./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R --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 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 --- 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-38b53e6 [2022-11-25 18:26:12,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:26:12,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:26:12,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:26:12,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:26:12,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:26:12,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:26:12,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:26:12,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:26:12,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:26:12,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:26:12,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:26:12,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:26:12,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:26:12,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:26:12,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:26:12,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:26:12,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:26:12,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:26:12,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:26:12,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:26:12,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:26:12,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:26:12,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:26:12,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:26:12,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:26:12,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:26:12,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:26:12,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:26:12,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:26:12,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:26:12,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:26:12,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:26:12,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:26:12,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:26:12,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:26:12,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:26:12,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:26:12,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:26:12,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:26:12,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:26:12,337 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:26:12,395 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:26:12,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:26:12,396 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:26:12,396 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:26:12,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:26:12,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:26:12,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:26:12,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:26:12,398 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:26:12,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:26:12,398 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:26:12,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:26:12,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:26:12,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:26:12,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:26:12,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:26:12,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:26:12,399 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:26:12,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:26:12,400 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:26:12,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:26:12,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:26:12,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:26:12,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:26:12,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:26:12,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:26:12,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:26:12,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:26:12,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:26:12,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:26:12,411 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:26:12,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:26:12,411 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:26:12,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:26:12,412 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_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1890d03ecee4b13e5a6c0f8c72292cb7ef9118f93d1435df375cec86140a0197 [2022-11-25 18:26:12,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:26:12,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:26:12,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:26:12,729 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:26:12,730 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:26:12,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2022-11-25 18:26:15,831 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:26:16,014 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:26:16,015 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2022-11-25 18:26:16,022 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/data/a5a51ab9f/86658ae016ec4b179e0c0cac8bc769e3/FLAG8eaa1eb5e [2022-11-25 18:26:16,039 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/data/a5a51ab9f/86658ae016ec4b179e0c0cac8bc769e3 [2022-11-25 18:26:16,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:26:16,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:26:16,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:26:16,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:26:16,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:26:16,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:26:16" (1/1) ... [2022-11-25 18:26:16,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c6e4b41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:16, skipping insertion in model container [2022-11-25 18:26:16,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:26:16" (1/1) ... [2022-11-25 18:26:16,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:26:16,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:26:16,272 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:26:16,273 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:26:16,279 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:26:16,280 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:26:16,284 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:26:16,285 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:26:16,294 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_24725451-3007-4a7b-9f3e-7a1b967e97b7/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c[2865,2878] [2022-11-25 18:26:16,306 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:26:16,317 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:26:16,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:26:16,335 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:26:16,337 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:26:16,338 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:26:16,341 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:26:16,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:26:16,347 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_24725451-3007-4a7b-9f3e-7a1b967e97b7/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c[2865,2878] [2022-11-25 18:26:16,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:26:16,368 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:26:16,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:16 WrapperNode [2022-11-25 18:26:16,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:26:16,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:26:16,370 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:26:16,371 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:26:16,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:16" (1/1) ... [2022-11-25 18:26:16,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:16" (1/1) ... [2022-11-25 18:26:16,427 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 275 [2022-11-25 18:26:16,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:26:16,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:26:16,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:26:16,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:26:16,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:16" (1/1) ... [2022-11-25 18:26:16,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:16" (1/1) ... [2022-11-25 18:26:16,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:16" (1/1) ... [2022-11-25 18:26:16,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:16" (1/1) ... [2022-11-25 18:26:16,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:16" (1/1) ... [2022-11-25 18:26:16,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:16" (1/1) ... [2022-11-25 18:26:16,461 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:16" (1/1) ... [2022-11-25 18:26:16,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:16" (1/1) ... [2022-11-25 18:26:16,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:26:16,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:26:16,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:26:16,468 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:26:16,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:16" (1/1) ... [2022-11-25 18:26:16,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:26:16,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:26:16,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:26:16,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:26:16,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:26:16,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:26:16,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:26:16,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:26:16,568 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:26:16,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:26:16,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:26:16,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:26:16,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 18:26:16,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 18:26:16,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:26:16,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:26:16,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:26:16,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:26:16,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:26:16,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:26:16,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:26:16,573 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:26:16,723 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:26:16,740 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:26:17,319 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:26:17,572 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:26:17,573 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-25 18:26:17,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:26:17 BoogieIcfgContainer [2022-11-25 18:26:17,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:26:17,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:26:17,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:26:17,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:26:17,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:26:16" (1/3) ... [2022-11-25 18:26:17,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386e4f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:26:17, skipping insertion in model container [2022-11-25 18:26:17,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:16" (2/3) ... [2022-11-25 18:26:17,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386e4f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:26:17, skipping insertion in model container [2022-11-25 18:26:17,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:26:17" (3/3) ... [2022-11-25 18:26:17,586 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2022-11-25 18:26:17,596 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:26:17,609 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:26:17,609 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:26:17,609 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:26:17,765 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 18:26:17,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 257 transitions, 538 flow [2022-11-25 18:26:18,032 INFO L130 PetriNetUnfolder]: 25/254 cut-off events. [2022-11-25 18:26:18,034 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:26:18,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 254 events. 25/254 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 324 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 196. Up to 2 conditions per place. [2022-11-25 18:26:18,044 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 257 transitions, 538 flow [2022-11-25 18:26:18,052 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 243 transitions, 504 flow [2022-11-25 18:26:18,057 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:26:18,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 243 transitions, 504 flow [2022-11-25 18:26:18,085 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 243 transitions, 504 flow [2022-11-25 18:26:18,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 243 transitions, 504 flow [2022-11-25 18:26:18,221 INFO L130 PetriNetUnfolder]: 25/243 cut-off events. [2022-11-25 18:26:18,221 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:26:18,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 243 events. 25/243 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 325 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 196. Up to 2 conditions per place. [2022-11-25 18:26:18,231 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2022-11-25 18:26:27,486 INFO L134 LiptonReduction]: Checked pairs total: 8127 [2022-11-25 18:26:27,486 INFO L136 LiptonReduction]: Total number of compositions: 259 [2022-11-25 18:26:27,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:26:27,510 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;@7eb1578c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:26:27,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 18:26:27,517 INFO L130 PetriNetUnfolder]: 8/33 cut-off events. [2022-11-25 18:26:27,518 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:26:27,518 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:27,519 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:26:27,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:26:27,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:27,525 INFO L85 PathProgramCache]: Analyzing trace with hash 892051751, now seen corresponding path program 1 times [2022-11-25 18:26:27,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:27,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048810536] [2022-11-25 18:26:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:27,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:26:28,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:26:28,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048810536] [2022-11-25 18:26:28,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048810536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:26:28,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:26:28,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:26:28,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519654116] [2022-11-25 18:26:28,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:26:28,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:26:28,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:26:28,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:26:28,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:26:28,258 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 516 [2022-11-25 18:26:28,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:28,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:26:28,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 516 [2022-11-25 18:26:28,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:26:28,746 INFO L130 PetriNetUnfolder]: 1981/2597 cut-off events. [2022-11-25 18:26:28,746 INFO L131 PetriNetUnfolder]: For 142/142 co-relation queries the response was YES. [2022-11-25 18:26:28,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5348 conditions, 2597 events. 1981/2597 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10286 event pairs, 472 based on Foata normal form. 1/1589 useless extension candidates. Maximal degree in co-relation 4569. Up to 1493 conditions per place. [2022-11-25 18:26:28,765 INFO L137 encePairwiseOnDemand]: 511/516 looper letters, 50 selfloop transitions, 4 changer transitions 1/58 dead transitions. [2022-11-25 18:26:28,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 58 transitions, 259 flow [2022-11-25 18:26:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:26:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:26:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 740 transitions. [2022-11-25 18:26:28,792 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2022-11-25 18:26:28,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 740 transitions. [2022-11-25 18:26:28,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 740 transitions. [2022-11-25 18:26:28,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:26:28,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 740 transitions. [2022-11-25 18:26:28,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:28,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 516.0) internal successors, (2064), 4 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:28,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 516.0) internal successors, (2064), 4 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:28,827 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 86 flow. Second operand 3 states and 740 transitions. [2022-11-25 18:26:28,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 58 transitions, 259 flow [2022-11-25 18:26:28,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 58 transitions, 237 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 18:26:28,840 INFO L231 Difference]: Finished difference. Result has 33 places, 37 transitions, 100 flow [2022-11-25 18:26:28,843 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=33, PETRI_TRANSITIONS=37} [2022-11-25 18:26:28,847 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2022-11-25 18:26:28,848 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 37 transitions, 100 flow [2022-11-25 18:26:28,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:28,849 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:28,854 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:26:28,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:26:28,856 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:26:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:28,868 INFO L85 PathProgramCache]: Analyzing trace with hash 509742908, now seen corresponding path program 1 times [2022-11-25 18:26:28,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:28,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303380970] [2022-11-25 18:26:28,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:28,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:26:29,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:26:29,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303380970] [2022-11-25 18:26:29,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303380970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:26:29,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:26:29,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:26:29,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589901909] [2022-11-25 18:26:29,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:26:29,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:26:29,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:26:29,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:26:29,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:26:29,399 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 516 [2022-11-25 18:26:29,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 37 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 218.4) internal successors, (1092), 5 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:29,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:26:29,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 516 [2022-11-25 18:26:29,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:26:29,827 INFO L130 PetriNetUnfolder]: 1931/2549 cut-off events. [2022-11-25 18:26:29,827 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-25 18:26:29,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5675 conditions, 2549 events. 1931/2549 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 9908 event pairs, 796 based on Foata normal form. 0/1776 useless extension candidates. Maximal degree in co-relation 2253. Up to 2034 conditions per place. [2022-11-25 18:26:29,843 INFO L137 encePairwiseOnDemand]: 511/516 looper letters, 50 selfloop transitions, 3 changer transitions 2/57 dead transitions. [2022-11-25 18:26:29,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 262 flow [2022-11-25 18:26:29,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:26:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:26:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1121 transitions. [2022-11-25 18:26:29,847 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43449612403100774 [2022-11-25 18:26:29,847 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1121 transitions. [2022-11-25 18:26:29,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1121 transitions. [2022-11-25 18:26:29,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:26:29,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1121 transitions. [2022-11-25 18:26:29,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 224.2) internal successors, (1121), 5 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:29,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 516.0) internal successors, (3096), 6 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:29,859 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 516.0) internal successors, (3096), 6 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:29,859 INFO L175 Difference]: Start difference. First operand has 33 places, 37 transitions, 100 flow. Second operand 5 states and 1121 transitions. [2022-11-25 18:26:29,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 262 flow [2022-11-25 18:26:29,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:26:29,862 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 112 flow [2022-11-25 18:26:29,862 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2022-11-25 18:26:29,863 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2022-11-25 18:26:29,863 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 112 flow [2022-11-25 18:26:29,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 218.4) internal successors, (1092), 5 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:29,865 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:29,865 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:26:29,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:26:29,865 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:26:29,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:29,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1187242274, now seen corresponding path program 1 times [2022-11-25 18:26:29,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:29,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014964347] [2022-11-25 18:26:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:29,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:26:30,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:26:30,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014964347] [2022-11-25 18:26:30,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014964347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:26:30,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725088712] [2022-11-25 18:26:30,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:30,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:26:30,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:26:30,062 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:26:30,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:26:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:30,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:26:30,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:26:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:26:30,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:26:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:26:30,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725088712] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:26:30,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:26:30,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2022-11-25 18:26:30,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505088312] [2022-11-25 18:26:30,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:26:30,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:26:30,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:26:30,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:26:30,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:26:30,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 516 [2022-11-25 18:26:30,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 216.6) internal successors, (1083), 5 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:30,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:26:30,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 516 [2022-11-25 18:26:30,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:26:30,948 INFO L130 PetriNetUnfolder]: 2197/2912 cut-off events. [2022-11-25 18:26:30,948 INFO L131 PetriNetUnfolder]: For 435/435 co-relation queries the response was YES. [2022-11-25 18:26:30,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6542 conditions, 2912 events. 2197/2912 cut-off events. For 435/435 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12202 event pairs, 602 based on Foata normal form. 0/2274 useless extension candidates. Maximal degree in co-relation 6522. Up to 1451 conditions per place. [2022-11-25 18:26:30,965 INFO L137 encePairwiseOnDemand]: 510/516 looper letters, 48 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2022-11-25 18:26:30,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 264 flow [2022-11-25 18:26:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:26:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:26:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1109 transitions. [2022-11-25 18:26:30,969 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4298449612403101 [2022-11-25 18:26:30,970 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1109 transitions. [2022-11-25 18:26:30,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1109 transitions. [2022-11-25 18:26:30,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:26:30,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1109 transitions. [2022-11-25 18:26:30,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.8) internal successors, (1109), 5 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:30,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 516.0) internal successors, (3096), 6 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:30,982 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 516.0) internal successors, (3096), 6 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:30,983 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 112 flow. Second operand 5 states and 1109 transitions. [2022-11-25 18:26:30,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 264 flow [2022-11-25 18:26:30,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 18:26:30,998 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 128 flow [2022-11-25 18:26:30,998 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2022-11-25 18:26:30,999 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2022-11-25 18:26:31,000 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 128 flow [2022-11-25 18:26:31,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 216.6) internal successors, (1083), 5 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:31,001 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:31,002 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:26:31,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:26:31,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-25 18:26:31,213 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:26:31,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:31,214 INFO L85 PathProgramCache]: Analyzing trace with hash 506178112, now seen corresponding path program 1 times [2022-11-25 18:26:31,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:31,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886149069] [2022-11-25 18:26:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:31,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:26:31,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:26:31,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886149069] [2022-11-25 18:26:31,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886149069] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:26:31,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500769745] [2022-11-25 18:26:31,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:31,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:26:31,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:26:31,475 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:26:31,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:26:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:31,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:26:31,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:26:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:26:31,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:26:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:26:31,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500769745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:26:31,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:26:31,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-11-25 18:26:31,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728936080] [2022-11-25 18:26:31,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:26:31,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:26:31,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:26:31,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:26:31,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:26:32,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 516 [2022-11-25 18:26:32,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 128 flow. Second operand has 14 states, 14 states have (on average 208.78571428571428) internal successors, (2923), 14 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:32,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:26:32,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 516 [2022-11-25 18:26:32,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:26:33,558 INFO L130 PetriNetUnfolder]: 3822/5187 cut-off events. [2022-11-25 18:26:33,558 INFO L131 PetriNetUnfolder]: For 2166/2576 co-relation queries the response was YES. [2022-11-25 18:26:33,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12817 conditions, 5187 events. 3822/5187 cut-off events. For 2166/2576 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22812 event pairs, 456 based on Foata normal form. 410/4817 useless extension candidates. Maximal degree in co-relation 12796. Up to 971 conditions per place. [2022-11-25 18:26:33,589 INFO L137 encePairwiseOnDemand]: 504/516 looper letters, 152 selfloop transitions, 27 changer transitions 0/180 dead transitions. [2022-11-25 18:26:33,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 180 transitions, 945 flow [2022-11-25 18:26:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 18:26:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 18:26:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3041 transitions. [2022-11-25 18:26:33,598 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4209579180509413 [2022-11-25 18:26:33,598 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3041 transitions. [2022-11-25 18:26:33,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3041 transitions. [2022-11-25 18:26:33,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:26:33,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3041 transitions. [2022-11-25 18:26:33,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 217.21428571428572) internal successors, (3041), 14 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:33,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 516.0) internal successors, (7740), 15 states have internal predecessors, (7740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:33,622 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 516.0) internal successors, (7740), 15 states have internal predecessors, (7740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:33,622 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 128 flow. Second operand 14 states and 3041 transitions. [2022-11-25 18:26:33,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 180 transitions, 945 flow [2022-11-25 18:26:33,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 180 transitions, 923 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:26:33,629 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 287 flow [2022-11-25 18:26:33,629 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=287, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2022-11-25 18:26:33,630 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2022-11-25 18:26:33,630 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 287 flow [2022-11-25 18:26:33,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 208.78571428571428) internal successors, (2923), 14 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:33,632 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:33,632 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:26:33,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:26:33,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:26:33,855 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:26:33,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:33,855 INFO L85 PathProgramCache]: Analyzing trace with hash 670469978, now seen corresponding path program 1 times [2022-11-25 18:26:33,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:33,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766586650] [2022-11-25 18:26:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:33,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:26:34,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:26:34,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766586650] [2022-11-25 18:26:34,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766586650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:26:34,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:26:34,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 18:26:34,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662229836] [2022-11-25 18:26:34,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:26:34,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:26:34,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:26:34,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:26:34,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:26:34,367 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 516 [2022-11-25 18:26:34,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 214.16666666666666) internal successors, (1285), 6 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:34,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:26:34,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 516 [2022-11-25 18:26:34,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:26:35,953 INFO L130 PetriNetUnfolder]: 6986/9580 cut-off events. [2022-11-25 18:26:35,954 INFO L131 PetriNetUnfolder]: For 17150/18150 co-relation queries the response was YES. [2022-11-25 18:26:35,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33240 conditions, 9580 events. 6986/9580 cut-off events. For 17150/18150 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 47202 event pairs, 3640 based on Foata normal form. 1244/10816 useless extension candidates. Maximal degree in co-relation 33208. Up to 4906 conditions per place. [2022-11-25 18:26:36,049 INFO L137 encePairwiseOnDemand]: 510/516 looper letters, 112 selfloop transitions, 13 changer transitions 0/128 dead transitions. [2022-11-25 18:26:36,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 128 transitions, 861 flow [2022-11-25 18:26:36,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:26:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:26:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1126 transitions. [2022-11-25 18:26:36,055 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43643410852713177 [2022-11-25 18:26:36,055 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1126 transitions. [2022-11-25 18:26:36,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1126 transitions. [2022-11-25 18:26:36,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:26:36,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1126 transitions. [2022-11-25 18:26:36,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:36,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 516.0) internal successors, (3096), 6 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:36,065 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 516.0) internal successors, (3096), 6 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:36,065 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 287 flow. Second operand 5 states and 1126 transitions. [2022-11-25 18:26:36,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 128 transitions, 861 flow [2022-11-25 18:26:36,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 128 transitions, 855 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:26:36,187 INFO L231 Difference]: Finished difference. Result has 64 places, 70 transitions, 430 flow [2022-11-25 18:26:36,187 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=430, PETRI_PLACES=64, PETRI_TRANSITIONS=70} [2022-11-25 18:26:36,190 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 28 predicate places. [2022-11-25 18:26:36,190 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 70 transitions, 430 flow [2022-11-25 18:26:36,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 214.16666666666666) internal successors, (1285), 6 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:36,191 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:36,191 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:26:36,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:26:36,192 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:26:36,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:36,192 INFO L85 PathProgramCache]: Analyzing trace with hash -125571002, now seen corresponding path program 1 times [2022-11-25 18:26:36,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:36,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810475120] [2022-11-25 18:26:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:36,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:26:36,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:26:36,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810475120] [2022-11-25 18:26:36,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810475120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:26:36,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:26:36,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:26:36,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264446383] [2022-11-25 18:26:36,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:26:36,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:26:36,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:26:36,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:26:36,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:26:37,038 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 516 [2022-11-25 18:26:37,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 70 transitions, 430 flow. Second operand has 6 states, 6 states have (on average 210.33333333333334) internal successors, (1262), 6 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:37,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:26:37,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 516 [2022-11-25 18:26:37,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:26:38,843 INFO L130 PetriNetUnfolder]: 7657/10557 cut-off events. [2022-11-25 18:26:38,844 INFO L131 PetriNetUnfolder]: For 35448/36517 co-relation queries the response was YES. [2022-11-25 18:26:38,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40440 conditions, 10557 events. 7657/10557 cut-off events. For 35448/36517 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 53926 event pairs, 4056 based on Foata normal form. 1070/11537 useless extension candidates. Maximal degree in co-relation 40406. Up to 5089 conditions per place. [2022-11-25 18:26:38,940 INFO L137 encePairwiseOnDemand]: 508/516 looper letters, 120 selfloop transitions, 8 changer transitions 0/134 dead transitions. [2022-11-25 18:26:38,941 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 134 transitions, 1038 flow [2022-11-25 18:26:38,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:26:38,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:26:38,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1311 transitions. [2022-11-25 18:26:38,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42344961240310075 [2022-11-25 18:26:38,945 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1311 transitions. [2022-11-25 18:26:38,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1311 transitions. [2022-11-25 18:26:38,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:26:38,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1311 transitions. [2022-11-25 18:26:38,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 218.5) internal successors, (1311), 6 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:38,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 516.0) internal successors, (3612), 7 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:38,955 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 516.0) internal successors, (3612), 7 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:38,956 INFO L175 Difference]: Start difference. First operand has 64 places, 70 transitions, 430 flow. Second operand 6 states and 1311 transitions. [2022-11-25 18:26:38,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 134 transitions, 1038 flow [2022-11-25 18:26:39,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 134 transitions, 1034 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:26:39,103 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 477 flow [2022-11-25 18:26:39,103 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=477, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2022-11-25 18:26:39,104 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2022-11-25 18:26:39,104 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 477 flow [2022-11-25 18:26:39,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 210.33333333333334) internal successors, (1262), 6 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:39,105 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:39,105 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:26:39,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:26:39,106 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:26:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:39,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1187932664, now seen corresponding path program 2 times [2022-11-25 18:26:39,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:39,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277575429] [2022-11-25 18:26:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:39,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:26:39,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:26:39,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277575429] [2022-11-25 18:26:39,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277575429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:26:39,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955155968] [2022-11-25 18:26:39,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:26:39,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:26:39,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:26:39,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:26:39,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:26:39,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:26:39,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:26:39,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 18:26:39,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:26:40,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:26:40,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-25 18:26:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:26:40,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:26:40,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955155968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:26:40,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:26:40,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2022-11-25 18:26:40,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599910796] [2022-11-25 18:26:40,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:26:40,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:26:40,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:26:40,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:26:40,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:26:40,603 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 516 [2022-11-25 18:26:40,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 208.71428571428572) internal successors, (1461), 7 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:40,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:26:40,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 516 [2022-11-25 18:26:40,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:26:42,367 INFO L130 PetriNetUnfolder]: 8086/11159 cut-off events. [2022-11-25 18:26:42,368 INFO L131 PetriNetUnfolder]: For 41503/42606 co-relation queries the response was YES. [2022-11-25 18:26:42,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45440 conditions, 11159 events. 8086/11159 cut-off events. For 41503/42606 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 57472 event pairs, 4124 based on Foata normal form. 1050/12116 useless extension candidates. Maximal degree in co-relation 45402. Up to 5089 conditions per place. [2022-11-25 18:26:42,487 INFO L137 encePairwiseOnDemand]: 508/516 looper letters, 122 selfloop transitions, 9 changer transitions 0/137 dead transitions. [2022-11-25 18:26:42,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 137 transitions, 1103 flow [2022-11-25 18:26:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:26:42,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:26:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1305 transitions. [2022-11-25 18:26:42,492 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2022-11-25 18:26:42,492 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1305 transitions. [2022-11-25 18:26:42,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1305 transitions. [2022-11-25 18:26:42,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:26:42,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1305 transitions. [2022-11-25 18:26:42,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 217.5) internal successors, (1305), 6 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:42,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 516.0) internal successors, (3612), 7 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:42,505 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 516.0) internal successors, (3612), 7 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:42,505 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 477 flow. Second operand 6 states and 1305 transitions. [2022-11-25 18:26:42,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 137 transitions, 1103 flow [2022-11-25 18:26:42,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 137 transitions, 1096 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:26:42,711 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 519 flow [2022-11-25 18:26:42,711 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=519, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2022-11-25 18:26:42,714 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 37 predicate places. [2022-11-25 18:26:42,715 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 519 flow [2022-11-25 18:26:42,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 208.71428571428572) internal successors, (1461), 7 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:42,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:42,716 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:26:42,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:26:42,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:26:42,923 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:26:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:42,924 INFO L85 PathProgramCache]: Analyzing trace with hash 808279160, now seen corresponding path program 3 times [2022-11-25 18:26:42,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:42,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857370063] [2022-11-25 18:26:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:42,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:26:43,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:26:43,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857370063] [2022-11-25 18:26:43,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857370063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:26:43,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:26:43,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 18:26:43,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444878015] [2022-11-25 18:26:43,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:26:43,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:26:43,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:26:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:26:43,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:26:44,096 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 516 [2022-11-25 18:26:44,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 519 flow. Second operand has 9 states, 9 states have (on average 205.88888888888889) internal successors, (1853), 9 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:44,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:26:44,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 516 [2022-11-25 18:26:44,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:26:45,450 INFO L130 PetriNetUnfolder]: 7131/9876 cut-off events. [2022-11-25 18:26:45,450 INFO L131 PetriNetUnfolder]: For 41041/41837 co-relation queries the response was YES. [2022-11-25 18:26:45,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41630 conditions, 9876 events. 7131/9876 cut-off events. For 41041/41837 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 49769 event pairs, 3653 based on Foata normal form. 856/10658 useless extension candidates. Maximal degree in co-relation 41591. Up to 5089 conditions per place. [2022-11-25 18:26:45,524 INFO L137 encePairwiseOnDemand]: 509/516 looper letters, 107 selfloop transitions, 10 changer transitions 10/133 dead transitions. [2022-11-25 18:26:45,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 133 transitions, 1105 flow [2022-11-25 18:26:45,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:26:45,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:26:45,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1290 transitions. [2022-11-25 18:26:45,528 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2022-11-25 18:26:45,529 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1290 transitions. [2022-11-25 18:26:45,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1290 transitions. [2022-11-25 18:26:45,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:26:45,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1290 transitions. [2022-11-25 18:26:45,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 215.0) internal successors, (1290), 6 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:45,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 516.0) internal successors, (3612), 7 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:45,539 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 516.0) internal successors, (3612), 7 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:45,539 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 519 flow. Second operand 6 states and 1290 transitions. [2022-11-25 18:26:45,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 133 transitions, 1105 flow [2022-11-25 18:26:45,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 133 transitions, 1098 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:26:45,689 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 521 flow [2022-11-25 18:26:45,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=521, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2022-11-25 18:26:45,690 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 40 predicate places. [2022-11-25 18:26:45,690 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 521 flow [2022-11-25 18:26:45,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 205.88888888888889) internal successors, (1853), 9 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:45,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:45,692 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:26:45,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:26:45,692 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:26:45,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:45,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1465778523, now seen corresponding path program 1 times [2022-11-25 18:26:45,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:45,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328107667] [2022-11-25 18:26:45,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:45,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:26:45,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:26:45,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328107667] [2022-11-25 18:26:45,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328107667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:26:45,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657892349] [2022-11-25 18:26:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:45,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:26:45,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:26:45,898 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:26:45,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:26:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:46,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:26:46,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:26:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:26:46,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:26:46,150 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 [2022-11-25 18:26:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:26:46,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657892349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:26:46,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:26:46,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 18:26:46,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159093640] [2022-11-25 18:26:46,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:26:46,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:26:46,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:26:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:26:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:26:46,618 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 516 [2022-11-25 18:26:46,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 521 flow. Second operand has 12 states, 12 states have (on average 208.16666666666666) internal successors, (2498), 12 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:46,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:26:46,621 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 516 [2022-11-25 18:26:46,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:26:48,446 INFO L130 PetriNetUnfolder]: 10124/13978 cut-off events. [2022-11-25 18:26:48,446 INFO L131 PetriNetUnfolder]: For 58577/60011 co-relation queries the response was YES. [2022-11-25 18:26:48,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59686 conditions, 13978 events. 10124/13978 cut-off events. For 58577/60011 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 73235 event pairs, 5079 based on Foata normal form. 1678/15652 useless extension candidates. Maximal degree in co-relation 59646. Up to 4906 conditions per place. [2022-11-25 18:26:48,555 INFO L137 encePairwiseOnDemand]: 510/516 looper letters, 167 selfloop transitions, 22 changer transitions 4/196 dead transitions. [2022-11-25 18:26:48,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 196 transitions, 1568 flow [2022-11-25 18:26:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:26:48,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:26:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1755 transitions. [2022-11-25 18:26:48,568 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4251453488372093 [2022-11-25 18:26:48,568 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1755 transitions. [2022-11-25 18:26:48,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1755 transitions. [2022-11-25 18:26:48,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:26:48,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1755 transitions. [2022-11-25 18:26:48,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 219.375) internal successors, (1755), 8 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:48,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 516.0) internal successors, (4644), 9 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:48,581 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 516.0) internal successors, (4644), 9 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:48,581 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 521 flow. Second operand 8 states and 1755 transitions. [2022-11-25 18:26:48,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 196 transitions, 1568 flow [2022-11-25 18:26:49,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 196 transitions, 1542 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-25 18:26:49,061 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 692 flow [2022-11-25 18:26:49,062 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=692, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2022-11-25 18:26:49,062 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 45 predicate places. [2022-11-25 18:26:49,062 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 692 flow [2022-11-25 18:26:49,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 208.16666666666666) internal successors, (2498), 12 states have internal predecessors, (2498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:49,064 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:49,064 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:26:49,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 18:26:49,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 18:26:49,269 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:26:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:49,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1924381513, now seen corresponding path program 1 times [2022-11-25 18:26:49,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:49,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032677979] [2022-11-25 18:26:49,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:49,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:26:49,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:26:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032677979] [2022-11-25 18:26:49,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032677979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:26:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300528299] [2022-11-25 18:26:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:49,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:26:49,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:26:49,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:26:49,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:26:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:49,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 18:26:49,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:26:50,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:26:50,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 18:26:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:26:50,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:26:50,234 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_366 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_366) c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4))) (+ |c_thread1Thread1of1ForFork2_~j~0#1| 1))) is different from false [2022-11-25 18:26:50,251 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 41 treesize of output 25 [2022-11-25 18:26:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:26:50,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300528299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:26:50,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:26:50,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-11-25 18:26:50,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189000934] [2022-11-25 18:26:50,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:26:50,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 18:26:50,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:26:50,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 18:26:50,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=249, Unknown=1, NotChecked=32, Total=342 [2022-11-25 18:26:50,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 516 [2022-11-25 18:26:50,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 692 flow. Second operand has 19 states, 19 states have (on average 167.47368421052633) internal successors, (3182), 19 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:50,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:26:50,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 516 [2022-11-25 18:26:50,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:26:53,018 INFO L130 PetriNetUnfolder]: 9599/13369 cut-off events. [2022-11-25 18:26:53,019 INFO L131 PetriNetUnfolder]: For 69675/70767 co-relation queries the response was YES. [2022-11-25 18:26:53,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59778 conditions, 13369 events. 9599/13369 cut-off events. For 69675/70767 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 71382 event pairs, 4970 based on Foata normal form. 1152/14431 useless extension candidates. Maximal degree in co-relation 59736. Up to 5089 conditions per place. [2022-11-25 18:26:53,099 INFO L137 encePairwiseOnDemand]: 509/516 looper letters, 164 selfloop transitions, 15 changer transitions 14/199 dead transitions. [2022-11-25 18:26:53,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 199 transitions, 1760 flow [2022-11-25 18:26:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:26:53,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:26:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1596 transitions. [2022-11-25 18:26:53,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.34366925064599485 [2022-11-25 18:26:53,106 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1596 transitions. [2022-11-25 18:26:53,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1596 transitions. [2022-11-25 18:26:53,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:26:53,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1596 transitions. [2022-11-25 18:26:53,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 177.33333333333334) internal successors, (1596), 9 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:53,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 516.0) internal successors, (5160), 10 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:53,119 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 516.0) internal successors, (5160), 10 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:53,120 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 692 flow. Second operand 9 states and 1596 transitions. [2022-11-25 18:26:53,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 199 transitions, 1760 flow [2022-11-25 18:26:53,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 199 transitions, 1680 flow, removed 23 selfloop flow, removed 4 redundant places. [2022-11-25 18:26:53,321 INFO L231 Difference]: Finished difference. Result has 87 places, 87 transitions, 685 flow [2022-11-25 18:26:53,322 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=685, PETRI_PLACES=87, PETRI_TRANSITIONS=87} [2022-11-25 18:26:53,323 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 51 predicate places. [2022-11-25 18:26:53,323 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 87 transitions, 685 flow [2022-11-25 18:26:53,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 167.47368421052633) internal successors, (3182), 19 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:26:53,324 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:26:53,324 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:26:53,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:26:53,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 18:26:53,525 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:26:53,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:53,525 INFO L85 PathProgramCache]: Analyzing trace with hash -333031988, now seen corresponding path program 2 times [2022-11-25 18:26:53,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:53,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430918682] [2022-11-25 18:26:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:53,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:26:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:26:54,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:26:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430918682] [2022-11-25 18:26:54,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430918682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:26:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216004433] [2022-11-25 18:26:54,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:26:54,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:26:54,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:26:54,663 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:26:54,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:26:54,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:26:54,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:26:54,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 18:26:54,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:26:55,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:26:55,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 18:26:55,309 INFO L321 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2022-11-25 18:26:55,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 13 [2022-11-25 18:26:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:26:55,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:26:55,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:26:55,754 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 42 treesize of output 38 [2022-11-25 18:26:55,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-25 18:26:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:26:56,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216004433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:26:56,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:26:56,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 32 [2022-11-25 18:26:56,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965675297] [2022-11-25 18:26:56,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:26:56,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 18:26:56,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:26:56,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 18:26:56,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=917, Unknown=9, NotChecked=0, Total=1056 [2022-11-25 18:27:00,640 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 516 [2022-11-25 18:27:00,643 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 87 transitions, 685 flow. Second operand has 33 states, 33 states have (on average 174.03030303030303) internal successors, (5743), 33 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:00,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:00,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 516 [2022-11-25 18:27:00,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:10,414 INFO L130 PetriNetUnfolder]: 35978/49409 cut-off events. [2022-11-25 18:27:10,414 INFO L131 PetriNetUnfolder]: For 232794/233874 co-relation queries the response was YES. [2022-11-25 18:27:10,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225593 conditions, 49409 events. 35978/49409 cut-off events. For 232794/233874 co-relation queries the response was YES. Maximal size of possible extension queue 1731. Compared 302523 event pairs, 6743 based on Foata normal form. 1164/50547 useless extension candidates. Maximal degree in co-relation 179203. Up to 8969 conditions per place. [2022-11-25 18:27:10,828 INFO L137 encePairwiseOnDemand]: 503/516 looper letters, 487 selfloop transitions, 234 changer transitions 0/723 dead transitions. [2022-11-25 18:27:10,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 723 transitions, 6920 flow [2022-11-25 18:27:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 18:27:10,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-25 18:27:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4632 transitions. [2022-11-25 18:27:10,842 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3590697674418605 [2022-11-25 18:27:10,843 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4632 transitions. [2022-11-25 18:27:10,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4632 transitions. [2022-11-25 18:27:10,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:10,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4632 transitions. [2022-11-25 18:27:10,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 185.28) internal successors, (4632), 25 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:10,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 516.0) internal successors, (13416), 26 states have internal predecessors, (13416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:10,882 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 516.0) internal successors, (13416), 26 states have internal predecessors, (13416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:10,883 INFO L175 Difference]: Start difference. First operand has 87 places, 87 transitions, 685 flow. Second operand 25 states and 4632 transitions. [2022-11-25 18:27:10,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 723 transitions, 6920 flow [2022-11-25 18:27:13,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 723 transitions, 6740 flow, removed 30 selfloop flow, removed 6 redundant places. [2022-11-25 18:27:13,412 INFO L231 Difference]: Finished difference. Result has 120 places, 292 transitions, 3670 flow [2022-11-25 18:27:13,412 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3670, PETRI_PLACES=120, PETRI_TRANSITIONS=292} [2022-11-25 18:27:13,413 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 84 predicate places. [2022-11-25 18:27:13,413 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 292 transitions, 3670 flow [2022-11-25 18:27:13,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 174.03030303030303) internal successors, (5743), 33 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:13,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:13,415 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:27:13,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:27:13,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:27:13,621 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:27:13,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:13,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2011565278, now seen corresponding path program 3 times [2022-11-25 18:27:13,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:27:13,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774035149] [2022-11-25 18:27:13,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:13,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:27:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:27:14,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:27:14,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774035149] [2022-11-25 18:27:14,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774035149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:27:14,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902584191] [2022-11-25 18:27:14,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:27:14,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:27:14,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:27:14,667 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:27:14,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:27:14,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 18:27:14,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:27:14,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 18:27:14,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:15,424 INFO L321 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2022-11-25 18:27:15,424 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 17 treesize of output 13 [2022-11-25 18:27:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:27:15,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:27:15,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:27:15,664 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 20 treesize of output 18 [2022-11-25 18:27:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:27:15,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902584191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:27:15,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:27:15,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 11] total 30 [2022-11-25 18:27:15,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516999354] [2022-11-25 18:27:15,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:27:15,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 18:27:15,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:27:15,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 18:27:15,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-11-25 18:27:19,776 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 516 [2022-11-25 18:27:19,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 292 transitions, 3670 flow. Second operand has 31 states, 31 states have (on average 196.2258064516129) internal successors, (6083), 31 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:19,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:19,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 516 [2022-11-25 18:27:19,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:43,053 INFO L130 PetriNetUnfolder]: 67463/90641 cut-off events. [2022-11-25 18:27:43,053 INFO L131 PetriNetUnfolder]: For 763584/765323 co-relation queries the response was YES. [2022-11-25 18:27:43,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499231 conditions, 90641 events. 67463/90641 cut-off events. For 763584/765323 co-relation queries the response was YES. Maximal size of possible extension queue 2937. Compared 555941 event pairs, 10879 based on Foata normal form. 1891/92486 useless extension candidates. Maximal degree in co-relation 413459. Up to 22470 conditions per place. [2022-11-25 18:27:43,978 INFO L137 encePairwiseOnDemand]: 499/516 looper letters, 1072 selfloop transitions, 899 changer transitions 0/1973 dead transitions. [2022-11-25 18:27:43,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 1973 transitions, 24532 flow [2022-11-25 18:27:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-25 18:27:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-11-25 18:27:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 13021 transitions. [2022-11-25 18:27:44,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4005475575243017 [2022-11-25 18:27:44,005 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 13021 transitions. [2022-11-25 18:27:44,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 13021 transitions. [2022-11-25 18:27:44,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:44,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 13021 transitions. [2022-11-25 18:27:44,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 206.68253968253967) internal successors, (13021), 63 states have internal predecessors, (13021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:44,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 516.0) internal successors, (33024), 64 states have internal predecessors, (33024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:44,071 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 516.0) internal successors, (33024), 64 states have internal predecessors, (33024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:44,072 INFO L175 Difference]: Start difference. First operand has 120 places, 292 transitions, 3670 flow. Second operand 63 states and 13021 transitions. [2022-11-25 18:27:44,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 1973 transitions, 24532 flow [2022-11-25 18:28:13,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 1973 transitions, 24366 flow, removed 82 selfloop flow, removed 1 redundant places. [2022-11-25 18:28:13,623 INFO L231 Difference]: Finished difference. Result has 222 places, 1054 transitions, 17008 flow [2022-11-25 18:28:13,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=516, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=17008, PETRI_PLACES=222, PETRI_TRANSITIONS=1054} [2022-11-25 18:28:13,624 INFO L288 CegarLoopForPetriNet]: 36 programPoint places, 186 predicate places. [2022-11-25 18:28:13,624 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 1054 transitions, 17008 flow [2022-11-25 18:28:13,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 196.2258064516129) internal successors, (6083), 31 states have internal predecessors, (6083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:13,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:13,626 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:28:13,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:28:13,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 18:28:13,833 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:28:13,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:13,834 INFO L85 PathProgramCache]: Analyzing trace with hash -576752832, now seen corresponding path program 4 times [2022-11-25 18:28:13,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:28:13,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138293563] [2022-11-25 18:28:13,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:13,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:28:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:28:15,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:28:15,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138293563] [2022-11-25 18:28:15,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138293563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:28:15,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708823564] [2022-11-25 18:28:15,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:28:15,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:15,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:28:15,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:28:15,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24725451-3007-4a7b-9f3e-7a1b967e97b7/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:28:15,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:28:15,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:28:15,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 18:28:15,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:16,157 INFO L321 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2022-11-25 18:28:16,158 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 17 treesize of output 13 [2022-11-25 18:28:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:28:16,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:28:16,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:28:16,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2022-11-25 18:28:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:28:16,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708823564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:28:16,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:28:16,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 11] total 35 [2022-11-25 18:28:16,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827322130] [2022-11-25 18:28:16,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:28:16,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 18:28:16,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:28:16,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 18:28:16,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 18:28:21,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 516 [2022-11-25 18:28:21,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 1054 transitions, 17008 flow. Second operand has 35 states, 35 states have (on average 186.28571428571428) internal successors, (6520), 35 states have internal predecessors, (6520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:21,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:21,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 516 [2022-11-25 18:28:21,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand