./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.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_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/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_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/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_c684e109-b36d-4936-88ec-d65e1ddb2ff9/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 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- 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 17:52:08,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:52:08,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:52:08,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:52:08,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:52:08,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:52:08,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:52:08,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:52:08,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:52:08,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:52:08,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:52:08,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:52:08,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:52:08,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:52:08,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:52:08,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:52:08,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:52:08,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:52:08,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:52:08,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:52:08,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:52:08,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:52:08,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:52:08,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:52:08,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:52:08,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:52:08,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:52:08,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:52:08,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:52:08,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:52:08,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:52:08,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:52:08,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:52:08,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:52:08,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:52:08,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:52:08,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:52:08,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:52:08,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:52:08,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:52:08,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:52:08,343 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:52:08,382 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:52:08,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:52:08,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:52:08,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:52:08,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:52:08,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:52:08,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:52:08,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:52:08,385 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:52:08,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:52:08,386 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:52:08,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:52:08,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:52:08,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:52:08,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:52:08,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:52:08,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:52:08,387 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:52:08,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:52:08,388 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:52:08,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:52:08,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:52:08,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:52:08,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:52:08,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:52:08,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:52:08,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:52:08,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:52:08,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:52:08,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:52:08,390 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:52:08,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:52:08,391 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:52:08,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:52:08,391 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_c684e109-b36d-4936-88ec-d65e1ddb2ff9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2022-11-25 17:52:08,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:52:08,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:52:08,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:52:08,702 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:52:08,702 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:52:08,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-11-25 17:52:11,703 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:52:11,897 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:52:11,898 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-11-25 17:52:11,912 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/data/c63463d14/00edf26a856c4a5790cdaa899ad75c0c/FLAGf43eac4f0 [2022-11-25 17:52:11,938 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/data/c63463d14/00edf26a856c4a5790cdaa899ad75c0c [2022-11-25 17:52:11,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:52:11,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:52:11,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:52:11,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:52:11,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:52:11,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:52:11" (1/1) ... [2022-11-25 17:52:11,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dbcd080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:11, skipping insertion in model container [2022-11-25 17:52:11,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:52:11" (1/1) ... [2022-11-25 17:52:11,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:52:11,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:52:12,198 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:12,202 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:12,202 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:12,203 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:12,209 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:12,210 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:12,210 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:12,211 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:12,213 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:12,214 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:12,215 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:12,221 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:12,236 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_c684e109-b36d-4936-88ec-d65e1ddb2ff9/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-11-25 17:52:12,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:52:12,270 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:52:12,290 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:12,292 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:12,293 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:12,294 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:12,297 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:12,298 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:12,299 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:12,300 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:12,301 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:12,306 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:12,306 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:52:12,313 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:52:12,320 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_c684e109-b36d-4936-88ec-d65e1ddb2ff9/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-11-25 17:52:12,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:52:12,341 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:52:12,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:12 WrapperNode [2022-11-25 17:52:12,343 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:52:12,344 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:52:12,344 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:52:12,344 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:52:12,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:12" (1/1) ... [2022-11-25 17:52:12,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:12" (1/1) ... [2022-11-25 17:52:12,411 INFO L138 Inliner]: procedures = 25, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 200 [2022-11-25 17:52:12,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:52:12,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:52:12,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:52:12,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:52:12,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:12" (1/1) ... [2022-11-25 17:52:12,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:12" (1/1) ... [2022-11-25 17:52:12,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:12" (1/1) ... [2022-11-25 17:52:12,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:12" (1/1) ... [2022-11-25 17:52:12,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:12" (1/1) ... [2022-11-25 17:52:12,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:12" (1/1) ... [2022-11-25 17:52:12,447 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:12" (1/1) ... [2022-11-25 17:52:12,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:12" (1/1) ... [2022-11-25 17:52:12,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:52:12,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:52:12,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:52:12,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:52:12,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:12" (1/1) ... [2022-11-25 17:52:12,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:52:12,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:12,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:52:12,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:52:12,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:52:12,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:52:12,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:52:12,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:52:12,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:52:12,555 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:52:12,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:52:12,556 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:52:12,556 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:52:12,557 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:52:12,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:52:12,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:52:12,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:52:12,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:52:12,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:52:12,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:52:12,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:52:12,561 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 17:52:12,691 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:52:12,693 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:52:13,144 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:52:13,410 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:52:13,413 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:52:13,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:52:13 BoogieIcfgContainer [2022-11-25 17:52:13,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:52:13,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:52:13,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:52:13,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:52:13,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:52:11" (1/3) ... [2022-11-25 17:52:13,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@498071a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:52:13, skipping insertion in model container [2022-11-25 17:52:13,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:52:12" (2/3) ... [2022-11-25 17:52:13,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@498071a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:52:13, skipping insertion in model container [2022-11-25 17:52:13,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:52:13" (3/3) ... [2022-11-25 17:52:13,458 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2022-11-25 17:52:13,467 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:52:13,478 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:52:13,478 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:52:13,478 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:52:13,565 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:52:13,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 156 transitions, 336 flow [2022-11-25 17:52:13,737 INFO L130 PetriNetUnfolder]: 12/153 cut-off events. [2022-11-25 17:52:13,737 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:52:13,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 153 events. 12/153 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 95 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 114. Up to 2 conditions per place. [2022-11-25 17:52:13,743 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 156 transitions, 336 flow [2022-11-25 17:52:13,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 142 transitions, 302 flow [2022-11-25 17:52:13,756 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:52:13,779 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 142 transitions, 302 flow [2022-11-25 17:52:13,784 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 142 transitions, 302 flow [2022-11-25 17:52:13,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 302 flow [2022-11-25 17:52:13,843 INFO L130 PetriNetUnfolder]: 12/142 cut-off events. [2022-11-25 17:52:13,843 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:52:13,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 142 events. 12/142 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 96 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 114. Up to 2 conditions per place. [2022-11-25 17:52:13,846 INFO L119 LiptonReduction]: Number of co-enabled transitions 1518 [2022-11-25 17:52:20,365 INFO L134 LiptonReduction]: Checked pairs total: 2023 [2022-11-25 17:52:20,365 INFO L136 LiptonReduction]: Total number of compositions: 138 [2022-11-25 17:52:20,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:52:20,409 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;@4de4b0c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:52:20,410 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 17:52:20,423 INFO L130 PetriNetUnfolder]: 4/25 cut-off events. [2022-11-25 17:52:20,424 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:52:20,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:20,425 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] [2022-11-25 17:52:20,425 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 17:52:20,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:20,430 INFO L85 PathProgramCache]: Analyzing trace with hash 65303589, now seen corresponding path program 1 times [2022-11-25 17:52:20,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:20,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093550710] [2022-11-25 17:52:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:20,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:21,069 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 17:52:21,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:21,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093550710] [2022-11-25 17:52:21,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093550710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:21,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:21,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:52:21,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362933993] [2022-11-25 17:52:21,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:21,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:52:21,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:52:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:52:21,137 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 294 [2022-11-25 17:52:21,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 17:52:21,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:21,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 294 [2022-11-25 17:52:21,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:21,342 INFO L130 PetriNetUnfolder]: 619/869 cut-off events. [2022-11-25 17:52:21,342 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-11-25 17:52:21,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1812 conditions, 869 events. 619/869 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3411 event pairs, 95 based on Foata normal form. 1/576 useless extension candidates. Maximal degree in co-relation 1365. Up to 688 conditions per place. [2022-11-25 17:52:21,350 INFO L137 encePairwiseOnDemand]: 289/294 looper letters, 36 selfloop transitions, 4 changer transitions 1/44 dead transitions. [2022-11-25 17:52:21,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 203 flow [2022-11-25 17:52:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:52:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:52:21,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2022-11-25 17:52:21,365 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-11-25 17:52:21,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2022-11-25 17:52:21,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2022-11-25 17:52:21,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:21,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2022-11-25 17:52:21,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 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 17:52:21,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 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 17:52:21,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 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 17:52:21,387 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 70 flow. Second operand 3 states and 441 transitions. [2022-11-25 17:52:21,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 203 flow [2022-11-25 17:52:21,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 44 transitions, 181 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 17:52:21,394 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 84 flow [2022-11-25 17:52:21,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2022-11-25 17:52:21,399 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2022-11-25 17:52:21,399 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 84 flow [2022-11-25 17:52:21,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 17:52:21,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:21,400 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 17:52:21,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:52:21,400 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 17:52:21,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:21,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1144695502, now seen corresponding path program 1 times [2022-11-25 17:52:21,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:21,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139841988] [2022-11-25 17:52:21,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:21,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:21,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:21,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139841988] [2022-11-25 17:52:21,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139841988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:21,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:21,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:52:21,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068734160] [2022-11-25 17:52:21,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:21,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:52:21,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:21,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:52:21,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:52:21,749 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 294 [2022-11-25 17:52:21,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 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 17:52:21,750 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:21,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 294 [2022-11-25 17:52:21,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:22,059 INFO L130 PetriNetUnfolder]: 1155/1690 cut-off events. [2022-11-25 17:52:22,059 INFO L131 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2022-11-25 17:52:22,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3871 conditions, 1690 events. 1155/1690 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 7729 event pairs, 608 based on Foata normal form. 62/1380 useless extension candidates. Maximal degree in co-relation 1013. Up to 880 conditions per place. [2022-11-25 17:52:22,071 INFO L137 encePairwiseOnDemand]: 289/294 looper letters, 60 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2022-11-25 17:52:22,072 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 66 transitions, 316 flow [2022-11-25 17:52:22,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:52:22,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:52:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 703 transitions. [2022-11-25 17:52:22,079 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4782312925170068 [2022-11-25 17:52:22,079 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 703 transitions. [2022-11-25 17:52:22,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 703 transitions. [2022-11-25 17:52:22,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:22,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 703 transitions. [2022-11-25 17:52:22,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 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 17:52:22,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 17:52:22,089 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 17:52:22,089 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 84 flow. Second operand 5 states and 703 transitions. [2022-11-25 17:52:22,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 66 transitions, 316 flow [2022-11-25 17:52:22,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 66 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:22,093 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 110 flow [2022-11-25 17:52:22,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2022-11-25 17:52:22,094 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2022-11-25 17:52:22,094 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 110 flow [2022-11-25 17:52:22,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 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 17:52:22,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:22,096 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:22,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:52:22,096 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 17:52:22,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:22,097 INFO L85 PathProgramCache]: Analyzing trace with hash -482185131, now seen corresponding path program 1 times [2022-11-25 17:52:22,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:22,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440330507] [2022-11-25 17:52:22,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:22,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:22,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:22,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440330507] [2022-11-25 17:52:22,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440330507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:22,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617372258] [2022-11-25 17:52:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:22,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:22,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:22,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:22,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:52:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:22,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:52:22,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:22,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:22,629 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 17:52:22,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617372258] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:22,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:52:22,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-11-25 17:52:22,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959776804] [2022-11-25 17:52:22,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:22,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:52:22,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:52:22,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:52:22,752 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 294 [2022-11-25 17:52:22,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 123.0) internal successors, (861), 7 states have internal predecessors, (861), 0 states have call successors, (0), 0 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 17:52:22,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:22,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 294 [2022-11-25 17:52:22,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:23,355 INFO L130 PetriNetUnfolder]: 1377/2035 cut-off events. [2022-11-25 17:52:23,356 INFO L131 PetriNetUnfolder]: For 685/761 co-relation queries the response was YES. [2022-11-25 17:52:23,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4774 conditions, 2035 events. 1377/2035 cut-off events. For 685/761 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9579 event pairs, 437 based on Foata normal form. 76/1813 useless extension candidates. Maximal degree in co-relation 3286. Up to 520 conditions per place. [2022-11-25 17:52:23,369 INFO L137 encePairwiseOnDemand]: 285/294 looper letters, 105 selfloop transitions, 23 changer transitions 0/130 dead transitions. [2022-11-25 17:52:23,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 130 transitions, 653 flow [2022-11-25 17:52:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:52:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:52:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1315 transitions. [2022-11-25 17:52:23,373 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44727891156462585 [2022-11-25 17:52:23,373 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1315 transitions. [2022-11-25 17:52:23,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1315 transitions. [2022-11-25 17:52:23,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:23,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1315 transitions. [2022-11-25 17:52:23,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.5) internal successors, (1315), 10 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:52:23,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 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 17:52:23,388 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 294.0) internal successors, (3234), 11 states have internal predecessors, (3234), 0 states have call successors, (0), 0 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 17:52:23,390 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 110 flow. Second operand 10 states and 1315 transitions. [2022-11-25 17:52:23,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 130 transitions, 653 flow [2022-11-25 17:52:23,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 130 transitions, 649 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:23,396 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 269 flow [2022-11-25 17:52:23,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=269, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2022-11-25 17:52:23,399 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2022-11-25 17:52:23,399 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 269 flow [2022-11-25 17:52:23,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 123.0) internal successors, (861), 7 states have internal predecessors, (861), 0 states have call successors, (0), 0 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 17:52:23,403 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:23,403 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:23,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:23,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:23,619 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 17:52:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:23,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1676858363, now seen corresponding path program 2 times [2022-11-25 17:52:23,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:23,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134496908] [2022-11-25 17:52:23,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:23,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:23,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:23,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134496908] [2022-11-25 17:52:23,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134496908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:23,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511790929] [2022-11-25 17:52:23,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:52:23,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:23,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:23,786 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:23,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:52:23,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:52:23,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:23,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:52:23,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:24,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:24,092 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 17:52:24,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511790929] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:24,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:52:24,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-11-25 17:52:24,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772803143] [2022-11-25 17:52:24,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:24,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:52:24,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:24,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:52:24,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:52:24,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 294 [2022-11-25 17:52:24,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 269 flow. Second operand has 7 states, 7 states have (on average 123.0) internal successors, (861), 7 states have internal predecessors, (861), 0 states have call successors, (0), 0 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 17:52:24,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:24,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 294 [2022-11-25 17:52:24,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:24,887 INFO L130 PetriNetUnfolder]: 1639/2417 cut-off events. [2022-11-25 17:52:24,887 INFO L131 PetriNetUnfolder]: For 2675/2751 co-relation queries the response was YES. [2022-11-25 17:52:24,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7536 conditions, 2417 events. 1639/2417 cut-off events. For 2675/2751 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 11635 event pairs, 394 based on Foata normal form. 88/2501 useless extension candidates. Maximal degree in co-relation 5518. Up to 594 conditions per place. [2022-11-25 17:52:24,907 INFO L137 encePairwiseOnDemand]: 284/294 looper letters, 112 selfloop transitions, 48 changer transitions 0/162 dead transitions. [2022-11-25 17:52:24,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 162 transitions, 1037 flow [2022-11-25 17:52:24,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:52:24,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:52:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1563 transitions. [2022-11-25 17:52:24,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44302721088435376 [2022-11-25 17:52:24,913 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1563 transitions. [2022-11-25 17:52:24,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1563 transitions. [2022-11-25 17:52:24,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:24,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1563 transitions. [2022-11-25 17:52:24,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 130.25) internal successors, (1563), 12 states have internal predecessors, (1563), 0 states have call successors, (0), 0 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 17:52:24,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 294.0) internal successors, (3822), 13 states have internal predecessors, (3822), 0 states have call successors, (0), 0 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 17:52:24,925 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 294.0) internal successors, (3822), 13 states have internal predecessors, (3822), 0 states have call successors, (0), 0 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 17:52:24,926 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 269 flow. Second operand 12 states and 1563 transitions. [2022-11-25 17:52:24,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 162 transitions, 1037 flow [2022-11-25 17:52:24,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 162 transitions, 1036 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:52:24,950 INFO L231 Difference]: Finished difference. Result has 65 places, 81 transitions, 631 flow [2022-11-25 17:52:24,950 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=631, PETRI_PLACES=65, PETRI_TRANSITIONS=81} [2022-11-25 17:52:24,952 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 33 predicate places. [2022-11-25 17:52:24,952 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 81 transitions, 631 flow [2022-11-25 17:52:24,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 123.0) internal successors, (861), 7 states have internal predecessors, (861), 0 states have call successors, (0), 0 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 17:52:24,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:24,953 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:24,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:25,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:25,164 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 17:52:25,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:25,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1848548192, now seen corresponding path program 1 times [2022-11-25 17:52:25,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:25,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12062979] [2022-11-25 17:52:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:25,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:25,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:25,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12062979] [2022-11-25 17:52:25,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12062979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:25,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:25,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:52:25,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650610699] [2022-11-25 17:52:25,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:25,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:52:25,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:25,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:52:25,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:52:25,435 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 294 [2022-11-25 17:52:25,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 81 transitions, 631 flow. Second operand has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 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 17:52:25,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:25,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 294 [2022-11-25 17:52:25,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:25,826 INFO L130 PetriNetUnfolder]: 1329/1977 cut-off events. [2022-11-25 17:52:25,826 INFO L131 PetriNetUnfolder]: For 6375/6501 co-relation queries the response was YES. [2022-11-25 17:52:25,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7910 conditions, 1977 events. 1329/1977 cut-off events. For 6375/6501 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9335 event pairs, 611 based on Foata normal form. 166/2095 useless extension candidates. Maximal degree in co-relation 6674. Up to 1596 conditions per place. [2022-11-25 17:52:25,844 INFO L137 encePairwiseOnDemand]: 289/294 looper letters, 87 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2022-11-25 17:52:25,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 97 transitions, 835 flow [2022-11-25 17:52:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:52:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:52:25,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 694 transitions. [2022-11-25 17:52:25,847 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47210884353741495 [2022-11-25 17:52:25,848 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 694 transitions. [2022-11-25 17:52:25,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 694 transitions. [2022-11-25 17:52:25,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:25,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 694 transitions. [2022-11-25 17:52:25,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 0 states have call successors, (0), 0 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 17:52:25,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 17:52:25,853 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 17:52:25,853 INFO L175 Difference]: Start difference. First operand has 65 places, 81 transitions, 631 flow. Second operand 5 states and 694 transitions. [2022-11-25 17:52:25,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 97 transitions, 835 flow [2022-11-25 17:52:25,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 97 transitions, 812 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-11-25 17:52:25,882 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 552 flow [2022-11-25 17:52:25,882 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=552, PETRI_PLACES=64, PETRI_TRANSITIONS=72} [2022-11-25 17:52:25,883 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 32 predicate places. [2022-11-25 17:52:25,883 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 552 flow [2022-11-25 17:52:25,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 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 17:52:25,884 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:25,884 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:25,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:52:25,884 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 17:52:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:25,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2119348487, now seen corresponding path program 1 times [2022-11-25 17:52:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:25,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546000004] [2022-11-25 17:52:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:25,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:26,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:26,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546000004] [2022-11-25 17:52:26,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546000004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:52:26,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:52:26,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:52:26,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105875235] [2022-11-25 17:52:26,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:26,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:52:26,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:26,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:52:26,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:52:26,219 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 294 [2022-11-25 17:52:26,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 72 transitions, 552 flow. Second operand has 6 states, 6 states have (on average 130.33333333333334) internal successors, (782), 6 states have internal predecessors, (782), 0 states have call successors, (0), 0 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 17:52:26,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:26,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 294 [2022-11-25 17:52:26,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:26,728 INFO L130 PetriNetUnfolder]: 1159/1722 cut-off events. [2022-11-25 17:52:26,729 INFO L131 PetriNetUnfolder]: For 5033/5084 co-relation queries the response was YES. [2022-11-25 17:52:26,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6859 conditions, 1722 events. 1159/1722 cut-off events. For 5033/5084 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7922 event pairs, 374 based on Foata normal form. 65/1761 useless extension candidates. Maximal degree in co-relation 6454. Up to 1117 conditions per place. [2022-11-25 17:52:26,744 INFO L137 encePairwiseOnDemand]: 288/294 looper letters, 69 selfloop transitions, 5 changer transitions 25/103 dead transitions. [2022-11-25 17:52:26,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 103 transitions, 862 flow [2022-11-25 17:52:26,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:52:26,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:52:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 821 transitions. [2022-11-25 17:52:26,748 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46541950113378683 [2022-11-25 17:52:26,748 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 821 transitions. [2022-11-25 17:52:26,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 821 transitions. [2022-11-25 17:52:26,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:26,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 821 transitions. [2022-11-25 17:52:26,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 136.83333333333334) internal successors, (821), 6 states have internal predecessors, (821), 0 states have call successors, (0), 0 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 17:52:26,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 294.0) internal successors, (2058), 7 states have internal predecessors, (2058), 0 states have call successors, (0), 0 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 17:52:26,754 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 294.0) internal successors, (2058), 7 states have internal predecessors, (2058), 0 states have call successors, (0), 0 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 17:52:26,754 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 552 flow. Second operand 6 states and 821 transitions. [2022-11-25 17:52:26,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 103 transitions, 862 flow [2022-11-25 17:52:26,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 103 transitions, 818 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-11-25 17:52:26,773 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 482 flow [2022-11-25 17:52:26,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=482, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2022-11-25 17:52:26,775 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 31 predicate places. [2022-11-25 17:52:26,776 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 482 flow [2022-11-25 17:52:26,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.33333333333334) internal successors, (782), 6 states have internal predecessors, (782), 0 states have call successors, (0), 0 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 17:52:26,776 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:26,777 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:26,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:52:26,777 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 17:52:26,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:26,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1254940655, now seen corresponding path program 3 times [2022-11-25 17:52:26,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:26,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608241962] [2022-11-25 17:52:26,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:26,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:26,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:26,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608241962] [2022-11-25 17:52:26,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608241962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:26,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200804864] [2022-11-25 17:52:26,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:52:26,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:26,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:26,972 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:26,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:52:27,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:52:27,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:27,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:52:27,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:27,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:27,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200804864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:27,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:27,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-11-25 17:52:27,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837905917] [2022-11-25 17:52:27,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:27,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:52:27,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:27,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:52:27,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:52:27,677 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 294 [2022-11-25 17:52:27,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 482 flow. Second operand has 15 states, 15 states have (on average 123.0) internal successors, (1845), 15 states have internal predecessors, (1845), 0 states have call successors, (0), 0 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 17:52:27,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:27,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 294 [2022-11-25 17:52:27,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:28,591 INFO L130 PetriNetUnfolder]: 1684/2444 cut-off events. [2022-11-25 17:52:28,592 INFO L131 PetriNetUnfolder]: For 5285/5285 co-relation queries the response was YES. [2022-11-25 17:52:28,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9712 conditions, 2444 events. 1684/2444 cut-off events. For 5285/5285 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 11518 event pairs, 237 based on Foata normal form. 16/2457 useless extension candidates. Maximal degree in co-relation 9679. Up to 752 conditions per place. [2022-11-25 17:52:28,612 INFO L137 encePairwiseOnDemand]: 283/294 looper letters, 116 selfloop transitions, 76 changer transitions 0/193 dead transitions. [2022-11-25 17:52:28,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 193 transitions, 1580 flow [2022-11-25 17:52:28,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:52:28,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:52:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1689 transitions. [2022-11-25 17:52:28,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44191522762951335 [2022-11-25 17:52:28,618 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1689 transitions. [2022-11-25 17:52:28,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1689 transitions. [2022-11-25 17:52:28,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:28,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1689 transitions. [2022-11-25 17:52:28,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 129.92307692307693) internal successors, (1689), 13 states have internal predecessors, (1689), 0 states have call successors, (0), 0 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 17:52:28,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 17:52:28,632 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 17:52:28,633 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 482 flow. Second operand 13 states and 1689 transitions. [2022-11-25 17:52:28,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 193 transitions, 1580 flow [2022-11-25 17:52:28,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 193 transitions, 1545 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-11-25 17:52:28,668 INFO L231 Difference]: Finished difference. Result has 73 places, 108 transitions, 1180 flow [2022-11-25 17:52:28,669 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1180, PETRI_PLACES=73, PETRI_TRANSITIONS=108} [2022-11-25 17:52:28,669 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 41 predicate places. [2022-11-25 17:52:28,670 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 108 transitions, 1180 flow [2022-11-25 17:52:28,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 123.0) internal successors, (1845), 15 states have internal predecessors, (1845), 0 states have call successors, (0), 0 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 17:52:28,671 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:28,671 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:28,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:28,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 17:52:28,876 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 17:52:28,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:28,876 INFO L85 PathProgramCache]: Analyzing trace with hash 449359637, now seen corresponding path program 4 times [2022-11-25 17:52:28,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:28,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912761404] [2022-11-25 17:52:28,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:28,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:29,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:29,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912761404] [2022-11-25 17:52:29,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912761404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:29,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93414704] [2022-11-25 17:52:29,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:52:29,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:29,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:29,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:29,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:52:29,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:52:29,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:29,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:52:29,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:29,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:29,391 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 17:52:29,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93414704] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:29,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:52:29,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2022-11-25 17:52:29,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789578261] [2022-11-25 17:52:29,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:29,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:52:29,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:29,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:52:29,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:52:29,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 294 [2022-11-25 17:52:29,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 108 transitions, 1180 flow. Second operand has 7 states, 7 states have (on average 123.0) internal successors, (861), 7 states have internal predecessors, (861), 0 states have call successors, (0), 0 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 17:52:29,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:29,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 294 [2022-11-25 17:52:29,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:30,031 INFO L130 PetriNetUnfolder]: 1724/2508 cut-off events. [2022-11-25 17:52:30,031 INFO L131 PetriNetUnfolder]: For 9153/9153 co-relation queries the response was YES. [2022-11-25 17:52:30,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12017 conditions, 2508 events. 1724/2508 cut-off events. For 9153/9153 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 12029 event pairs, 253 based on Foata normal form. 16/2521 useless extension candidates. Maximal degree in co-relation 11978. Up to 842 conditions per place. [2022-11-25 17:52:30,056 INFO L137 encePairwiseOnDemand]: 283/294 looper letters, 87 selfloop transitions, 67 changer transitions 0/155 dead transitions. [2022-11-25 17:52:30,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 155 transitions, 1740 flow [2022-11-25 17:52:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:52:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:52:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1037 transitions. [2022-11-25 17:52:30,060 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4409013605442177 [2022-11-25 17:52:30,060 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1037 transitions. [2022-11-25 17:52:30,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1037 transitions. [2022-11-25 17:52:30,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:30,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1037 transitions. [2022-11-25 17:52:30,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 129.625) internal successors, (1037), 8 states have internal predecessors, (1037), 0 states have call successors, (0), 0 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 17:52:30,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 17:52:30,068 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 17:52:30,068 INFO L175 Difference]: Start difference. First operand has 73 places, 108 transitions, 1180 flow. Second operand 8 states and 1037 transitions. [2022-11-25 17:52:30,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 155 transitions, 1740 flow [2022-11-25 17:52:30,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 155 transitions, 1674 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-11-25 17:52:30,129 INFO L231 Difference]: Finished difference. Result has 79 places, 116 transitions, 1454 flow [2022-11-25 17:52:30,130 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1454, PETRI_PLACES=79, PETRI_TRANSITIONS=116} [2022-11-25 17:52:30,133 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 47 predicate places. [2022-11-25 17:52:30,133 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 116 transitions, 1454 flow [2022-11-25 17:52:30,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 123.0) internal successors, (861), 7 states have internal predecessors, (861), 0 states have call successors, (0), 0 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 17:52:30,134 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:30,134 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:30,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:30,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:30,340 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 17:52:30,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:30,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1417402535, now seen corresponding path program 5 times [2022-11-25 17:52:30,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:30,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237419391] [2022-11-25 17:52:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:30,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:30,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:30,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237419391] [2022-11-25 17:52:30,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237419391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:30,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012228582] [2022-11-25 17:52:30,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:52:30,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:30,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:30,565 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:30,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:52:30,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:52:30,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:30,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:52:30,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:30,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:30,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012228582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:30,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:30,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-25 17:52:30,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821616484] [2022-11-25 17:52:30,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:30,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:52:30,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:30,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:52:30,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:52:31,155 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 294 [2022-11-25 17:52:31,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 116 transitions, 1454 flow. Second operand has 15 states, 15 states have (on average 119.93333333333334) internal successors, (1799), 15 states have internal predecessors, (1799), 0 states have call successors, (0), 0 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 17:52:31,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:31,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 294 [2022-11-25 17:52:31,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:32,402 INFO L130 PetriNetUnfolder]: 1911/2801 cut-off events. [2022-11-25 17:52:32,402 INFO L131 PetriNetUnfolder]: For 15172/15172 co-relation queries the response was YES. [2022-11-25 17:52:32,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14763 conditions, 2801 events. 1911/2801 cut-off events. For 15172/15172 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 12765 event pairs, 28 based on Foata normal form. 14/2814 useless extension candidates. Maximal degree in co-relation 14721. Up to 755 conditions per place. [2022-11-25 17:52:32,430 INFO L137 encePairwiseOnDemand]: 283/294 looper letters, 175 selfloop transitions, 150 changer transitions 0/325 dead transitions. [2022-11-25 17:52:32,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 325 transitions, 3984 flow [2022-11-25 17:52:32,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:52:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 17:52:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2645 transitions. [2022-11-25 17:52:32,437 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4284094590217039 [2022-11-25 17:52:32,437 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2645 transitions. [2022-11-25 17:52:32,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2645 transitions. [2022-11-25 17:52:32,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:32,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2645 transitions. [2022-11-25 17:52:32,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 125.95238095238095) internal successors, (2645), 21 states have internal predecessors, (2645), 0 states have call successors, (0), 0 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 17:52:32,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 294.0) internal successors, (6468), 22 states have internal predecessors, (6468), 0 states have call successors, (0), 0 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 17:52:32,454 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 294.0) internal successors, (6468), 22 states have internal predecessors, (6468), 0 states have call successors, (0), 0 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 17:52:32,454 INFO L175 Difference]: Start difference. First operand has 79 places, 116 transitions, 1454 flow. Second operand 21 states and 2645 transitions. [2022-11-25 17:52:32,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 325 transitions, 3984 flow [2022-11-25 17:52:32,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 325 transitions, 3808 flow, removed 24 selfloop flow, removed 4 redundant places. [2022-11-25 17:52:32,562 INFO L231 Difference]: Finished difference. Result has 105 places, 198 transitions, 2918 flow [2022-11-25 17:52:32,562 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2918, PETRI_PLACES=105, PETRI_TRANSITIONS=198} [2022-11-25 17:52:32,563 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 73 predicate places. [2022-11-25 17:52:32,564 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 198 transitions, 2918 flow [2022-11-25 17:52:32,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 119.93333333333334) internal successors, (1799), 15 states have internal predecessors, (1799), 0 states have call successors, (0), 0 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 17:52:32,565 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:32,565 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:52:32,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:32,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:32,771 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 17:52:32,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:32,771 INFO L85 PathProgramCache]: Analyzing trace with hash -63847465, now seen corresponding path program 6 times [2022-11-25 17:52:32,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:32,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709796262] [2022-11-25 17:52:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:32,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:32,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:32,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709796262] [2022-11-25 17:52:32,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709796262] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:32,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903559305] [2022-11-25 17:52:32,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:52:32,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:32,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:32,901 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:32,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:52:33,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 17:52:33,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:33,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:52:33,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:52:33,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:33,264 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 17:52:33,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903559305] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:33,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:52:33,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-11-25 17:52:33,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942679752] [2022-11-25 17:52:33,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:33,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:52:33,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:33,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:52:33,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:52:33,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 294 [2022-11-25 17:52:33,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 198 transitions, 2918 flow. Second operand has 7 states, 7 states have (on average 123.0) internal successors, (861), 7 states have internal predecessors, (861), 0 states have call successors, (0), 0 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 17:52:33,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:33,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 294 [2022-11-25 17:52:33,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:34,052 INFO L130 PetriNetUnfolder]: 1835/2695 cut-off events. [2022-11-25 17:52:34,052 INFO L131 PetriNetUnfolder]: For 19154/19160 co-relation queries the response was YES. [2022-11-25 17:52:34,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15532 conditions, 2695 events. 1835/2695 cut-off events. For 19154/19160 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 12292 event pairs, 210 based on Foata normal form. 20/2712 useless extension candidates. Maximal degree in co-relation 15480. Up to 763 conditions per place. [2022-11-25 17:52:34,082 INFO L137 encePairwiseOnDemand]: 284/294 looper letters, 80 selfloop transitions, 145 changer transitions 0/234 dead transitions. [2022-11-25 17:52:34,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 234 transitions, 3504 flow [2022-11-25 17:52:34,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:52:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 17:52:34,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1034 transitions. [2022-11-25 17:52:34,085 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43962585034013607 [2022-11-25 17:52:34,086 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1034 transitions. [2022-11-25 17:52:34,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1034 transitions. [2022-11-25 17:52:34,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:34,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1034 transitions. [2022-11-25 17:52:34,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 129.25) internal successors, (1034), 8 states have internal predecessors, (1034), 0 states have call successors, (0), 0 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 17:52:34,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 17:52:34,093 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 294.0) internal successors, (2646), 9 states have internal predecessors, (2646), 0 states have call successors, (0), 0 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 17:52:34,094 INFO L175 Difference]: Start difference. First operand has 105 places, 198 transitions, 2918 flow. Second operand 8 states and 1034 transitions. [2022-11-25 17:52:34,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 234 transitions, 3504 flow [2022-11-25 17:52:34,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 234 transitions, 3405 flow, removed 28 selfloop flow, removed 3 redundant places. [2022-11-25 17:52:34,250 INFO L231 Difference]: Finished difference. Result has 112 places, 200 transitions, 3342 flow [2022-11-25 17:52:34,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3342, PETRI_PLACES=112, PETRI_TRANSITIONS=200} [2022-11-25 17:52:34,251 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 80 predicate places. [2022-11-25 17:52:34,251 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 200 transitions, 3342 flow [2022-11-25 17:52:34,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 123.0) internal successors, (861), 7 states have internal predecessors, (861), 0 states have call successors, (0), 0 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 17:52:34,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:34,252 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] [2022-11-25 17:52:34,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:34,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:52:34,468 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 17:52:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1941514757, now seen corresponding path program 1 times [2022-11-25 17:52:34,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:34,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319689182] [2022-11-25 17:52:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:34,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:34,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:34,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319689182] [2022-11-25 17:52:34,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319689182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:34,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986465415] [2022-11-25 17:52:34,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:34,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:34,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:34,587 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:34,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:52:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:34,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:52:34,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:34,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:34,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986465415] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:34,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:52:34,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2022-11-25 17:52:34,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834088119] [2022-11-25 17:52:34,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:52:34,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:52:34,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:34,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:52:34,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:52:34,847 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 294 [2022-11-25 17:52:34,848 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 200 transitions, 3342 flow. Second operand has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 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 17:52:34,848 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:34,848 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 294 [2022-11-25 17:52:34,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:35,372 INFO L130 PetriNetUnfolder]: 1660/2400 cut-off events. [2022-11-25 17:52:35,372 INFO L131 PetriNetUnfolder]: For 28875/29252 co-relation queries the response was YES. [2022-11-25 17:52:35,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15310 conditions, 2400 events. 1660/2400 cut-off events. For 28875/29252 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 10948 event pairs, 449 based on Foata normal form. 338/2681 useless extension candidates. Maximal degree in co-relation 15255. Up to 1820 conditions per place. [2022-11-25 17:52:35,402 INFO L137 encePairwiseOnDemand]: 289/294 looper letters, 241 selfloop transitions, 13 changer transitions 0/273 dead transitions. [2022-11-25 17:52:35,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 273 transitions, 4972 flow [2022-11-25 17:52:35,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:52:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:52:35,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 668 transitions. [2022-11-25 17:52:35,405 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.454421768707483 [2022-11-25 17:52:35,405 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 668 transitions. [2022-11-25 17:52:35,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 668 transitions. [2022-11-25 17:52:35,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:35,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 668 transitions. [2022-11-25 17:52:35,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.6) internal successors, (668), 5 states have internal predecessors, (668), 0 states have call successors, (0), 0 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 17:52:35,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 17:52:35,419 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 294.0) internal successors, (1764), 6 states have internal predecessors, (1764), 0 states have call successors, (0), 0 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 17:52:35,419 INFO L175 Difference]: Start difference. First operand has 112 places, 200 transitions, 3342 flow. Second operand 5 states and 668 transitions. [2022-11-25 17:52:35,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 273 transitions, 4972 flow [2022-11-25 17:52:35,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 273 transitions, 4879 flow, removed 10 selfloop flow, removed 5 redundant places. [2022-11-25 17:52:35,613 INFO L231 Difference]: Finished difference. Result has 112 places, 201 transitions, 3320 flow [2022-11-25 17:52:35,613 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=3275, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3320, PETRI_PLACES=112, PETRI_TRANSITIONS=201} [2022-11-25 17:52:35,614 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 80 predicate places. [2022-11-25 17:52:35,614 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 201 transitions, 3320 flow [2022-11-25 17:52:35,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 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 17:52:35,614 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:35,615 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 17:52:35,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 17:52:35,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:52:35,815 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 17:52:35,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:35,816 INFO L85 PathProgramCache]: Analyzing trace with hash -143200041, now seen corresponding path program 1 times [2022-11-25 17:52:35,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:35,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565603731] [2022-11-25 17:52:35,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:35,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:36,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:36,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565603731] [2022-11-25 17:52:36,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565603731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:36,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924598516] [2022-11-25 17:52:36,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:36,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:36,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:36,727 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:36,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:52:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:36,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-25 17:52:36,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:36,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:52:37,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:52:37,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:52:37,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:52:37,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:37,337 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 33 treesize of output 23 [2022-11-25 17:52:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:37,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:38,601 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_436 (Array Int Int)) (v_ArrVal_437 (Array Int Int)) (~M~0 Int)) (or (<= (+ 2 ~M~0) c_~N~0) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_436) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_437) c_~A~0.base))) (= (+ c_~res2~0 (select .cse0 (+ c_~A~0.offset (* ~M~0 4)))) (+ (select .cse0 c_~A~0.offset) c_~res1~0))) (not (< ~M~0 c_~N~0)))) is different from false [2022-11-25 17:52:38,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:38,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2022-11-25 17:52:38,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:38,750 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 806 treesize of output 768 [2022-11-25 17:52:38,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:38,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 758 treesize of output 704 [2022-11-25 17:52:38,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:38,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 694 treesize of output 576 [2022-11-25 17:52:38,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:38,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 566 treesize of output 544 [2022-11-25 17:52:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:39,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924598516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:39,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:39,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11] total 25 [2022-11-25 17:52:39,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525765043] [2022-11-25 17:52:39,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:39,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:52:39,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:39,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:52:39,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=529, Unknown=7, NotChecked=48, Total=702 [2022-11-25 17:52:39,645 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 294 [2022-11-25 17:52:39,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 201 transitions, 3320 flow. Second operand has 27 states, 27 states have (on average 86.92592592592592) internal successors, (2347), 27 states have internal predecessors, (2347), 0 states have call successors, (0), 0 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 17:52:39,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:39,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 294 [2022-11-25 17:52:39,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:42,091 INFO L130 PetriNetUnfolder]: 3216/4731 cut-off events. [2022-11-25 17:52:42,091 INFO L131 PetriNetUnfolder]: For 53614/53780 co-relation queries the response was YES. [2022-11-25 17:52:42,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30991 conditions, 4731 events. 3216/4731 cut-off events. For 53614/53780 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 23830 event pairs, 225 based on Foata normal form. 140/4850 useless extension candidates. Maximal degree in co-relation 28895. Up to 2466 conditions per place. [2022-11-25 17:52:42,221 INFO L137 encePairwiseOnDemand]: 284/294 looper letters, 316 selfloop transitions, 268 changer transitions 3/595 dead transitions. [2022-11-25 17:52:42,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 595 transitions, 10027 flow [2022-11-25 17:52:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:52:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:52:42,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1776 transitions. [2022-11-25 17:52:42,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.317937701396348 [2022-11-25 17:52:42,236 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1776 transitions. [2022-11-25 17:52:42,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1776 transitions. [2022-11-25 17:52:42,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:42,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1776 transitions. [2022-11-25 17:52:42,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 93.47368421052632) internal successors, (1776), 19 states have internal predecessors, (1776), 0 states have call successors, (0), 0 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 17:52:42,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 294.0) internal successors, (5880), 20 states have internal predecessors, (5880), 0 states have call successors, (0), 0 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 17:52:42,254 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 294.0) internal successors, (5880), 20 states have internal predecessors, (5880), 0 states have call successors, (0), 0 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 17:52:42,254 INFO L175 Difference]: Start difference. First operand has 112 places, 201 transitions, 3320 flow. Second operand 19 states and 1776 transitions. [2022-11-25 17:52:42,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 595 transitions, 10027 flow [2022-11-25 17:52:42,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 595 transitions, 9954 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-11-25 17:52:42,586 INFO L231 Difference]: Finished difference. Result has 136 places, 409 transitions, 7982 flow [2022-11-25 17:52:42,586 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=3301, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7982, PETRI_PLACES=136, PETRI_TRANSITIONS=409} [2022-11-25 17:52:42,587 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 104 predicate places. [2022-11-25 17:52:42,587 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 409 transitions, 7982 flow [2022-11-25 17:52:42,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 86.92592592592592) internal successors, (2347), 27 states have internal predecessors, (2347), 0 states have call successors, (0), 0 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 17:52:42,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:42,589 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 17:52:42,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:42,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:42,795 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 17:52:42,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:42,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1062878419, now seen corresponding path program 2 times [2022-11-25 17:52:42,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:42,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721477022] [2022-11-25 17:52:42,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:42,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:43,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:43,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721477022] [2022-11-25 17:52:43,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721477022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:43,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566549234] [2022-11-25 17:52:43,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:52:43,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:43,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:43,563 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:43,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:52:43,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:52:43,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:43,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 17:52:43,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:44,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:44,050 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 17 [2022-11-25 17:52:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:44,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:44,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:44,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2022-11-25 17:52:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:44,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566549234] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:44,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:44,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 25 [2022-11-25 17:52:44,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787938822] [2022-11-25 17:52:44,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:44,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:52:44,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:44,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:52:44,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-11-25 17:52:45,767 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 294 [2022-11-25 17:52:45,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 409 transitions, 7982 flow. Second operand has 27 states, 27 states have (on average 106.11111111111111) internal successors, (2865), 27 states have internal predecessors, (2865), 0 states have call successors, (0), 0 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 17:52:45,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:45,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 294 [2022-11-25 17:52:45,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:52:47,909 INFO L130 PetriNetUnfolder]: 3836/5660 cut-off events. [2022-11-25 17:52:47,910 INFO L131 PetriNetUnfolder]: For 74054/74054 co-relation queries the response was YES. [2022-11-25 17:52:47,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40848 conditions, 5660 events. 3836/5660 cut-off events. For 74054/74054 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 28592 event pairs, 566 based on Foata normal form. 1/5661 useless extension candidates. Maximal degree in co-relation 39654. Up to 4048 conditions per place. [2022-11-25 17:52:47,982 INFO L137 encePairwiseOnDemand]: 281/294 looper letters, 357 selfloop transitions, 286 changer transitions 6/649 dead transitions. [2022-11-25 17:52:47,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 649 transitions, 12780 flow [2022-11-25 17:52:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:52:47,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:52:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1582 transitions. [2022-11-25 17:52:47,986 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2022-11-25 17:52:47,986 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1582 transitions. [2022-11-25 17:52:47,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1582 transitions. [2022-11-25 17:52:47,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:52:47,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1582 transitions. [2022-11-25 17:52:47,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 113.0) internal successors, (1582), 14 states have internal predecessors, (1582), 0 states have call successors, (0), 0 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 17:52:47,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 294.0) internal successors, (4410), 15 states have internal predecessors, (4410), 0 states have call successors, (0), 0 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 17:52:47,996 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 294.0) internal successors, (4410), 15 states have internal predecessors, (4410), 0 states have call successors, (0), 0 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 17:52:47,997 INFO L175 Difference]: Start difference. First operand has 136 places, 409 transitions, 7982 flow. Second operand 14 states and 1582 transitions. [2022-11-25 17:52:47,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 649 transitions, 12780 flow [2022-11-25 17:52:48,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 649 transitions, 12380 flow, removed 117 selfloop flow, removed 2 redundant places. [2022-11-25 17:52:48,649 INFO L231 Difference]: Finished difference. Result has 156 places, 514 transitions, 10870 flow [2022-11-25 17:52:48,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=7691, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10870, PETRI_PLACES=156, PETRI_TRANSITIONS=514} [2022-11-25 17:52:48,649 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 124 predicate places. [2022-11-25 17:52:48,650 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 514 transitions, 10870 flow [2022-11-25 17:52:48,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 106.11111111111111) internal successors, (2865), 27 states have internal predecessors, (2865), 0 states have call successors, (0), 0 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 17:52:48,650 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:52:48,651 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 17:52:48,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:52:48,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:52:48,851 INFO L420 AbstractCegarLoop]: === Iteration 14 === 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 17:52:48,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:52:48,852 INFO L85 PathProgramCache]: Analyzing trace with hash -81925113, now seen corresponding path program 3 times [2022-11-25 17:52:48,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:52:48,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231100492] [2022-11-25 17:52:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:52:48,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:52:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:52:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:49,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:52:49,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231100492] [2022-11-25 17:52:49,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231100492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:52:49,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432860157] [2022-11-25 17:52:49,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:52:49,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:52:49,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:52:49,596 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:52:49,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:52:49,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:52:49,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:52:49,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 17:52:49,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:52:50,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:50,012 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 17 [2022-11-25 17:52:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:50,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:52:50,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:52:50,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2022-11-25 17:52:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:52:50,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432860157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:52:50,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:52:50,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 27 [2022-11-25 17:52:50,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029673127] [2022-11-25 17:52:50,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:52:50,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 17:52:50,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:52:50,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 17:52:50,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-11-25 17:52:51,855 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 294 [2022-11-25 17:52:51,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 514 transitions, 10870 flow. Second operand has 29 states, 29 states have (on average 106.03448275862068) internal successors, (3075), 29 states have internal predecessors, (3075), 0 states have call successors, (0), 0 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 17:52:51,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:52:51,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 294 [2022-11-25 17:52:51,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:00,511 INFO L130 PetriNetUnfolder]: 8008/11967 cut-off events. [2022-11-25 17:53:00,511 INFO L131 PetriNetUnfolder]: For 186350/186350 co-relation queries the response was YES. [2022-11-25 17:53:00,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92373 conditions, 11967 events. 8008/11967 cut-off events. For 186350/186350 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 71487 event pairs, 307 based on Foata normal form. 4/11971 useless extension candidates. Maximal degree in co-relation 91158. Up to 4734 conditions per place. [2022-11-25 17:53:00,672 INFO L137 encePairwiseOnDemand]: 277/294 looper letters, 617 selfloop transitions, 935 changer transitions 12/1564 dead transitions. [2022-11-25 17:53:00,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 1564 transitions, 28332 flow [2022-11-25 17:53:00,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-25 17:53:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-11-25 17:53:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 9126 transitions. [2022-11-25 17:53:00,688 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3832199546485261 [2022-11-25 17:53:00,689 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 9126 transitions. [2022-11-25 17:53:00,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 9126 transitions. [2022-11-25 17:53:00,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:00,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 9126 transitions. [2022-11-25 17:53:00,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 112.66666666666667) internal successors, (9126), 81 states have internal predecessors, (9126), 0 states have call successors, (0), 0 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 17:53:00,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 294.0) internal successors, (24108), 82 states have internal predecessors, (24108), 0 states have call successors, (0), 0 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 17:53:00,741 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 294.0) internal successors, (24108), 82 states have internal predecessors, (24108), 0 states have call successors, (0), 0 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 17:53:00,742 INFO L175 Difference]: Start difference. First operand has 156 places, 514 transitions, 10870 flow. Second operand 81 states and 9126 transitions. [2022-11-25 17:53:00,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 1564 transitions, 28332 flow [2022-11-25 17:53:02,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 1564 transitions, 28227 flow, removed 50 selfloop flow, removed 2 redundant places. [2022-11-25 17:53:02,434 INFO L231 Difference]: Finished difference. Result has 250 places, 1121 transitions, 25544 flow [2022-11-25 17:53:02,435 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=10811, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=25544, PETRI_PLACES=250, PETRI_TRANSITIONS=1121} [2022-11-25 17:53:02,435 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 218 predicate places. [2022-11-25 17:53:02,435 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 1121 transitions, 25544 flow [2022-11-25 17:53:02,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 106.03448275862068) internal successors, (3075), 29 states have internal predecessors, (3075), 0 states have call successors, (0), 0 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 17:53:02,436 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:02,437 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 17:53:02,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:02,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:53:02,643 INFO L420 AbstractCegarLoop]: === Iteration 15 === 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 17:53:02,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:02,643 INFO L85 PathProgramCache]: Analyzing trace with hash -374322446, now seen corresponding path program 1 times [2022-11-25 17:53:02,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:02,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632116168] [2022-11-25 17:53:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:02,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:03,177 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 17:53:03,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:03,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632116168] [2022-11-25 17:53:03,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632116168] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:03,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948408248] [2022-11-25 17:53:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:03,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:03,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:03,179 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:03,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:53:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:03,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-25 17:53:03,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:03,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:53:03,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:53:03,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:53:03,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:53:03,605 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 15 treesize of output 7 [2022-11-25 17:53:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:03,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:03,720 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 17:53:03,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948408248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:03,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:03,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 5] total 15 [2022-11-25 17:53:03,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680867928] [2022-11-25 17:53:03,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:03,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:53:03,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:03,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:53:03,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:53:04,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 294 [2022-11-25 17:53:04,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 1121 transitions, 25544 flow. Second operand has 17 states, 17 states have (on average 114.82352941176471) internal successors, (1952), 17 states have internal predecessors, (1952), 0 states have call successors, (0), 0 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 17:53:04,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:04,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 294 [2022-11-25 17:53:04,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:10,557 INFO L130 PetriNetUnfolder]: 11298/16886 cut-off events. [2022-11-25 17:53:10,557 INFO L131 PetriNetUnfolder]: For 343637/343991 co-relation queries the response was YES. [2022-11-25 17:53:10,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147128 conditions, 16886 events. 11298/16886 cut-off events. For 343637/343991 co-relation queries the response was YES. Maximal size of possible extension queue 896. Compared 107168 event pairs, 1136 based on Foata normal form. 179/16955 useless extension candidates. Maximal degree in co-relation 146764. Up to 10394 conditions per place. [2022-11-25 17:53:10,889 INFO L137 encePairwiseOnDemand]: 283/294 looper letters, 893 selfloop transitions, 720 changer transitions 1/1650 dead transitions. [2022-11-25 17:53:10,889 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 1650 transitions, 38975 flow [2022-11-25 17:53:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:53:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:53:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1490 transitions. [2022-11-25 17:53:10,893 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4223356009070295 [2022-11-25 17:53:10,894 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1490 transitions. [2022-11-25 17:53:10,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1490 transitions. [2022-11-25 17:53:10,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:10,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1490 transitions. [2022-11-25 17:53:10,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 124.16666666666667) internal successors, (1490), 12 states have internal predecessors, (1490), 0 states have call successors, (0), 0 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 17:53:10,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 294.0) internal successors, (3822), 13 states have internal predecessors, (3822), 0 states have call successors, (0), 0 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 17:53:10,906 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 294.0) internal successors, (3822), 13 states have internal predecessors, (3822), 0 states have call successors, (0), 0 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 17:53:10,906 INFO L175 Difference]: Start difference. First operand has 250 places, 1121 transitions, 25544 flow. Second operand 12 states and 1490 transitions. [2022-11-25 17:53:10,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 1650 transitions, 38975 flow [2022-11-25 17:53:16,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 1650 transitions, 36789 flow, removed 823 selfloop flow, removed 9 redundant places. [2022-11-25 17:53:16,807 INFO L231 Difference]: Finished difference. Result has 259 places, 1439 transitions, 32815 flow [2022-11-25 17:53:16,808 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=24053, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=32815, PETRI_PLACES=259, PETRI_TRANSITIONS=1439} [2022-11-25 17:53:16,809 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 227 predicate places. [2022-11-25 17:53:16,809 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 1439 transitions, 32815 flow [2022-11-25 17:53:16,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 114.82352941176471) internal successors, (1952), 17 states have internal predecessors, (1952), 0 states have call successors, (0), 0 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 17:53:16,809 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:16,810 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 17:53:16,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:17,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:17,016 INFO L420 AbstractCegarLoop]: === Iteration 16 === 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 17:53:17,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:17,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1999393163, now seen corresponding path program 4 times [2022-11-25 17:53:17,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:17,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156638651] [2022-11-25 17:53:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:17,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:17,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:17,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156638651] [2022-11-25 17:53:17,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156638651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:17,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89869510] [2022-11-25 17:53:17,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:53:17,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:17,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:17,839 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:17,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:53:18,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:53:18,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:53:18,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-25 17:53:18,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:18,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:53:18,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:53:18,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:53:18,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:53:18,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:18,513 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 17 [2022-11-25 17:53:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:18,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:19,404 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:19,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2022-11-25 17:53:19,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:19,421 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 806 treesize of output 768 [2022-11-25 17:53:19,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:19,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 379 treesize of output 358 [2022-11-25 17:53:19,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:19,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 726 treesize of output 608 [2022-11-25 17:53:19,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:19,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 598 treesize of output 544 [2022-11-25 17:53:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:20,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89869510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:20,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:20,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-11-25 17:53:20,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194082634] [2022-11-25 17:53:20,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:20,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 17:53:20,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:20,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 17:53:20,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=780, Unknown=13, NotChecked=0, Total=930 [2022-11-25 17:53:23,163 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 294 [2022-11-25 17:53:23,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 1439 transitions, 32815 flow. Second operand has 31 states, 31 states have (on average 79.83870967741936) internal successors, (2475), 31 states have internal predecessors, (2475), 0 states have call successors, (0), 0 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 17:53:23,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:23,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 294 [2022-11-25 17:53:23,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:53:34,147 INFO L130 PetriNetUnfolder]: 11492/17172 cut-off events. [2022-11-25 17:53:34,147 INFO L131 PetriNetUnfolder]: For 328121/328121 co-relation queries the response was YES. [2022-11-25 17:53:34,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151347 conditions, 17172 events. 11492/17172 cut-off events. For 328121/328121 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 108521 event pairs, 954 based on Foata normal form. 1/17173 useless extension candidates. Maximal degree in co-relation 151004. Up to 10841 conditions per place. [2022-11-25 17:53:34,531 INFO L137 encePairwiseOnDemand]: 279/294 looper letters, 820 selfloop transitions, 848 changer transitions 6/1674 dead transitions. [2022-11-25 17:53:34,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 1674 transitions, 39363 flow [2022-11-25 17:53:34,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:53:34,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 17:53:34,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1503 transitions. [2022-11-25 17:53:34,536 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3007202881152461 [2022-11-25 17:53:34,537 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1503 transitions. [2022-11-25 17:53:34,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1503 transitions. [2022-11-25 17:53:34,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:53:34,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1503 transitions. [2022-11-25 17:53:34,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 88.41176470588235) internal successors, (1503), 17 states have internal predecessors, (1503), 0 states have call successors, (0), 0 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 17:53:34,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 294.0) internal successors, (5292), 18 states have internal predecessors, (5292), 0 states have call successors, (0), 0 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 17:53:34,549 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 294.0) internal successors, (5292), 18 states have internal predecessors, (5292), 0 states have call successors, (0), 0 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 17:53:34,549 INFO L175 Difference]: Start difference. First operand has 259 places, 1439 transitions, 32815 flow. Second operand 17 states and 1503 transitions. [2022-11-25 17:53:34,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 1674 transitions, 39363 flow [2022-11-25 17:53:40,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 1674 transitions, 38976 flow, removed 49 selfloop flow, removed 3 redundant places. [2022-11-25 17:53:40,905 INFO L231 Difference]: Finished difference. Result has 278 places, 1505 transitions, 36396 flow [2022-11-25 17:53:40,907 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=32434, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=783, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=36396, PETRI_PLACES=278, PETRI_TRANSITIONS=1505} [2022-11-25 17:53:40,907 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 246 predicate places. [2022-11-25 17:53:40,908 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 1505 transitions, 36396 flow [2022-11-25 17:53:40,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 79.83870967741936) internal successors, (2475), 31 states have internal predecessors, (2475), 0 states have call successors, (0), 0 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 17:53:40,909 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:53:40,909 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 17:53:40,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:53:41,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:53:41,116 INFO L420 AbstractCegarLoop]: === Iteration 17 === 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 17:53:41,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:53:41,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1108174027, now seen corresponding path program 5 times [2022-11-25 17:53:41,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:53:41,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68269748] [2022-11-25 17:53:41,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:53:41,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:53:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:53:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:53:41,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:53:41,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68269748] [2022-11-25 17:53:41,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68269748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:53:41,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894658523] [2022-11-25 17:53:41,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:53:41,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:53:41,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:53:41,809 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:53:41,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:53:41,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:53:41,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:53:41,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-25 17:53:41,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:53:42,245 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:42,246 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 17 [2022-11-25 17:53:42,369 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 17:53:42,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:53:42,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:53:42,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2022-11-25 17:53:42,705 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 17:53:42,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894658523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:53:42,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:53:42,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 24 [2022-11-25 17:53:42,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272851186] [2022-11-25 17:53:42,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:53:42,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:53:42,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:53:42,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:53:42,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-11-25 17:53:44,073 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2022-11-25 17:53:44,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 1505 transitions, 36396 flow. Second operand has 26 states, 26 states have (on average 108.42307692307692) internal successors, (2819), 26 states have internal predecessors, (2819), 0 states have call successors, (0), 0 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 17:53:44,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:53:44,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2022-11-25 17:53:44,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:54:12,448 INFO L130 PetriNetUnfolder]: 21375/32029 cut-off events. [2022-11-25 17:54:12,449 INFO L131 PetriNetUnfolder]: For 743491/743491 co-relation queries the response was YES. [2022-11-25 17:54:12,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300339 conditions, 32029 events. 21375/32029 cut-off events. For 743491/743491 co-relation queries the response was YES. Maximal size of possible extension queue 1852. Compared 224942 event pairs, 910 based on Foata normal form. 7/32036 useless extension candidates. Maximal degree in co-relation 299839. Up to 11123 conditions per place. [2022-11-25 17:54:13,207 INFO L137 encePairwiseOnDemand]: 276/294 looper letters, 1160 selfloop transitions, 2594 changer transitions 27/3781 dead transitions. [2022-11-25 17:54:13,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 3781 transitions, 85957 flow [2022-11-25 17:54:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-11-25 17:54:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2022-11-25 17:54:13,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 13204 transitions. [2022-11-25 17:54:13,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3939610932092135 [2022-11-25 17:54:13,248 INFO L72 ComplementDD]: Start complementDD. Operand 114 states and 13204 transitions. [2022-11-25 17:54:13,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 13204 transitions. [2022-11-25 17:54:13,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:54:13,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 114 states and 13204 transitions. [2022-11-25 17:54:13,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 115 states, 114 states have (on average 115.82456140350877) internal successors, (13204), 114 states have internal predecessors, (13204), 0 states have call successors, (0), 0 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 17:54:13,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 115 states, 115 states have (on average 294.0) internal successors, (33810), 115 states have internal predecessors, (33810), 0 states have call successors, (0), 0 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 17:54:13,327 INFO L81 ComplementDD]: Finished complementDD. Result has 115 states, 115 states have (on average 294.0) internal successors, (33810), 115 states have internal predecessors, (33810), 0 states have call successors, (0), 0 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 17:54:13,327 INFO L175 Difference]: Start difference. First operand has 278 places, 1505 transitions, 36396 flow. Second operand 114 states and 13204 transitions. [2022-11-25 17:54:13,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 3781 transitions, 85957 flow [2022-11-25 17:54:38,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 3781 transitions, 84904 flow, removed 150 selfloop flow, removed 5 redundant places. [2022-11-25 17:54:39,090 INFO L231 Difference]: Finished difference. Result has 435 places, 2995 transitions, 80616 flow [2022-11-25 17:54:39,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=35740, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=114, PETRI_FLOW=80616, PETRI_PLACES=435, PETRI_TRANSITIONS=2995} [2022-11-25 17:54:39,092 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 403 predicate places. [2022-11-25 17:54:39,092 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 2995 transitions, 80616 flow [2022-11-25 17:54:39,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 108.42307692307692) internal successors, (2819), 26 states have internal predecessors, (2819), 0 states have call successors, (0), 0 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 17:54:39,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:54:39,093 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 17:54:39,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:54:39,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:54:39,294 INFO L420 AbstractCegarLoop]: === Iteration 18 === 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 17:54:39,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:54:39,294 INFO L85 PathProgramCache]: Analyzing trace with hash 334932264, now seen corresponding path program 2 times [2022-11-25 17:54:39,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:54:39,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464726184] [2022-11-25 17:54:39,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:54:39,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:54:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:54:39,945 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 17:54:39,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:54:39,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464726184] [2022-11-25 17:54:39,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464726184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:54:39,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610182468] [2022-11-25 17:54:39,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:54:39,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:54:39,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:54:39,951 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:54:39,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:54:40,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:54:40,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:54:40,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-25 17:54:40,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:54:40,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:54:40,290 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 17:54:40,382 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 22 treesize of output 10 [2022-11-25 17:54:40,429 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 17:54:40,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:54:40,550 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_712 (Array Int Int))) (<= c_~res1~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_712) c_~A~0.base) c_~A~0.offset) c_~res2~0))) (forall ((v_ArrVal_712 (Array Int Int))) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_712) c_~A~0.base) c_~A~0.offset) c_~res2~0) c_~res1~0))) is different from false [2022-11-25 17:54:40,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:54:40,590 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 46 treesize of output 36 [2022-11-25 17:54:40,599 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 11 [2022-11-25 17:54:40,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:54:40,636 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 17:54:40,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-11-25 17:54:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-25 17:54:40,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610182468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:54:40,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:54:40,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-25 17:54:40,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374889463] [2022-11-25 17:54:40,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:54:40,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:54:40,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:54:40,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:54:40,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=310, Unknown=1, NotChecked=36, Total=420 [2022-11-25 17:54:40,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 294 [2022-11-25 17:54:40,797 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 2995 transitions, 80616 flow. Second operand has 21 states, 21 states have (on average 106.42857142857143) internal successors, (2235), 21 states have internal predecessors, (2235), 0 states have call successors, (0), 0 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 17:54:40,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:54:40,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 294 [2022-11-25 17:54:40,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:55:17,717 INFO L130 PetriNetUnfolder]: 22373/33565 cut-off events. [2022-11-25 17:55:17,717 INFO L131 PetriNetUnfolder]: For 1246536/1247609 co-relation queries the response was YES. [2022-11-25 17:55:18,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378689 conditions, 33565 events. 22373/33565 cut-off events. For 1246536/1247609 co-relation queries the response was YES. Maximal size of possible extension queue 2004. Compared 238863 event pairs, 3168 based on Foata normal form. 506/33830 useless extension candidates. Maximal degree in co-relation 378253. Up to 24071 conditions per place. [2022-11-25 17:55:18,923 INFO L137 encePairwiseOnDemand]: 285/294 looper letters, 2151 selfloop transitions, 1114 changer transitions 2/3331 dead transitions. [2022-11-25 17:55:18,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 3331 transitions, 94522 flow [2022-11-25 17:55:18,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:55:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:55:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1519 transitions. [2022-11-25 17:55:18,927 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2022-11-25 17:55:18,927 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1519 transitions. [2022-11-25 17:55:18,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1519 transitions. [2022-11-25 17:55:18,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:55:18,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1519 transitions. [2022-11-25 17:55:18,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 116.84615384615384) internal successors, (1519), 13 states have internal predecessors, (1519), 0 states have call successors, (0), 0 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 17:55:18,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 17:55:18,937 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 294.0) internal successors, (4116), 14 states have internal predecessors, (4116), 0 states have call successors, (0), 0 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 17:55:18,937 INFO L175 Difference]: Start difference. First operand has 435 places, 2995 transitions, 80616 flow. Second operand 13 states and 1519 transitions. [2022-11-25 17:55:18,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 3331 transitions, 94522 flow [2022-11-25 17:56:27,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 3331 transitions, 91577 flow, removed 1401 selfloop flow, removed 6 redundant places. [2022-11-25 17:56:27,820 INFO L231 Difference]: Finished difference. Result has 448 places, 3140 transitions, 85084 flow [2022-11-25 17:56:27,823 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=77899, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2995, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1003, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1946, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=85084, PETRI_PLACES=448, PETRI_TRANSITIONS=3140} [2022-11-25 17:56:27,824 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, 416 predicate places. [2022-11-25 17:56:27,824 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 3140 transitions, 85084 flow [2022-11-25 17:56:27,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 106.42857142857143) internal successors, (2235), 21 states have internal predecessors, (2235), 0 states have call successors, (0), 0 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 17:56:27,825 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:56:27,825 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 17:56:27,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:56:28,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:56:28,032 INFO L420 AbstractCegarLoop]: === Iteration 19 === 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 17:56:28,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:56:28,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1879992193, now seen corresponding path program 6 times [2022-11-25 17:56:28,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:56:28,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327502516] [2022-11-25 17:56:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:56:28,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:56:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:56:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:29,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:56:29,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327502516] [2022-11-25 17:56:29,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327502516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:56:29,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972244675] [2022-11-25 17:56:29,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:56:29,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:56:29,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:56:29,050 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:56:29,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c684e109-b36d-4936-88ec-d65e1ddb2ff9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:56:29,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 17:56:29,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:56:29,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-25 17:56:29,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:56:29,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:56:29,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:56:29,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:56:29,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:56:29,693 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 17:56:29,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:29,764 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 26 treesize of output 20 [2022-11-25 17:56:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:56:29,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:56:31,038 WARN L837 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_760 (Array Int Int)) (v_ArrVal_761 (Array Int Int))) (or (<= (+ 2 ~M~0) c_~N~0) (not (< ~M~0 c_~N~0)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_760))) (= (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_761) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4)))) (+ c_~res1~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)))))) is different from false [2022-11-25 17:56:31,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:31,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 47 [2022-11-25 17:56:31,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:31,175 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 13174 treesize of output 12160 [2022-11-25 17:56:31,295 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 12150 treesize of output 10614 [2022-11-25 17:56:31,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:31,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 10614 treesize of output 9344 [2022-11-25 17:56:31,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:56:31,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9334 treesize of output 8704