11-23 04:17:22,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279028663] [2022-11-23 04:17:22,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:17:22,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-23 04:17:22,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:17:22,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-23 04:17:22,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 04:17:25,254 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 263 [2022-11-23 04:17:25,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 330 transitions, 5025 flow. Second operand has 37 states, 37 states have (on average 96.64864864864865) internal successors, (3576), 37 states have internal predecessors, (3576), 0 states have call successors, (0), 0 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 04:17:25,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:17:25,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 263 [2022-11-23 04:17:25,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:17:31,325 INFO L130 PetriNetUnfolder]: 3563/6770 cut-off events. [2022-11-23 04:17:31,326 INFO L131 PetriNetUnfolder]: For 105671/105671 co-relation queries the response was YES. [2022-11-23 04:17:31,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34271 conditions, 6770 events. 3563/6770 cut-off events. For 105671/105671 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 49005 event pairs, 1346 based on Foata normal form. 5/6775 useless extension candidates. Maximal degree in co-relation 34132. Up to 5461 conditions per place. [2022-11-23 04:17:31,403 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 322 selfloop transitions, 74 changer transitions 76/472 dead transitions. [2022-11-23 04:17:31,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 472 transitions, 6950 flow [2022-11-23 04:17:31,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 04:17:31,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-23 04:17:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2743 transitions. [2022-11-23 04:17:31,409 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3862836220250669 [2022-11-23 04:17:31,409 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2743 transitions. [2022-11-23 04:17:31,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2743 transitions. [2022-11-23 04:17:31,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:17:31,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2743 transitions. [2022-11-23 04:17:31,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 101.5925925925926) internal successors, (2743), 27 states have internal predecessors, (2743), 0 states have call successors, (0), 0 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 04:17:31,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 263.0) internal successors, (7364), 28 states have internal predecessors, (7364), 0 states have call successors, (0), 0 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 04:17:31,424 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 263.0) internal successors, (7364), 28 states have internal predecessors, (7364), 0 states have call successors, (0), 0 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 04:17:31,424 INFO L175 Difference]: Start difference. First operand has 244 places, 330 transitions, 5025 flow. Second operand 27 states and 2743 transitions. [2022-11-23 04:17:31,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 472 transitions, 6950 flow [2022-11-23 04:17:32,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 472 transitions, 6790 flow, removed 50 selfloop flow, removed 16 redundant places. [2022-11-23 04:17:32,391 INFO L231 Difference]: Finished difference. Result has 258 places, 352 transitions, 5649 flow [2022-11-23 04:17:32,391 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=4873, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5649, PETRI_PLACES=258, PETRI_TRANSITIONS=352} [2022-11-23 04:17:32,392 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 238 predicate places. [2022-11-23 04:17:32,392 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 352 transitions, 5649 flow [2022-11-23 04:17:32,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 96.64864864864865) internal successors, (3576), 37 states have internal predecessors, (3576), 0 states have call successors, (0), 0 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 04:17:32,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:17:32,393 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:17:32,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 04:17:32,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 04:17:32,594 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:17:32,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:17:32,594 INFO L85 PathProgramCache]: Analyzing trace with hash 958818431, now seen corresponding path program 13 times [2022-11-23 04:17:32,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:17:32,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778971532] [2022-11-23 04:17:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:17:32,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:17:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:17:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:17:36,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:17:36,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778971532] [2022-11-23 04:17:36,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778971532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:17:36,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22516878] [2022-11-23 04:17:36,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 04:17:36,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:17:36,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:17:36,954 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:17:36,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 04:17:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:17:37,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 04:17:37,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:17:37,736 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:17:37,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 70 treesize of output 18 [2022-11-23 04:17:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 04:17:37,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:17:38,680 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-11-23 04:17:38,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 272 treesize of output 274 [2022-11-23 04:17:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 04:17:40,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22516878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:17:40,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:17:40,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 31 [2022-11-23 04:17:40,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192231934] [2022-11-23 04:17:40,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:17:40,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 04:17:40,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:17:40,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 04:17:40,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 04:17:44,755 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 263 [2022-11-23 04:17:44,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 352 transitions, 5649 flow. Second operand has 33 states, 33 states have (on average 96.81818181818181) internal successors, (3195), 33 states have internal predecessors, (3195), 0 states have call successors, (0), 0 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 04:17:44,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:17:44,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 263 [2022-11-23 04:17:44,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:17:53,519 INFO L130 PetriNetUnfolder]: 5575/10425 cut-off events. [2022-11-23 04:17:53,519 INFO L131 PetriNetUnfolder]: For 219010/219010 co-relation queries the response was YES. [2022-11-23 04:17:53,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55200 conditions, 10425 events. 5575/10425 cut-off events. For 219010/219010 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 79826 event pairs, 1332 based on Foata normal form. 59/10484 useless extension candidates. Maximal degree in co-relation 54553. Up to 3937 conditions per place. [2022-11-23 04:17:53,668 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 328 selfloop transitions, 281 changer transitions 118/727 dead transitions. [2022-11-23 04:17:53,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 727 transitions, 11384 flow [2022-11-23 04:17:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 04:17:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-23 04:17:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3579 transitions. [2022-11-23 04:17:53,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3888104291146116 [2022-11-23 04:17:53,676 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3579 transitions. [2022-11-23 04:17:53,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3579 transitions. [2022-11-23 04:17:53,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:17:53,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3579 transitions. [2022-11-23 04:17:53,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 102.25714285714285) internal successors, (3579), 35 states have internal predecessors, (3579), 0 states have call successors, (0), 0 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 04:17:53,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 263.0) internal successors, (9468), 36 states have internal predecessors, (9468), 0 states have call successors, (0), 0 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 04:17:53,696 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 263.0) internal successors, (9468), 36 states have internal predecessors, (9468), 0 states have call successors, (0), 0 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 04:17:53,696 INFO L175 Difference]: Start difference. First operand has 258 places, 352 transitions, 5649 flow. Second operand 35 states and 3579 transitions. [2022-11-23 04:17:53,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 727 transitions, 11384 flow [2022-11-23 04:17:55,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 727 transitions, 11005 flow, removed 165 selfloop flow, removed 17 redundant places. [2022-11-23 04:17:55,218 INFO L231 Difference]: Finished difference. Result has 293 places, 499 transitions, 9072 flow [2022-11-23 04:17:55,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=5328, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9072, PETRI_PLACES=293, PETRI_TRANSITIONS=499} [2022-11-23 04:17:55,219 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 273 predicate places. [2022-11-23 04:17:55,219 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 499 transitions, 9072 flow [2022-11-23 04:17:55,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 96.81818181818181) internal successors, (3195), 33 states have internal predecessors, (3195), 0 states have call successors, (0), 0 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 04:17:55,219 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:17:55,220 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:17:55,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-23 04:17:55,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 04:17:55,420 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:17:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:17:55,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1451017431, now seen corresponding path program 14 times [2022-11-23 04:17:55,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:17:55,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660606065] [2022-11-23 04:17:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:17:55,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:17:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:17:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:17:58,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:17:58,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660606065] [2022-11-23 04:17:58,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660606065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:17:58,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861216028] [2022-11-23 04:17:58,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 04:17:58,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:17:58,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:17:58,253 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:17:58,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 04:17:58,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 04:17:58,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:17:58,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 04:17:58,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:17:58,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:17:58,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 70 treesize of output 18 [2022-11-23 04:17:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 04:17:58,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:17:59,869 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-11-23 04:17:59,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 274 treesize of output 276 [2022-11-23 04:18:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 04:18:01,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861216028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:18:01,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:18:01,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 28 [2022-11-23 04:18:01,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750078852] [2022-11-23 04:18:01,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:18:01,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 04:18:01,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:18:01,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 04:18:01,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-11-23 04:18:04,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 263 [2022-11-23 04:18:04,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 499 transitions, 9072 flow. Second operand has 30 states, 30 states have (on average 97.93333333333334) internal successors, (2938), 30 states have internal predecessors, (2938), 0 states have call successors, (0), 0 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 04:18:04,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:18:04,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 263 [2022-11-23 04:18:04,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:18:13,768 INFO L130 PetriNetUnfolder]: 7693/14322 cut-off events. [2022-11-23 04:18:13,768 INFO L131 PetriNetUnfolder]: For 434945/434945 co-relation queries the response was YES. [2022-11-23 04:18:13,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86492 conditions, 14322 events. 7693/14322 cut-off events. For 434945/434945 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 116637 event pairs, 1648 based on Foata normal form. 56/14378 useless extension candidates. Maximal degree in co-relation 84327. Up to 6239 conditions per place. [2022-11-23 04:18:14,014 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 420 selfloop transitions, 348 changer transitions 145/913 dead transitions. [2022-11-23 04:18:14,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 913 transitions, 16533 flow [2022-11-23 04:18:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-23 04:18:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-23 04:18:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4243 transitions. [2022-11-23 04:18:14,022 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3934897523880182 [2022-11-23 04:18:14,022 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4243 transitions. [2022-11-23 04:18:14,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4243 transitions. [2022-11-23 04:18:14,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:18:14,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4243 transitions. [2022-11-23 04:18:14,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 103.48780487804878) internal successors, (4243), 41 states have internal predecessors, (4243), 0 states have call successors, (0), 0 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 04:18:14,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 263.0) internal successors, (11046), 42 states have internal predecessors, (11046), 0 states have call successors, (0), 0 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 04:18:14,043 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 263.0) internal successors, (11046), 42 states have internal predecessors, (11046), 0 states have call successors, (0), 0 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 04:18:14,043 INFO L175 Difference]: Start difference. First operand has 293 places, 499 transitions, 9072 flow. Second operand 41 states and 4243 transitions. [2022-11-23 04:18:14,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 913 transitions, 16533 flow [2022-11-23 04:18:17,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 913 transitions, 14730 flow, removed 808 selfloop flow, removed 17 redundant places. [2022-11-23 04:18:17,236 INFO L231 Difference]: Finished difference. Result has 338 places, 658 transitions, 12541 flow [2022-11-23 04:18:17,236 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=8010, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=12541, PETRI_PLACES=338, PETRI_TRANSITIONS=658} [2022-11-23 04:18:17,237 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 318 predicate places. [2022-11-23 04:18:17,237 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 658 transitions, 12541 flow [2022-11-23 04:18:17,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 97.93333333333334) internal successors, (2938), 30 states have internal predecessors, (2938), 0 states have call successors, (0), 0 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 04:18:17,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:18:17,238 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:18:17,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-23 04:18:17,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 04:18:17,445 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:18:17,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:18:17,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2070517657, now seen corresponding path program 15 times [2022-11-23 04:18:17,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:18:17,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654980947] [2022-11-23 04:18:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:18:17,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:18:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:18:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 04:18:17,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:18:17,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654980947] [2022-11-23 04:18:17,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654980947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:18:17,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861751667] [2022-11-23 04:18:17,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 04:18:17,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:18:17,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:18:17,771 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:18:17,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 04:18:17,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 04:18:17,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:18:17,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 04:18:17,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:18:18,287 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:18:18,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 196 treesize of output 128 [2022-11-23 04:18:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 04:18:18,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:18:18,947 INFO L321 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2022-11-23 04:18:18,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 225 treesize of output 159 [2022-11-23 04:18:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 04:18:19,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861751667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:18:19,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:18:19,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 16 [2022-11-23 04:18:19,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835268055] [2022-11-23 04:18:19,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:18:19,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 04:18:19,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:18:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 04:18:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-23 04:18:19,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 263 [2022-11-23 04:18:19,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 658 transitions, 12541 flow. Second operand has 17 states, 17 states have (on average 107.94117647058823) internal successors, (1835), 17 states have internal predecessors, (1835), 0 states have call successors, (0), 0 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 04:18:19,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:18:19,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 263 [2022-11-23 04:18:19,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:18:29,586 INFO L130 PetriNetUnfolder]: 11861/21993 cut-off events. [2022-11-23 04:18:29,587 INFO L131 PetriNetUnfolder]: For 810704/810704 co-relation queries the response was YES. [2022-11-23 04:18:30,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144550 conditions, 21993 events. 11861/21993 cut-off events. For 810704/810704 co-relation queries the response was YES. Maximal size of possible extension queue 937. Compared 188723 event pairs, 2014 based on Foata normal form. 100/22093 useless extension candidates. Maximal degree in co-relation 142358. Up to 7645 conditions per place. [2022-11-23 04:18:30,085 INFO L137 encePairwiseOnDemand]: 260/263 looper letters, 400 selfloop transitions, 665 changer transitions 5/1070 dead transitions. [2022-11-23 04:18:30,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1070 transitions, 23108 flow [2022-11-23 04:18:30,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 04:18:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 04:18:30,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1252 transitions. [2022-11-23 04:18:30,088 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4327687521603871 [2022-11-23 04:18:30,089 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1252 transitions. [2022-11-23 04:18:30,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1252 transitions. [2022-11-23 04:18:30,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:18:30,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1252 transitions. [2022-11-23 04:18:30,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 113.81818181818181) internal successors, (1252), 11 states have internal predecessors, (1252), 0 states have call successors, (0), 0 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 04:18:30,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 263.0) internal successors, (3156), 12 states have internal predecessors, (3156), 0 states have call successors, (0), 0 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 04:18:30,095 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 263.0) internal successors, (3156), 12 states have internal predecessors, (3156), 0 states have call successors, (0), 0 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 04:18:30,096 INFO L175 Difference]: Start difference. First operand has 338 places, 658 transitions, 12541 flow. Second operand 11 states and 1252 transitions. [2022-11-23 04:18:30,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1070 transitions, 23108 flow [2022-11-23 04:18:35,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1070 transitions, 21130 flow, removed 895 selfloop flow, removed 30 redundant places. [2022-11-23 04:18:35,575 INFO L231 Difference]: Finished difference. Result has 318 places, 999 transitions, 20049 flow [2022-11-23 04:18:35,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=11239, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20049, PETRI_PLACES=318, PETRI_TRANSITIONS=999} [2022-11-23 04:18:35,576 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 298 predicate places. [2022-11-23 04:18:35,576 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 999 transitions, 20049 flow [2022-11-23 04:18:35,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 107.94117647058823) internal successors, (1835), 17 states have internal predecessors, (1835), 0 states have call successors, (0), 0 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 04:18:35,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:18:35,577 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:18:35,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 04:18:35,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:18:35,777 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:18:35,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:18:35,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1555731410, now seen corresponding path program 16 times [2022-11-23 04:18:35,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:18:35,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325859440] [2022-11-23 04:18:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:18:35,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:18:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:18:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:18:38,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:18:38,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325859440] [2022-11-23 04:18:38,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325859440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:18:38,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508053301] [2022-11-23 04:18:38,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 04:18:38,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:18:38,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:18:38,156 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:18:38,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 04:18:38,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 04:18:38,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:18:38,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 04:18:38,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:18:39,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:18:39,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 70 treesize of output 18 [2022-11-23 04:18:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:18:39,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:18:40,439 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-11-23 04:18:40,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 298 treesize of output 300 [2022-11-23 04:18:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:18:43,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508053301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:18:43,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:18:43,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 41 [2022-11-23 04:18:43,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517955203] [2022-11-23 04:18:43,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:18:43,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-23 04:18:43,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:18:43,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-23 04:18:43,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1514, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 04:18:46,123 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 263 [2022-11-23 04:18:46,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 999 transitions, 20049 flow. Second operand has 43 states, 43 states have (on average 96.55813953488372) internal successors, (4152), 43 states have internal predecessors, (4152), 0 states have call successors, (0), 0 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 04:18:46,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:18:46,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 263 [2022-11-23 04:18:46,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:19:11,197 INFO L130 PetriNetUnfolder]: 15009/27736 cut-off events. [2022-11-23 04:19:11,198 INFO L131 PetriNetUnfolder]: For 1038322/1038322 co-relation queries the response was YES. [2022-11-23 04:19:11,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200029 conditions, 27736 events. 15009/27736 cut-off events. For 1038322/1038322 co-relation queries the response was YES. Maximal size of possible extension queue 1426. Compared 250949 event pairs, 5022 based on Foata normal form. 15/27751 useless extension candidates. Maximal degree in co-relation 197957. Up to 19388 conditions per place. [2022-11-23 04:19:11,754 INFO L137 encePairwiseOnDemand]: 255/263 looper letters, 1111 selfloop transitions, 406 changer transitions 219/1736 dead transitions. [2022-11-23 04:19:11,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1736 transitions, 37414 flow [2022-11-23 04:19:11,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-23 04:19:11,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-11-23 04:19:11,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 7595 transitions. [2022-11-23 04:19:11,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39024766211078 [2022-11-23 04:19:11,766 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 7595 transitions. [2022-11-23 04:19:11,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 7595 transitions. [2022-11-23 04:19:11,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:19:11,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 7595 transitions. [2022-11-23 04:19:11,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 102.63513513513513) internal successors, (7595), 74 states have internal predecessors, (7595), 0 states have call successors, (0), 0 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 04:19:11,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 263.0) internal successors, (19725), 75 states have internal predecessors, (19725), 0 states have call successors, (0), 0 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 04:19:11,800 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 263.0) internal successors, (19725), 75 states have internal predecessors, (19725), 0 states have call successors, (0), 0 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 04:19:11,800 INFO L175 Difference]: Start difference. First operand has 318 places, 999 transitions, 20049 flow. Second operand 74 states and 7595 transitions. [2022-11-23 04:19:11,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1736 transitions, 37414 flow [2022-11-23 04:19:20,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 1736 transitions, 35298 flow, removed 1056 selfloop flow, removed 2 redundant places. [2022-11-23 04:19:20,785 INFO L231 Difference]: Finished difference. Result has 420 places, 1296 transitions, 29661 flow [2022-11-23 04:19:20,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=18947, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=999, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=29661, PETRI_PLACES=420, PETRI_TRANSITIONS=1296} [2022-11-23 04:19:20,786 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 400 predicate places. [2022-11-23 04:19:20,786 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 1296 transitions, 29661 flow [2022-11-23 04:19:20,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 96.55813953488372) internal successors, (4152), 43 states have internal predecessors, (4152), 0 states have call successors, (0), 0 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 04:19:20,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:19:20,787 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:19:20,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 04:19:20,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:19:20,988 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:19:20,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:19:20,988 INFO L85 PathProgramCache]: Analyzing trace with hash -88701608, now seen corresponding path program 17 times [2022-11-23 04:19:20,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:19:20,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810482698] [2022-11-23 04:19:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:19:20,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:19:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:19:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 04:19:23,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:19:23,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810482698] [2022-11-23 04:19:23,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810482698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:19:23,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733073344] [2022-11-23 04:19:23,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 04:19:23,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:19:23,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:19:23,138 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:19:23,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 04:19:23,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 04:19:23,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:19:23,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 04:19:23,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:19:23,793 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 04:19:23,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 70 treesize of output 18 [2022-11-23 04:19:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 04:19:23,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:19:24,537 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-11-23 04:19:24,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 274 treesize of output 276 [2022-11-23 04:19:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 04:19:26,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733073344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:19:26,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:19:26,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 32 [2022-11-23 04:19:26,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387836058] [2022-11-23 04:19:26,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:19:26,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 04:19:26,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:19:26,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 04:19:26,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 04:19:30,601 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 263 [2022-11-23 04:19:30,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 1296 transitions, 29661 flow. Second operand has 34 states, 34 states have (on average 97.8529411764706) internal successors, (3327), 34 states have internal predecessors, (3327), 0 states have call successors, (0), 0 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 04:19:30,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:19:30,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 263 [2022-11-23 04:19:30,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 04:19:52,516 INFO L130 PetriNetUnfolder]: 16041/29613 cut-off events. [2022-11-23 04:19:52,517 INFO L131 PetriNetUnfolder]: For 1266784/1266784 co-relation queries the response was YES. [2022-11-23 04:19:53,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218190 conditions, 29613 events. 16041/29613 cut-off events. For 1266784/1266784 co-relation queries the response was YES. Maximal size of possible extension queue 1578. Compared 270459 event pairs, 5942 based on Foata normal form. 20/29633 useless extension candidates. Maximal degree in co-relation 216049. Up to 18539 conditions per place. [2022-11-23 04:19:53,333 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 1056 selfloop transitions, 421 changer transitions 107/1584 dead transitions. [2022-11-23 04:19:53,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 1584 transitions, 38665 flow [2022-11-23 04:19:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-23 04:19:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-23 04:19:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3289 transitions. [2022-11-23 04:19:53,337 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3908032319391635 [2022-11-23 04:19:53,337 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3289 transitions. [2022-11-23 04:19:53,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3289 transitions. [2022-11-23 04:19:53,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 04:19:53,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3289 transitions. [2022-11-23 04:19:53,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 102.78125) internal successors, (3289), 32 states have internal predecessors, (3289), 0 states have call successors, (0), 0 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 04:19:53,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 263.0) internal successors, (8679), 33 states have internal predecessors, (8679), 0 states have call successors, (0), 0 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 04:19:53,361 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 263.0) internal successors, (8679), 33 states have internal predecessors, (8679), 0 states have call successors, (0), 0 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 04:19:53,362 INFO L175 Difference]: Start difference. First operand has 420 places, 1296 transitions, 29661 flow. Second operand 32 states and 3289 transitions. [2022-11-23 04:19:53,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 1584 transitions, 38665 flow [2022-11-23 04:20:06,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1584 transitions, 34403 flow, removed 2030 selfloop flow, removed 14 redundant places. [2022-11-23 04:20:06,887 INFO L231 Difference]: Finished difference. Result has 441 places, 1361 transitions, 28797 flow [2022-11-23 04:20:06,888 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=26138, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=898, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=28797, PETRI_PLACES=441, PETRI_TRANSITIONS=1361} [2022-11-23 04:20:06,888 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 421 predicate places. [2022-11-23 04:20:06,889 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 1361 transitions, 28797 flow [2022-11-23 04:20:06,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 97.8529411764706) internal successors, (3327), 34 states have internal predecessors, (3327), 0 states have call successors, (0), 0 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 04:20:06,889 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 04:20:06,890 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 04:20:06,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 04:20:07,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:20:07,090 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 04:20:07,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 04:20:07,091 INFO L85 PathProgramCache]: Analyzing trace with hash -116257216, now seen corresponding path program 18 times [2022-11-23 04:20:07,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 04:20:07,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795061088] [2022-11-23 04:20:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 04:20:07,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 04:20:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 04:20:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 04:20:07,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 04:20:07,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795061088] [2022-11-23 04:20:07,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795061088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 04:20:07,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500541813] [2022-11-23 04:20:07,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 04:20:07,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 04:20:07,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 04:20:07,462 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 04:20:07,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_506327a8-e683-4b85-bd83-d0ce965edf18/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 04:20:07,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-23 04:20:07,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 04:20:07,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 04:20:07,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 04:20:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 04:20:08,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 04:20:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 04:20:08,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500541813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 04:20:08,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 04:20:08,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-11-23 04:20:08,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731314191] [2022-11-23 04:20:08,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 04:20:08,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 04:20:08,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 04:20:08,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 04:20:08,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2022-11-23 04:20:08,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 263 [2022-11-23 04:20:08,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 1361 transitions, 28797 flow. Second operand has 25 states, 25 states have (on average 107.8) internal successors, (2695), 25 states have internal predecessors, (2695), 0 states have call successors, (0), 0 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 04:20:08,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 04:20:08,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 263 [2022-11-23 04:20:08,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand