./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:19:51,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:19:51,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:19:51,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:19:51,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:19:51,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:19:51,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:19:51,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:19:51,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:19:51,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:19:51,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:19:51,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:19:51,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:19:51,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:19:51,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:19:51,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:19:51,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:19:51,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:19:51,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:19:51,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:19:51,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:19:51,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:19:51,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:19:51,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:19:51,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:19:51,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:19:51,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:19:51,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:19:51,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:19:51,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:19:51,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:19:51,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:19:51,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:19:51,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:19:51,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:19:51,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:19:51,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:19:51,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:19:51,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:19:51,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:19:51,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:19:51,408 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 18:19:51,430 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:19:51,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:19:51,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:19:51,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:19:51,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:19:51,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:19:51,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:19:51,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:19:51,433 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:19:51,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:19:51,433 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:19:51,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:19:51,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:19:51,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:19:51,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 18:19:51,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:19:51,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 18:19:51,434 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:19:51,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 18:19:51,435 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:19:51,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 18:19:51,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:19:51,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:19:51,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:19:51,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:19:51,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:19:51,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:19:51,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 18:19:51,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:19:51,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:19:51,437 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:19:51,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 18:19:51,437 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:19:51,437 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:19:51,437 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:19:51,438 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_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 [2022-12-13 18:19:51,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:19:51,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:19:51,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:19:51,670 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:19:51,670 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:19:51,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-12-13 18:19:54,213 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:19:54,340 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:19:54,340 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-12-13 18:19:54,345 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/data/081fe9756/f7d233f5cce743b6b2b490d2c2cdb109/FLAG020412953 [2022-12-13 18:19:54,359 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/data/081fe9756/f7d233f5cce743b6b2b490d2c2cdb109 [2022-12-13 18:19:54,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:19:54,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:19:54,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:19:54,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:19:54,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:19:54,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:19:54" (1/1) ... [2022-12-13 18:19:54,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c83319a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:19:54, skipping insertion in model container [2022-12-13 18:19:54,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:19:54" (1/1) ... [2022-12-13 18:19:54,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:19:54,387 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:19:54,496 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:19:54,498 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:19:54,500 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:19:54,501 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:19:54,502 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:19:54,503 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:19:54,509 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_b14969a1-149f-415e-b2f1-3350cac9643f/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-12-13 18:19:54,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:19:54,522 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:19:54,532 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:19:54,533 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:19:54,534 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:19:54,534 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:19:54,535 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 18:19:54,536 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 18:19:54,539 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_b14969a1-149f-415e-b2f1-3350cac9643f/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-12-13 18:19:54,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:19:54,552 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:19:54,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:19:54 WrapperNode [2022-12-13 18:19:54,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:19:54,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:19:54,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:19:54,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:19:54,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:19:54" (1/1) ... [2022-12-13 18:19:54,565 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:19:54" (1/1) ... [2022-12-13 18:19:54,580 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2022-12-13 18:19:54,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:19:54,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:19:54,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:19:54,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:19:54,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:19:54" (1/1) ... [2022-12-13 18:19:54,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:19:54" (1/1) ... [2022-12-13 18:19:54,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:19:54" (1/1) ... [2022-12-13 18:19:54,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:19:54" (1/1) ... [2022-12-13 18:19:54,596 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:19:54" (1/1) ... [2022-12-13 18:19:54,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:19:54" (1/1) ... [2022-12-13 18:19:54,600 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:19:54" (1/1) ... [2022-12-13 18:19:54,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:19:54" (1/1) ... [2022-12-13 18:19:54,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:19:54,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:19:54,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:19:54,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:19:54,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:19:54" (1/1) ... [2022-12-13 18:19:54,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:19:54,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:19:54,631 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:19:54,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:19:54,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:19:54,667 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 18:19:54,667 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 18:19:54,667 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 18:19:54,667 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 18:19:54,668 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 18:19:54,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 18:19:54,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 18:19:54,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:19:54,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 18:19:54,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 18:19:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 18:19:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 18:19:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:19:54,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:19:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 18:19:54,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:19:54,671 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 18:19:54,784 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:19:54,786 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:19:55,016 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:19:55,078 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:19:55,078 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 18:19:55,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:19:55 BoogieIcfgContainer [2022-12-13 18:19:55,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:19:55,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:19:55,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:19:55,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:19:55,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:19:54" (1/3) ... [2022-12-13 18:19:55,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4816a95a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:19:55, skipping insertion in model container [2022-12-13 18:19:55,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:19:54" (2/3) ... [2022-12-13 18:19:55,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4816a95a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:19:55, skipping insertion in model container [2022-12-13 18:19:55,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:19:55" (3/3) ... [2022-12-13 18:19:55,090 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2022-12-13 18:19:55,097 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 18:19:55,107 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:19:55,107 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 18:19:55,107 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:19:55,163 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 18:19:55,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 154 transitions, 332 flow [2022-12-13 18:19:55,257 INFO L130 PetriNetUnfolder]: 12/151 cut-off events. [2022-12-13 18:19:55,257 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 18:19:55,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 12/151 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 92 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2022-12-13 18:19:55,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 154 transitions, 332 flow [2022-12-13 18:19:55,268 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 140 transitions, 298 flow [2022-12-13 18:19:55,272 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:19:55,283 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 140 transitions, 298 flow [2022-12-13 18:19:55,285 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 140 transitions, 298 flow [2022-12-13 18:19:55,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 140 transitions, 298 flow [2022-12-13 18:19:55,321 INFO L130 PetriNetUnfolder]: 12/140 cut-off events. [2022-12-13 18:19:55,321 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 18:19:55,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 140 events. 12/140 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 113. Up to 2 conditions per place. [2022-12-13 18:19:55,324 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2022-12-13 18:19:59,944 INFO L134 LiptonReduction]: Checked pairs total: 1567 [2022-12-13 18:19:59,944 INFO L136 LiptonReduction]: Total number of compositions: 140 [2022-12-13 18:19:59,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:19:59,960 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;@269774df, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:19:59,960 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 18:19:59,965 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2022-12-13 18:19:59,965 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 18:19:59,965 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:19:59,965 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] [2022-12-13 18:19:59,966 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)] === [2022-12-13 18:19:59,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:19:59,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1234212212, now seen corresponding path program 1 times [2022-12-13 18:19:59,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:19:59,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594751326] [2022-12-13 18:19:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:19:59,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:20:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:00,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:20:00,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594751326] [2022-12-13 18:20:00,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594751326] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:20:00,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:20:00,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:20:00,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654497273] [2022-12-13 18:20:00,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:20:00,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:20:00,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:20:00,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:20:00,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:20:00,631 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 294 [2022-12-13 18:20:00,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:00,634 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:00,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 294 [2022-12-13 18:20:00,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:00,726 INFO L130 PetriNetUnfolder]: 249/356 cut-off events. [2022-12-13 18:20:00,726 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-12-13 18:20:00,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 356 events. 249/356 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1070 event pairs, 111 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 549. Up to 343 conditions per place. [2022-12-13 18:20:00,731 INFO L137 encePairwiseOnDemand]: 291/294 looper letters, 20 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2022-12-13 18:20:00,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 112 flow [2022-12-13 18:20:00,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:20:00,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 18:20:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2022-12-13 18:20:00,745 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2022-12-13 18:20:00,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2022-12-13 18:20:00,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2022-12-13 18:20:00,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:00,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2022-12-13 18:20:00,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:00,759 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) [2022-12-13 18:20:00,760 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) [2022-12-13 18:20:00,761 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 413 transitions. [2022-12-13 18:20:00,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 112 flow [2022-12-13 18:20:00,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 100 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 18:20:00,766 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2022-12-13 18:20:00,767 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2022-12-13 18:20:00,769 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2022-12-13 18:20:00,770 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2022-12-13 18:20:00,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:00,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:00,770 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] [2022-12-13 18:20:00,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:20:00,771 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)] === [2022-12-13 18:20:00,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:00,771 INFO L85 PathProgramCache]: Analyzing trace with hash 346842181, now seen corresponding path program 1 times [2022-12-13 18:20:00,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:20:00,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985020975] [2022-12-13 18:20:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:00,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:20:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:00,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:20:00,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985020975] [2022-12-13 18:20:00,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985020975] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:20:00,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536735440] [2022-12-13 18:20:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:00,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:00,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:20:00,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:20:00,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:20:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:00,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:20:00,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:00,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:01,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536735440] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 18:20:01,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:20:01,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2022-12-13 18:20:01,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919701814] [2022-12-13 18:20:01,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:20:01,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:20:01,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:20:01,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:20:01,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:20:01,103 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 294 [2022-12-13 18:20:01,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:01,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:01,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 294 [2022-12-13 18:20:01,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:01,212 INFO L130 PetriNetUnfolder]: 304/437 cut-off events. [2022-12-13 18:20:01,213 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:20:01,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 889 conditions, 437 events. 304/437 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1401 event pairs, 49 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 878. Up to 330 conditions per place. [2022-12-13 18:20:01,216 INFO L137 encePairwiseOnDemand]: 289/294 looper letters, 29 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2022-12-13 18:20:01,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 154 flow [2022-12-13 18:20:01,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:20:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 18:20:01,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 654 transitions. [2022-12-13 18:20:01,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4448979591836735 [2022-12-13 18:20:01,219 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 654 transitions. [2022-12-13 18:20:01,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 654 transitions. [2022-12-13 18:20:01,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:01,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 654 transitions. [2022-12-13 18:20:01,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:01,226 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) [2022-12-13 18:20:01,227 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) [2022-12-13 18:20:01,227 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 654 transitions. [2022-12-13 18:20:01,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 154 flow [2022-12-13 18:20:01,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 150 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 18:20:01,228 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 78 flow [2022-12-13 18:20:01,228 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=78, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2022-12-13 18:20:01,229 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2022-12-13 18:20:01,229 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 78 flow [2022-12-13 18:20:01,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:01,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:01,230 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] [2022-12-13 18:20:01,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:20:01,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-13 18:20:01,431 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)] === [2022-12-13 18:20:01,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:01,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1498297092, now seen corresponding path program 1 times [2022-12-13 18:20:01,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:20:01,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730856655] [2022-12-13 18:20:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:01,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:20:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:20:01,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:20:01,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730856655] [2022-12-13 18:20:01,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730856655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:20:01,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958457961] [2022-12-13 18:20:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:01,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:01,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:20:01,552 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:20:01,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:20:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:01,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:20:01,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:20:01,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:20:01,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958457961] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 18:20:01,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:20:01,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-12-13 18:20:01,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620618334] [2022-12-13 18:20:01,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:20:01,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:20:01,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:20:01,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:20:01,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-12-13 18:20:01,814 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 294 [2022-12-13 18:20:01,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:01,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:01,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 294 [2022-12-13 18:20:01,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:01,961 INFO L130 PetriNetUnfolder]: 280/414 cut-off events. [2022-12-13 18:20:01,961 INFO L131 PetriNetUnfolder]: For 75/106 co-relation queries the response was YES. [2022-12-13 18:20:01,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 979 conditions, 414 events. 280/414 cut-off events. For 75/106 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1267 event pairs, 28 based on Foata normal form. 31/348 useless extension candidates. Maximal degree in co-relation 961. Up to 242 conditions per place. [2022-12-13 18:20:01,964 INFO L137 encePairwiseOnDemand]: 287/294 looper letters, 46 selfloop transitions, 9 changer transitions 0/56 dead transitions. [2022-12-13 18:20:01,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 56 transitions, 274 flow [2022-12-13 18:20:01,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:20:01,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 18:20:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 997 transitions. [2022-12-13 18:20:01,966 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42389455782312924 [2022-12-13 18:20:01,966 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 997 transitions. [2022-12-13 18:20:01,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 997 transitions. [2022-12-13 18:20:01,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:01,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 997 transitions. [2022-12-13 18:20:01,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 124.625) internal successors, (997), 8 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:01,972 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) [2022-12-13 18:20:01,973 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) [2022-12-13 18:20:01,973 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 78 flow. Second operand 8 states and 997 transitions. [2022-12-13 18:20:01,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 56 transitions, 274 flow [2022-12-13 18:20:01,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 56 transitions, 257 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 18:20:01,975 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 110 flow [2022-12-13 18:20:01,975 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=110, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2022-12-13 18:20:01,976 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2022-12-13 18:20:01,976 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 110 flow [2022-12-13 18:20:01,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 121.0) internal successors, (847), 7 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:01,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:01,977 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] [2022-12-13 18:20:01,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 18:20:02,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:02,178 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)] === [2022-12-13 18:20:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:02,178 INFO L85 PathProgramCache]: Analyzing trace with hash 946450637, now seen corresponding path program 1 times [2022-12-13 18:20:02,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:20:02,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811745634] [2022-12-13 18:20:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:02,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:20:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:03,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:20:03,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811745634] [2022-12-13 18:20:03,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811745634] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:20:03,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211394749] [2022-12-13 18:20:03,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:03,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:03,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:20:03,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:20:03,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 18:20:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:03,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 18:20:03,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:03,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:20:03,638 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 35 treesize of output 33 [2022-12-13 18:20:03,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:20:03,753 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 35 treesize of output 33 [2022-12-13 18:20:03,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:20:03,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:20:03,884 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 66 treesize of output 39 [2022-12-13 18:20:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:04,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:04,338 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (= c_~min2~0 c_~min1~0)) (.cse1 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_154 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_154) c_~A~0.base) .cse1))) (or (<= c_~min2~0 .cse0) (= c_~min1~0 .cse0) (not (< .cse0 c_~min3~0))))) (or .cse2 (forall ((v_ArrVal_154 (Array Int Int))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_154) c_~A~0.base) .cse1))) (or (< .cse3 c_~min2~0) (not (< .cse3 c_~min3~0)))))) (or (and (or (<= c_~min2~0 c_~min3~0) (= c_~min1~0 c_~min3~0)) (or .cse2 (< c_~min3~0 c_~min2~0))) (forall ((v_ArrVal_154 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_154) c_~A~0.base) .cse1) c_~min3~0))))) is different from false [2022-12-13 18:20:08,661 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:20:08,661 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 481 treesize of output 421 [2022-12-13 18:20:08,669 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 386 treesize of output 368 [2022-12-13 18:20:08,677 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 368 treesize of output 344 [2022-12-13 18:20:08,684 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 344 treesize of output 338 [2022-12-13 18:20:08,691 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 338 treesize of output 326 [2022-12-13 18:20:08,709 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 326 treesize of output 314 [2022-12-13 18:20:08,719 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 314 treesize of output 278 [2022-12-13 18:20:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 18:20:09,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211394749] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:20:09,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:20:09,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2022-12-13 18:20:09,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011006995] [2022-12-13 18:20:09,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:20:09,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 18:20:09,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:20:09,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 18:20:09,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=697, Unknown=6, NotChecked=54, Total=870 [2022-12-13 18:20:09,597 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 294 [2022-12-13 18:20:09,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 110 flow. Second operand has 30 states, 30 states have (on average 86.2) internal successors, (2586), 30 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:09,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:09,599 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 294 [2022-12-13 18:20:09,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:16,904 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 72 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:20:17,289 INFO L130 PetriNetUnfolder]: 689/1014 cut-off events. [2022-12-13 18:20:17,290 INFO L131 PetriNetUnfolder]: For 397/397 co-relation queries the response was YES. [2022-12-13 18:20:17,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2746 conditions, 1014 events. 689/1014 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3795 event pairs, 39 based on Foata normal form. 1/780 useless extension candidates. Maximal degree in co-relation 2059. Up to 629 conditions per place. [2022-12-13 18:20:17,295 INFO L137 encePairwiseOnDemand]: 285/294 looper letters, 77 selfloop transitions, 30 changer transitions 1/110 dead transitions. [2022-12-13 18:20:17,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 110 transitions, 586 flow [2022-12-13 18:20:17,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 18:20:17,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 18:20:17,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1020 transitions. [2022-12-13 18:20:17,299 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31539888682745826 [2022-12-13 18:20:17,299 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1020 transitions. [2022-12-13 18:20:17,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1020 transitions. [2022-12-13 18:20:17,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:17,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1020 transitions. [2022-12-13 18:20:17,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 92.72727272727273) internal successors, (1020), 11 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:17,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 294.0) internal successors, (3528), 12 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:17,308 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 294.0) internal successors, (3528), 12 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:17,309 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 110 flow. Second operand 11 states and 1020 transitions. [2022-12-13 18:20:17,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 110 transitions, 586 flow [2022-12-13 18:20:17,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 110 transitions, 559 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-12-13 18:20:17,314 INFO L231 Difference]: Finished difference. Result has 49 places, 57 transitions, 293 flow [2022-12-13 18:20:17,314 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=293, PETRI_PLACES=49, PETRI_TRANSITIONS=57} [2022-12-13 18:20:17,315 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2022-12-13 18:20:17,315 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 57 transitions, 293 flow [2022-12-13 18:20:17,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 86.2) internal successors, (2586), 30 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:17,316 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:17,316 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] [2022-12-13 18:20:17,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 18:20:17,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:17,517 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)] === [2022-12-13 18:20:17,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:17,518 INFO L85 PathProgramCache]: Analyzing trace with hash 79437351, now seen corresponding path program 2 times [2022-12-13 18:20:17,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:20:17,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329551798] [2022-12-13 18:20:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:17,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:20:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:18,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:20:18,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329551798] [2022-12-13 18:20:18,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329551798] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:20:18,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039658419] [2022-12-13 18:20:18,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:20:18,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:18,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:20:18,223 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:20:18,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 18:20:18,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:20:18,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:20:18,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 18:20:18,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:18,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:20:18,662 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:20:18,663 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 66 treesize of output 39 [2022-12-13 18:20:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:18,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:18,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:20:18,928 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 127 treesize of output 75 [2022-12-13 18:20:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:19,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039658419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:20:19,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:20:19,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2022-12-13 18:20:19,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909712816] [2022-12-13 18:20:19,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:20:19,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 18:20:19,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:20:19,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 18:20:19,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-12-13 18:20:20,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 294 [2022-12-13 18:20:20,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 57 transitions, 293 flow. Second operand has 24 states, 24 states have (on average 110.75) internal successors, (2658), 24 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:20,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:20,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 294 [2022-12-13 18:20:20,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:21,628 INFO L130 PetriNetUnfolder]: 1007/1500 cut-off events. [2022-12-13 18:20:21,628 INFO L131 PetriNetUnfolder]: For 1519/1524 co-relation queries the response was YES. [2022-12-13 18:20:21,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4869 conditions, 1500 events. 1007/1500 cut-off events. For 1519/1524 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6336 event pairs, 106 based on Foata normal form. 6/1504 useless extension candidates. Maximal degree in co-relation 3877. Up to 979 conditions per place. [2022-12-13 18:20:21,642 INFO L137 encePairwiseOnDemand]: 281/294 looper letters, 107 selfloop transitions, 58 changer transitions 4/171 dead transitions. [2022-12-13 18:20:21,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 171 transitions, 1064 flow [2022-12-13 18:20:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 18:20:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 18:20:21,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1867 transitions. [2022-12-13 18:20:21,650 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3968962585034014 [2022-12-13 18:20:21,650 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1867 transitions. [2022-12-13 18:20:21,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1867 transitions. [2022-12-13 18:20:21,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:21,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1867 transitions. [2022-12-13 18:20:21,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 116.6875) internal successors, (1867), 16 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:21,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 294.0) internal successors, (4998), 17 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:21,669 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 294.0) internal successors, (4998), 17 states have internal predecessors, (4998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:21,669 INFO L175 Difference]: Start difference. First operand has 49 places, 57 transitions, 293 flow. Second operand 16 states and 1867 transitions. [2022-12-13 18:20:21,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 171 transitions, 1064 flow [2022-12-13 18:20:21,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 171 transitions, 1053 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-12-13 18:20:21,681 INFO L231 Difference]: Finished difference. Result has 69 places, 101 transitions, 705 flow [2022-12-13 18:20:21,681 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=705, PETRI_PLACES=69, PETRI_TRANSITIONS=101} [2022-12-13 18:20:21,682 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2022-12-13 18:20:21,682 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 101 transitions, 705 flow [2022-12-13 18:20:21,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 110.75) internal successors, (2658), 24 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:21,684 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:21,684 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] [2022-12-13 18:20:21,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 18:20:21,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:21,885 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)] === [2022-12-13 18:20:21,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:21,885 INFO L85 PathProgramCache]: Analyzing trace with hash -290794929, now seen corresponding path program 3 times [2022-12-13 18:20:21,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:20:21,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834842321] [2022-12-13 18:20:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:21,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:20:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:22,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:20:22,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834842321] [2022-12-13 18:20:22,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834842321] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:20:22,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686460538] [2022-12-13 18:20:22,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:20:22,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:22,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:20:22,438 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:20:22,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 18:20:22,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 18:20:22,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:20:22,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 18:20:22,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:22,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:20:22,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:20:22,805 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 66 treesize of output 39 [2022-12-13 18:20:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:20:22,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:23,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:20:23,046 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 127 treesize of output 75 [2022-12-13 18:20:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:20:23,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686460538] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:20:23,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:20:23,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 24 [2022-12-13 18:20:23,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988609676] [2022-12-13 18:20:23,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:20:23,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 18:20:23,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:20:23,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 18:20:23,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-12-13 18:20:24,225 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 294 [2022-12-13 18:20:24,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 101 transitions, 705 flow. Second operand has 26 states, 26 states have (on average 107.46153846153847) internal successors, (2794), 26 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:24,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:24,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 294 [2022-12-13 18:20:24,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:25,010 INFO L130 PetriNetUnfolder]: 1334/1967 cut-off events. [2022-12-13 18:20:25,010 INFO L131 PetriNetUnfolder]: For 3899/3899 co-relation queries the response was YES. [2022-12-13 18:20:25,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7754 conditions, 1967 events. 1334/1967 cut-off events. For 3899/3899 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7964 event pairs, 282 based on Foata normal form. 1/1968 useless extension candidates. Maximal degree in co-relation 7287. Up to 1636 conditions per place. [2022-12-13 18:20:25,018 INFO L137 encePairwiseOnDemand]: 283/294 looper letters, 123 selfloop transitions, 67 changer transitions 1/191 dead transitions. [2022-12-13 18:20:25,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 191 transitions, 1622 flow [2022-12-13 18:20:25,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:20:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 18:20:25,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1348 transitions. [2022-12-13 18:20:25,024 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3820861678004535 [2022-12-13 18:20:25,024 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1348 transitions. [2022-12-13 18:20:25,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1348 transitions. [2022-12-13 18:20:25,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:25,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1348 transitions. [2022-12-13 18:20:25,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 112.33333333333333) internal successors, (1348), 12 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:25,028 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) [2022-12-13 18:20:25,029 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) [2022-12-13 18:20:25,029 INFO L175 Difference]: Start difference. First operand has 69 places, 101 transitions, 705 flow. Second operand 12 states and 1348 transitions. [2022-12-13 18:20:25,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 191 transitions, 1622 flow [2022-12-13 18:20:25,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 191 transitions, 1569 flow, removed 24 selfloop flow, removed 2 redundant places. [2022-12-13 18:20:25,039 INFO L231 Difference]: Finished difference. Result has 85 places, 143 transitions, 1212 flow [2022-12-13 18:20:25,039 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1212, PETRI_PLACES=85, PETRI_TRANSITIONS=143} [2022-12-13 18:20:25,039 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2022-12-13 18:20:25,039 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 143 transitions, 1212 flow [2022-12-13 18:20:25,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 107.46153846153847) internal successors, (2794), 26 states have internal predecessors, (2794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:25,040 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:25,040 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] [2022-12-13 18:20:25,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 18:20:25,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:25,241 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)] === [2022-12-13 18:20:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:25,241 INFO L85 PathProgramCache]: Analyzing trace with hash 353573911, now seen corresponding path program 4 times [2022-12-13 18:20:25,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:20:25,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006336349] [2022-12-13 18:20:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:25,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:20:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:25,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:20:25,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006336349] [2022-12-13 18:20:25,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006336349] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:20:25,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470136297] [2022-12-13 18:20:25,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:20:25,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:25,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:20:25,861 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:20:25,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 18:20:25,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:20:25,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:20:25,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 18:20:25,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:26,315 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-12-13 18:20:26,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 69 [2022-12-13 18:20:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:20:26,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:26,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:20:26,734 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 119 treesize of output 75 [2022-12-13 18:20:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:20:27,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470136297] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:20:27,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:20:27,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 25 [2022-12-13 18:20:27,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998862598] [2022-12-13 18:20:27,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:20:27,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 18:20:27,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:20:27,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 18:20:27,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-12-13 18:20:28,063 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 294 [2022-12-13 18:20:28,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 143 transitions, 1212 flow. Second operand has 27 states, 27 states have (on average 107.29629629629629) internal successors, (2897), 27 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:28,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:28,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 294 [2022-12-13 18:20:28,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:30,980 INFO L130 PetriNetUnfolder]: 2603/4014 cut-off events. [2022-12-13 18:20:30,980 INFO L131 PetriNetUnfolder]: For 10968/10968 co-relation queries the response was YES. [2022-12-13 18:20:30,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16830 conditions, 4014 events. 2603/4014 cut-off events. For 10968/10968 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20805 event pairs, 150 based on Foata normal form. 4/4018 useless extension candidates. Maximal degree in co-relation 16183. Up to 1834 conditions per place. [2022-12-13 18:20:31,008 INFO L137 encePairwiseOnDemand]: 279/294 looper letters, 232 selfloop transitions, 250 changer transitions 16/498 dead transitions. [2022-12-13 18:20:31,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 498 transitions, 4436 flow [2022-12-13 18:20:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 18:20:31,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 18:20:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3303 transitions. [2022-12-13 18:20:31,013 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38740323715693176 [2022-12-13 18:20:31,013 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3303 transitions. [2022-12-13 18:20:31,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3303 transitions. [2022-12-13 18:20:31,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:31,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3303 transitions. [2022-12-13 18:20:31,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 113.89655172413794) internal successors, (3303), 29 states have internal predecessors, (3303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:31,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 294.0) internal successors, (8820), 30 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:31,035 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 294.0) internal successors, (8820), 30 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:31,035 INFO L175 Difference]: Start difference. First operand has 85 places, 143 transitions, 1212 flow. Second operand 29 states and 3303 transitions. [2022-12-13 18:20:31,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 498 transitions, 4436 flow [2022-12-13 18:20:31,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 498 transitions, 4359 flow, removed 36 selfloop flow, removed 2 redundant places. [2022-12-13 18:20:31,060 INFO L231 Difference]: Finished difference. Result has 130 places, 331 transitions, 3620 flow [2022-12-13 18:20:31,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3620, PETRI_PLACES=130, PETRI_TRANSITIONS=331} [2022-12-13 18:20:31,061 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2022-12-13 18:20:31,061 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 331 transitions, 3620 flow [2022-12-13 18:20:31,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 107.29629629629629) internal successors, (2897), 27 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:31,063 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:31,063 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] [2022-12-13 18:20:31,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 18:20:31,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:31,265 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)] === [2022-12-13 18:20:31,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:31,267 INFO L85 PathProgramCache]: Analyzing trace with hash -338003937, now seen corresponding path program 5 times [2022-12-13 18:20:31,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:20:31,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097676868] [2022-12-13 18:20:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:31,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:20:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:31,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:31,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:20:31,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097676868] [2022-12-13 18:20:31,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097676868] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:20:31,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931132637] [2022-12-13 18:20:31,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:20:31,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:31,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:20:31,871 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:20:31,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 18:20:31,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:20:31,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:20:31,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 18:20:31,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:32,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:20:32,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 46 [2022-12-13 18:20:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:32,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:32,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:20:32,885 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 127 treesize of output 75 [2022-12-13 18:20:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:33,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931132637] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:20:33,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:20:33,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 25 [2022-12-13 18:20:33,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123167852] [2022-12-13 18:20:33,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:20:33,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 18:20:33,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:20:33,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 18:20:33,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-12-13 18:20:34,316 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 294 [2022-12-13 18:20:34,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 331 transitions, 3620 flow. Second operand has 27 states, 27 states have (on average 108.55555555555556) internal successors, (2931), 27 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:34,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:34,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 294 [2022-12-13 18:20:34,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:36,689 INFO L130 PetriNetUnfolder]: 3362/5258 cut-off events. [2022-12-13 18:20:36,689 INFO L131 PetriNetUnfolder]: For 31777/31777 co-relation queries the response was YES. [2022-12-13 18:20:36,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28693 conditions, 5258 events. 3362/5258 cut-off events. For 31777/31777 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 29232 event pairs, 429 based on Foata normal form. 5/5263 useless extension candidates. Maximal degree in co-relation 28566. Up to 3093 conditions per place. [2022-12-13 18:20:36,726 INFO L137 encePairwiseOnDemand]: 280/294 looper letters, 289 selfloop transitions, 279 changer transitions 11/579 dead transitions. [2022-12-13 18:20:36,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 579 transitions, 6779 flow [2022-12-13 18:20:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 18:20:36,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 18:20:36,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2856 transitions. [2022-12-13 18:20:36,732 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38857142857142857 [2022-12-13 18:20:36,733 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2856 transitions. [2022-12-13 18:20:36,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2856 transitions. [2022-12-13 18:20:36,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:36,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2856 transitions. [2022-12-13 18:20:36,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 114.24) internal successors, (2856), 25 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:36,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 294.0) internal successors, (7644), 26 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:36,743 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 294.0) internal successors, (7644), 26 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:36,743 INFO L175 Difference]: Start difference. First operand has 130 places, 331 transitions, 3620 flow. Second operand 25 states and 2856 transitions. [2022-12-13 18:20:36,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 579 transitions, 6779 flow [2022-12-13 18:20:36,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 579 transitions, 6463 flow, removed 157 selfloop flow, removed 2 redundant places. [2022-12-13 18:20:36,863 INFO L231 Difference]: Finished difference. Result has 162 places, 449 transitions, 5571 flow [2022-12-13 18:20:36,864 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5571, PETRI_PLACES=162, PETRI_TRANSITIONS=449} [2022-12-13 18:20:36,864 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 132 predicate places. [2022-12-13 18:20:36,864 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 449 transitions, 5571 flow [2022-12-13 18:20:36,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 108.55555555555556) internal successors, (2931), 27 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:36,865 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:36,865 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:20:36,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 18:20:37,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:37,067 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)] === [2022-12-13 18:20:37,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:37,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1311306357, now seen corresponding path program 6 times [2022-12-13 18:20:37,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:20:37,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033105866] [2022-12-13 18:20:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:37,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:20:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:38,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:20:38,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033105866] [2022-12-13 18:20:38,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033105866] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:20:38,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138312436] [2022-12-13 18:20:38,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:20:38,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:38,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:20:38,040 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:20:38,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 18:20:38,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 18:20:38,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:20:38,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 18:20:38,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:38,436 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-12-13 18:20:38,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 65 [2022-12-13 18:20:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:38,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:38,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:20:38,730 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 119 treesize of output 75 [2022-12-13 18:20:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:39,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138312436] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:20:39,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:20:39,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 26 [2022-12-13 18:20:39,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295954004] [2022-12-13 18:20:39,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:20:39,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 18:20:39,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:20:39,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 18:20:39,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-12-13 18:20:40,789 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 294 [2022-12-13 18:20:40,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 449 transitions, 5571 flow. Second operand has 28 states, 28 states have (on average 100.46428571428571) internal successors, (2813), 28 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:40,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:40,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 294 [2022-12-13 18:20:40,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:43,718 INFO L130 PetriNetUnfolder]: 3686/5767 cut-off events. [2022-12-13 18:20:43,718 INFO L131 PetriNetUnfolder]: For 44492/44492 co-relation queries the response was YES. [2022-12-13 18:20:43,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33841 conditions, 5767 events. 3686/5767 cut-off events. For 44492/44492 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 32275 event pairs, 795 based on Foata normal form. 15/5782 useless extension candidates. Maximal degree in co-relation 33525. Up to 4770 conditions per place. [2022-12-13 18:20:43,757 INFO L137 encePairwiseOnDemand]: 281/294 looper letters, 382 selfloop transitions, 233 changer transitions 15/630 dead transitions. [2022-12-13 18:20:43,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 630 transitions, 8265 flow [2022-12-13 18:20:43,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 18:20:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 18:20:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2955 transitions. [2022-12-13 18:20:43,762 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3589650145772595 [2022-12-13 18:20:43,762 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2955 transitions. [2022-12-13 18:20:43,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2955 transitions. [2022-12-13 18:20:43,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:43,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2955 transitions. [2022-12-13 18:20:43,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 105.53571428571429) internal successors, (2955), 28 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:43,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 294.0) internal successors, (8526), 29 states have internal predecessors, (8526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:43,776 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 294.0) internal successors, (8526), 29 states have internal predecessors, (8526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:43,777 INFO L175 Difference]: Start difference. First operand has 162 places, 449 transitions, 5571 flow. Second operand 28 states and 2955 transitions. [2022-12-13 18:20:43,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 630 transitions, 8265 flow [2022-12-13 18:20:43,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 630 transitions, 7928 flow, removed 103 selfloop flow, removed 7 redundant places. [2022-12-13 18:20:43,955 INFO L231 Difference]: Finished difference. Result has 192 places, 510 transitions, 6658 flow [2022-12-13 18:20:43,955 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=5171, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6658, PETRI_PLACES=192, PETRI_TRANSITIONS=510} [2022-12-13 18:20:43,956 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 162 predicate places. [2022-12-13 18:20:43,956 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 510 transitions, 6658 flow [2022-12-13 18:20:43,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 100.46428571428571) internal successors, (2813), 28 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:43,956 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:43,956 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] [2022-12-13 18:20:43,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 18:20:44,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 18:20:44,158 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)] === [2022-12-13 18:20:44,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:44,159 INFO L85 PathProgramCache]: Analyzing trace with hash 724428835, now seen corresponding path program 7 times [2022-12-13 18:20:44,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:20:44,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005832581] [2022-12-13 18:20:44,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:44,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:20:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:44,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:20:44,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005832581] [2022-12-13 18:20:44,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005832581] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:20:44,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48818136] [2022-12-13 18:20:44,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:20:44,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:44,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:20:44,764 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:20:44,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 18:20:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:44,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 18:20:44,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:45,159 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-12-13 18:20:45,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 65 [2022-12-13 18:20:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:45,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:45,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:20:45,515 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 103 treesize of output 73 [2022-12-13 18:20:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:45,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48818136] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:20:45,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:20:45,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2022-12-13 18:20:45,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369545844] [2022-12-13 18:20:45,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:20:45,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 18:20:45,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:20:45,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 18:20:45,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-12-13 18:20:46,881 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 294 [2022-12-13 18:20:46,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 510 transitions, 6658 flow. Second operand has 23 states, 23 states have (on average 111.6086956521739) internal successors, (2567), 23 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:46,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:46,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 294 [2022-12-13 18:20:46,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:48,663 INFO L130 PetriNetUnfolder]: 3566/5672 cut-off events. [2022-12-13 18:20:48,664 INFO L131 PetriNetUnfolder]: For 47149/47254 co-relation queries the response was YES. [2022-12-13 18:20:48,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34450 conditions, 5672 events. 3566/5672 cut-off events. For 47149/47254 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 33266 event pairs, 769 based on Foata normal form. 95/5732 useless extension candidates. Maximal degree in co-relation 34197. Up to 5105 conditions per place. [2022-12-13 18:20:48,699 INFO L137 encePairwiseOnDemand]: 284/294 looper letters, 416 selfloop transitions, 130 changer transitions 1/561 dead transitions. [2022-12-13 18:20:48,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 561 transitions, 8240 flow [2022-12-13 18:20:48,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 18:20:48,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 18:20:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1283 transitions. [2022-12-13 18:20:48,701 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39672232529375384 [2022-12-13 18:20:48,701 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1283 transitions. [2022-12-13 18:20:48,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1283 transitions. [2022-12-13 18:20:48,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:48,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1283 transitions. [2022-12-13 18:20:48,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 116.63636363636364) internal successors, (1283), 11 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:48,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 294.0) internal successors, (3528), 12 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:48,704 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 294.0) internal successors, (3528), 12 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:48,704 INFO L175 Difference]: Start difference. First operand has 192 places, 510 transitions, 6658 flow. Second operand 11 states and 1283 transitions. [2022-12-13 18:20:48,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 561 transitions, 8240 flow [2022-12-13 18:20:48,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 561 transitions, 7861 flow, removed 76 selfloop flow, removed 10 redundant places. [2022-12-13 18:20:48,894 INFO L231 Difference]: Finished difference. Result has 194 places, 528 transitions, 6831 flow [2022-12-13 18:20:48,894 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=6285, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6831, PETRI_PLACES=194, PETRI_TRANSITIONS=528} [2022-12-13 18:20:48,895 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 164 predicate places. [2022-12-13 18:20:48,895 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 528 transitions, 6831 flow [2022-12-13 18:20:48,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 111.6086956521739) internal successors, (2567), 23 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:48,895 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:48,895 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] [2022-12-13 18:20:48,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 18:20:49,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 18:20:49,097 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)] === [2022-12-13 18:20:49,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:49,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1245647641, now seen corresponding path program 8 times [2022-12-13 18:20:49,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:20:49,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369267168] [2022-12-13 18:20:49,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:49,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:20:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:49,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:20:49,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369267168] [2022-12-13 18:20:49,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369267168] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:20:49,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756059325] [2022-12-13 18:20:49,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:20:49,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:49,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:20:49,693 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:20:49,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 18:20:49,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:20:49,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:20:49,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 18:20:49,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:50,134 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-12-13 18:20:50,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 62 [2022-12-13 18:20:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:50,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:50,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:20:50,480 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 119 treesize of output 75 [2022-12-13 18:20:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:20:50,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756059325] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:20:50,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:20:50,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2022-12-13 18:20:50,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383653712] [2022-12-13 18:20:50,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:20:50,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 18:20:50,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:20:50,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 18:20:50,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-12-13 18:20:51,825 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 294 [2022-12-13 18:20:51,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 528 transitions, 6831 flow. Second operand has 24 states, 24 states have (on average 110.75) internal successors, (2658), 24 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:51,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:51,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 294 [2022-12-13 18:20:51,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:53,639 INFO L130 PetriNetUnfolder]: 3596/5706 cut-off events. [2022-12-13 18:20:53,639 INFO L131 PetriNetUnfolder]: For 47267/47413 co-relation queries the response was YES. [2022-12-13 18:20:53,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34772 conditions, 5706 events. 3596/5706 cut-off events. For 47267/47413 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 33359 event pairs, 839 based on Foata normal form. 104/5773 useless extension candidates. Maximal degree in co-relation 34595. Up to 5090 conditions per place. [2022-12-13 18:20:53,683 INFO L137 encePairwiseOnDemand]: 285/294 looper letters, 406 selfloop transitions, 143 changer transitions 2/565 dead transitions. [2022-12-13 18:20:53,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 565 transitions, 8224 flow [2022-12-13 18:20:53,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 18:20:53,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 18:20:53,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1160 transitions. [2022-12-13 18:20:53,686 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2022-12-13 18:20:53,686 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1160 transitions. [2022-12-13 18:20:53,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1160 transitions. [2022-12-13 18:20:53,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:53,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1160 transitions. [2022-12-13 18:20:53,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:53,689 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) [2022-12-13 18:20:53,689 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) [2022-12-13 18:20:53,689 INFO L175 Difference]: Start difference. First operand has 194 places, 528 transitions, 6831 flow. Second operand 10 states and 1160 transitions. [2022-12-13 18:20:53,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 565 transitions, 8224 flow [2022-12-13 18:20:53,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 565 transitions, 7914 flow, removed 31 selfloop flow, removed 8 redundant places. [2022-12-13 18:20:53,870 INFO L231 Difference]: Finished difference. Result has 196 places, 530 transitions, 6872 flow [2022-12-13 18:20:53,870 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=6518, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6872, PETRI_PLACES=196, PETRI_TRANSITIONS=530} [2022-12-13 18:20:53,871 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 166 predicate places. [2022-12-13 18:20:53,871 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 530 transitions, 6872 flow [2022-12-13 18:20:53,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 110.75) internal successors, (2658), 24 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:53,871 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:53,871 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:20:53,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 18:20:54,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 18:20:54,072 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)] === [2022-12-13 18:20:54,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:54,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1152162672, now seen corresponding path program 9 times [2022-12-13 18:20:54,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:20:54,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465009768] [2022-12-13 18:20:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:54,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:20:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:20:54,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:20:54,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465009768] [2022-12-13 18:20:54,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465009768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:20:54,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406196739] [2022-12-13 18:20:54,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:20:54,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:54,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:20:54,169 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:20:54,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 18:20:54,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 18:20:54,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:20:54,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:20:54,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:20:54,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:20:54,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406196739] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:20:54,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:20:54,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-13 18:20:54,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137712898] [2022-12-13 18:20:54,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:20:54,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 18:20:54,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:20:54,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 18:20:54,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-13 18:20:54,476 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 294 [2022-12-13 18:20:54,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 530 transitions, 6872 flow. Second operand has 14 states, 14 states have (on average 126.35714285714286) internal successors, (1769), 14 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:54,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:54,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 294 [2022-12-13 18:20:54,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:55,824 INFO L130 PetriNetUnfolder]: 3316/5492 cut-off events. [2022-12-13 18:20:55,824 INFO L131 PetriNetUnfolder]: For 50272/50710 co-relation queries the response was YES. [2022-12-13 18:20:55,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32956 conditions, 5492 events. 3316/5492 cut-off events. For 50272/50710 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34523 event pairs, 763 based on Foata normal form. 545/5885 useless extension candidates. Maximal degree in co-relation 32832. Up to 3070 conditions per place. [2022-12-13 18:20:55,855 INFO L137 encePairwiseOnDemand]: 288/294 looper letters, 460 selfloop transitions, 71 changer transitions 10/576 dead transitions. [2022-12-13 18:20:55,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 576 transitions, 8186 flow [2022-12-13 18:20:55,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:20:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 18:20:55,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1064 transitions. [2022-12-13 18:20:55,856 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2022-12-13 18:20:55,857 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1064 transitions. [2022-12-13 18:20:55,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1064 transitions. [2022-12-13 18:20:55,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:55,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1064 transitions. [2022-12-13 18:20:55,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 133.0) internal successors, (1064), 8 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:55,860 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) [2022-12-13 18:20:55,860 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) [2022-12-13 18:20:55,860 INFO L175 Difference]: Start difference. First operand has 196 places, 530 transitions, 6872 flow. Second operand 8 states and 1064 transitions. [2022-12-13 18:20:55,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 576 transitions, 8186 flow [2022-12-13 18:20:56,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 576 transitions, 7876 flow, removed 51 selfloop flow, removed 10 redundant places. [2022-12-13 18:20:56,036 INFO L231 Difference]: Finished difference. Result has 197 places, 477 transitions, 6139 flow [2022-12-13 18:20:56,036 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=5768, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6139, PETRI_PLACES=197, PETRI_TRANSITIONS=477} [2022-12-13 18:20:56,036 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2022-12-13 18:20:56,036 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 477 transitions, 6139 flow [2022-12-13 18:20:56,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 126.35714285714286) internal successors, (1769), 14 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:56,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:56,037 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] [2022-12-13 18:20:56,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 18:20:56,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 18:20:56,239 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)] === [2022-12-13 18:20:56,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:56,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1585301586, now seen corresponding path program 1 times [2022-12-13 18:20:56,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:20:56,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518771230] [2022-12-13 18:20:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:56,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:20:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:20:56,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:20:56,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518771230] [2022-12-13 18:20:56,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518771230] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:20:56,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168803512] [2022-12-13 18:20:56,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:56,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:56,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:20:56,383 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:20:56,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 18:20:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:56,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:20:56,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:20:56,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:20:56,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168803512] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:20:56,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:20:56,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 18:20:56,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893506633] [2022-12-13 18:20:56,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:20:56,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 18:20:56,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:20:56,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 18:20:56,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-13 18:20:56,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 294 [2022-12-13 18:20:56,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 477 transitions, 6139 flow. Second operand has 16 states, 16 states have (on average 120.4375) internal successors, (1927), 16 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:56,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:56,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 294 [2022-12-13 18:20:56,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:20:58,370 INFO L130 PetriNetUnfolder]: 3942/6419 cut-off events. [2022-12-13 18:20:58,370 INFO L131 PetriNetUnfolder]: For 60031/60119 co-relation queries the response was YES. [2022-12-13 18:20:58,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38736 conditions, 6419 events. 3942/6419 cut-off events. For 60031/60119 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 39920 event pairs, 545 based on Foata normal form. 93/6504 useless extension candidates. Maximal degree in co-relation 38370. Up to 1813 conditions per place. [2022-12-13 18:20:58,405 INFO L137 encePairwiseOnDemand]: 286/294 looper letters, 478 selfloop transitions, 112 changer transitions 36/644 dead transitions. [2022-12-13 18:20:58,405 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 644 transitions, 9042 flow [2022-12-13 18:20:58,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:20:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 18:20:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1532 transitions. [2022-12-13 18:20:58,407 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4342403628117914 [2022-12-13 18:20:58,407 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1532 transitions. [2022-12-13 18:20:58,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1532 transitions. [2022-12-13 18:20:58,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:20:58,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1532 transitions. [2022-12-13 18:20:58,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 127.66666666666667) internal successors, (1532), 12 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:58,411 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) [2022-12-13 18:20:58,411 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) [2022-12-13 18:20:58,411 INFO L175 Difference]: Start difference. First operand has 197 places, 477 transitions, 6139 flow. Second operand 12 states and 1532 transitions. [2022-12-13 18:20:58,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 644 transitions, 9042 flow [2022-12-13 18:20:58,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 644 transitions, 9029 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-13 18:20:58,632 INFO L231 Difference]: Finished difference. Result has 212 places, 482 transitions, 6593 flow [2022-12-13 18:20:58,632 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=6130, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6593, PETRI_PLACES=212, PETRI_TRANSITIONS=482} [2022-12-13 18:20:58,632 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2022-12-13 18:20:58,632 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 482 transitions, 6593 flow [2022-12-13 18:20:58,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 120.4375) internal successors, (1927), 16 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:58,633 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:20:58,633 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] [2022-12-13 18:20:58,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 18:20:58,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:58,834 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)] === [2022-12-13 18:20:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:20:58,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1269935430, now seen corresponding path program 2 times [2022-12-13 18:20:58,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:20:58,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322889566] [2022-12-13 18:20:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:20:58,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:20:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:20:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:20:58,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:20:58,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322889566] [2022-12-13 18:20:58,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322889566] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:20:58,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087042253] [2022-12-13 18:20:58,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:20:58,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:20:58,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:20:58,938 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:20:58,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 18:20:59,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:20:59,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:20:59,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 18:20:59,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:20:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:20:59,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:20:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:20:59,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087042253] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:20:59,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:20:59,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2022-12-13 18:20:59,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636836580] [2022-12-13 18:20:59,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:20:59,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 18:20:59,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:20:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 18:20:59,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-13 18:20:59,407 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 294 [2022-12-13 18:20:59,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 482 transitions, 6593 flow. Second operand has 16 states, 16 states have (on average 121.5625) internal successors, (1945), 16 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:20:59,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:20:59,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 294 [2022-12-13 18:20:59,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:21:00,950 INFO L130 PetriNetUnfolder]: 3305/5648 cut-off events. [2022-12-13 18:21:00,950 INFO L131 PetriNetUnfolder]: For 73068/73108 co-relation queries the response was YES. [2022-12-13 18:21:00,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35315 conditions, 5648 events. 3305/5648 cut-off events. For 73068/73108 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 37262 event pairs, 308 based on Foata normal form. 613/6255 useless extension candidates. Maximal degree in co-relation 34994. Up to 1503 conditions per place. [2022-12-13 18:21:00,981 INFO L137 encePairwiseOnDemand]: 285/294 looper letters, 388 selfloop transitions, 31 changer transitions 118/550 dead transitions. [2022-12-13 18:21:00,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 550 transitions, 7986 flow [2022-12-13 18:21:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:21:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 18:21:00,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1524 transitions. [2022-12-13 18:21:00,983 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2022-12-13 18:21:00,983 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1524 transitions. [2022-12-13 18:21:00,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1524 transitions. [2022-12-13 18:21:00,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:21:00,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1524 transitions. [2022-12-13 18:21:00,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 127.0) internal successors, (1524), 12 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:00,987 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) [2022-12-13 18:21:00,987 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) [2022-12-13 18:21:00,987 INFO L175 Difference]: Start difference. First operand has 212 places, 482 transitions, 6593 flow. Second operand 12 states and 1524 transitions. [2022-12-13 18:21:00,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 550 transitions, 7986 flow [2022-12-13 18:21:01,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 550 transitions, 7875 flow, removed 38 selfloop flow, removed 5 redundant places. [2022-12-13 18:21:01,255 INFO L231 Difference]: Finished difference. Result has 219 places, 302 transitions, 3911 flow [2022-12-13 18:21:01,255 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=4997, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3911, PETRI_PLACES=219, PETRI_TRANSITIONS=302} [2022-12-13 18:21:01,256 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 189 predicate places. [2022-12-13 18:21:01,256 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 302 transitions, 3911 flow [2022-12-13 18:21:01,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 121.5625) internal successors, (1945), 16 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:01,256 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:21:01,256 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:21:01,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 18:21:01,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:01,457 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)] === [2022-12-13 18:21:01,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:21:01,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1435182850, now seen corresponding path program 10 times [2022-12-13 18:21:01,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:21:01,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005224157] [2022-12-13 18:21:01,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:21:01,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:21:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:21:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:21:01,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:21:01,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005224157] [2022-12-13 18:21:01,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005224157] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:21:01,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021710488] [2022-12-13 18:21:01,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:21:01,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:01,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:21:01,570 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:21:01,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 18:21:01,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:21:01,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:21:01,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:21:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:21:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:21:01,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:21:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:21:01,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021710488] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:21:01,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:21:01,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2022-12-13 18:21:01,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974900760] [2022-12-13 18:21:01,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:21:01,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 18:21:01,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:21:01,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 18:21:01,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-12-13 18:21:02,055 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 294 [2022-12-13 18:21:02,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 302 transitions, 3911 flow. Second operand has 19 states, 19 states have (on average 121.78947368421052) internal successors, (2314), 19 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:02,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:21:02,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 294 [2022-12-13 18:21:02,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:21:03,334 INFO L130 PetriNetUnfolder]: 2565/4367 cut-off events. [2022-12-13 18:21:03,334 INFO L131 PetriNetUnfolder]: For 59373/59441 co-relation queries the response was YES. [2022-12-13 18:21:03,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28447 conditions, 4367 events. 2565/4367 cut-off events. For 59373/59441 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 27114 event pairs, 334 based on Foata normal form. 280/4626 useless extension candidates. Maximal degree in co-relation 28189. Up to 1195 conditions per place. [2022-12-13 18:21:03,365 INFO L137 encePairwiseOnDemand]: 285/294 looper letters, 265 selfloop transitions, 102 changer transitions 118/494 dead transitions. [2022-12-13 18:21:03,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 494 transitions, 6675 flow [2022-12-13 18:21:03,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 18:21:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 18:21:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2779 transitions. [2022-12-13 18:21:03,368 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4296536796536797 [2022-12-13 18:21:03,368 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2779 transitions. [2022-12-13 18:21:03,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2779 transitions. [2022-12-13 18:21:03,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:21:03,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2779 transitions. [2022-12-13 18:21:03,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 126.31818181818181) internal successors, (2779), 22 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:03,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 294.0) internal successors, (6762), 23 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:03,374 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 294.0) internal successors, (6762), 23 states have internal predecessors, (6762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:03,374 INFO L175 Difference]: Start difference. First operand has 219 places, 302 transitions, 3911 flow. Second operand 22 states and 2779 transitions. [2022-12-13 18:21:03,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 494 transitions, 6675 flow [2022-12-13 18:21:03,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 494 transitions, 6098 flow, removed 188 selfloop flow, removed 20 redundant places. [2022-12-13 18:21:03,610 INFO L231 Difference]: Finished difference. Result has 218 places, 250 transitions, 3115 flow [2022-12-13 18:21:03,611 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3115, PETRI_PLACES=218, PETRI_TRANSITIONS=250} [2022-12-13 18:21:03,611 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 188 predicate places. [2022-12-13 18:21:03,611 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 250 transitions, 3115 flow [2022-12-13 18:21:03,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 121.78947368421052) internal successors, (2314), 19 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:03,611 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:21:03,611 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:21:03,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 18:21:03,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:03,813 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)] === [2022-12-13 18:21:03,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:21:03,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1133769782, now seen corresponding path program 11 times [2022-12-13 18:21:03,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:21:03,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726930540] [2022-12-13 18:21:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:21:03,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:21:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:21:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:21:03,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:21:03,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726930540] [2022-12-13 18:21:03,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726930540] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:21:03,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445604904] [2022-12-13 18:21:03,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:21:03,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:03,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:21:03,928 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:21:03,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 18:21:04,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:21:04,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:21:04,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:21:04,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:21:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:21:04,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:21:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:21:04,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445604904] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:21:04,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:21:04,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-13 18:21:04,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785012997] [2022-12-13 18:21:04,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:21:04,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 18:21:04,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:21:04,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 18:21:04,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-13 18:21:04,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 294 [2022-12-13 18:21:04,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 250 transitions, 3115 flow. Second operand has 14 states, 14 states have (on average 126.35714285714286) internal successors, (1769), 14 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:04,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:21:04,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 294 [2022-12-13 18:21:04,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:21:04,723 INFO L130 PetriNetUnfolder]: 1130/1800 cut-off events. [2022-12-13 18:21:04,724 INFO L131 PetriNetUnfolder]: For 21975/22179 co-relation queries the response was YES. [2022-12-13 18:21:04,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12521 conditions, 1800 events. 1130/1800 cut-off events. For 21975/22179 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 8465 event pairs, 185 based on Foata normal form. 252/1991 useless extension candidates. Maximal degree in co-relation 12450. Up to 1194 conditions per place. [2022-12-13 18:21:04,737 INFO L137 encePairwiseOnDemand]: 289/294 looper letters, 171 selfloop transitions, 55 changer transitions 0/244 dead transitions. [2022-12-13 18:21:04,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 244 transitions, 3334 flow [2022-12-13 18:21:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:21:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 18:21:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 913 transitions. [2022-12-13 18:21:04,739 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44363459669582117 [2022-12-13 18:21:04,739 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 913 transitions. [2022-12-13 18:21:04,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 913 transitions. [2022-12-13 18:21:04,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:21:04,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 913 transitions. [2022-12-13 18:21:04,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.42857142857142) internal successors, (913), 7 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:04,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:04,741 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 294.0) internal successors, (2352), 8 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:04,741 INFO L175 Difference]: Start difference. First operand has 218 places, 250 transitions, 3115 flow. Second operand 7 states and 913 transitions. [2022-12-13 18:21:04,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 244 transitions, 3334 flow [2022-12-13 18:21:04,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 244 transitions, 2798 flow, removed 213 selfloop flow, removed 26 redundant places. [2022-12-13 18:21:04,795 INFO L231 Difference]: Finished difference. Result has 149 places, 206 transitions, 2181 flow [2022-12-13 18:21:04,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2181, PETRI_PLACES=149, PETRI_TRANSITIONS=206} [2022-12-13 18:21:04,795 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2022-12-13 18:21:04,795 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 206 transitions, 2181 flow [2022-12-13 18:21:04,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 126.35714285714286) internal successors, (1769), 14 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:04,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:21:04,796 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:21:04,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 18:21:04,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 18:21:04,997 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)] === [2022-12-13 18:21:04,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:21:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1362596831, now seen corresponding path program 12 times [2022-12-13 18:21:04,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:21:04,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179967196] [2022-12-13 18:21:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:21:04,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:21:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:21:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:05,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:21:05,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179967196] [2022-12-13 18:21:05,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179967196] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:21:05,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317360524] [2022-12-13 18:21:05,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:21:05,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:05,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:21:05,132 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:21:05,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 18:21:05,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 18:21:05,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:21:05,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:21:05,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:21:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:05,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:21:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:05,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317360524] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:21:05,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:21:05,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-12-13 18:21:05,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908129548] [2022-12-13 18:21:05,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:21:05,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 18:21:05,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:21:05,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 18:21:05,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-12-13 18:21:05,810 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 294 [2022-12-13 18:21:05,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 206 transitions, 2181 flow. Second operand has 21 states, 21 states have (on average 119.85714285714286) internal successors, (2517), 21 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:05,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:21:05,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 294 [2022-12-13 18:21:05,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:21:06,871 INFO L130 PetriNetUnfolder]: 2327/3713 cut-off events. [2022-12-13 18:21:06,871 INFO L131 PetriNetUnfolder]: For 29575/29610 co-relation queries the response was YES. [2022-12-13 18:21:06,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22077 conditions, 3713 events. 2327/3713 cut-off events. For 29575/29610 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19792 event pairs, 230 based on Foata normal form. 33/3738 useless extension candidates. Maximal degree in co-relation 22026. Up to 1325 conditions per place. [2022-12-13 18:21:06,904 INFO L137 encePairwiseOnDemand]: 286/294 looper letters, 354 selfloop transitions, 146 changer transitions 0/506 dead transitions. [2022-12-13 18:21:06,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 506 transitions, 6324 flow [2022-12-13 18:21:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 18:21:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 18:21:06,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2280 transitions. [2022-12-13 18:21:06,907 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4308390022675737 [2022-12-13 18:21:06,907 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2280 transitions. [2022-12-13 18:21:06,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2280 transitions. [2022-12-13 18:21:06,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:21:06,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2280 transitions. [2022-12-13 18:21:06,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 126.66666666666667) internal successors, (2280), 18 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:06,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 294.0) internal successors, (5586), 19 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:06,915 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 294.0) internal successors, (5586), 19 states have internal predecessors, (5586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:06,915 INFO L175 Difference]: Start difference. First operand has 149 places, 206 transitions, 2181 flow. Second operand 18 states and 2280 transitions. [2022-12-13 18:21:06,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 506 transitions, 6324 flow [2022-12-13 18:21:07,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 506 transitions, 6036 flow, removed 27 selfloop flow, removed 6 redundant places. [2022-12-13 18:21:07,039 INFO L231 Difference]: Finished difference. Result has 165 places, 294 transitions, 3745 flow [2022-12-13 18:21:07,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3745, PETRI_PLACES=165, PETRI_TRANSITIONS=294} [2022-12-13 18:21:07,040 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2022-12-13 18:21:07,040 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 294 transitions, 3745 flow [2022-12-13 18:21:07,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 119.85714285714286) internal successors, (2517), 21 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:07,041 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:21:07,041 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:21:07,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-13 18:21:07,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 18:21:07,242 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)] === [2022-12-13 18:21:07,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:21:07,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1822721101, now seen corresponding path program 13 times [2022-12-13 18:21:07,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:21:07,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553715379] [2022-12-13 18:21:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:21:07,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:21:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:21:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:07,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:21:07,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553715379] [2022-12-13 18:21:07,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553715379] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:21:07,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151153440] [2022-12-13 18:21:07,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:21:07,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:07,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:21:07,348 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:21:07,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 18:21:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:21:07,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:21:07,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:21:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:07,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:21:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:07,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151153440] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:21:07,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:21:07,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-12-13 18:21:07,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251733133] [2022-12-13 18:21:07,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:21:07,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 18:21:07,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:21:07,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 18:21:07,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-12-13 18:21:07,923 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 294 [2022-12-13 18:21:07,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 294 transitions, 3745 flow. Second operand has 20 states, 20 states have (on average 120.0) internal successors, (2400), 20 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:07,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:21:07,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 294 [2022-12-13 18:21:07,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:21:08,654 INFO L130 PetriNetUnfolder]: 2372/3791 cut-off events. [2022-12-13 18:21:08,654 INFO L131 PetriNetUnfolder]: For 39615/39651 co-relation queries the response was YES. [2022-12-13 18:21:08,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25023 conditions, 3791 events. 2372/3791 cut-off events. For 39615/39651 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 20331 event pairs, 336 based on Foata normal form. 46/3830 useless extension candidates. Maximal degree in co-relation 24967. Up to 1641 conditions per place. [2022-12-13 18:21:08,676 INFO L137 encePairwiseOnDemand]: 286/294 looper letters, 271 selfloop transitions, 118 changer transitions 0/395 dead transitions. [2022-12-13 18:21:08,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 395 transitions, 5562 flow [2022-12-13 18:21:08,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:21:08,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 18:21:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1129 transitions. [2022-12-13 18:21:08,678 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42668178382464095 [2022-12-13 18:21:08,678 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1129 transitions. [2022-12-13 18:21:08,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1129 transitions. [2022-12-13 18:21:08,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:21:08,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1129 transitions. [2022-12-13 18:21:08,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 125.44444444444444) internal successors, (1129), 9 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:08,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:08,680 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:08,680 INFO L175 Difference]: Start difference. First operand has 165 places, 294 transitions, 3745 flow. Second operand 9 states and 1129 transitions. [2022-12-13 18:21:08,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 395 transitions, 5562 flow [2022-12-13 18:21:08,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 395 transitions, 5277 flow, removed 140 selfloop flow, removed 3 redundant places. [2022-12-13 18:21:08,824 INFO L231 Difference]: Finished difference. Result has 171 places, 300 transitions, 3788 flow [2022-12-13 18:21:08,824 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=3464, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3788, PETRI_PLACES=171, PETRI_TRANSITIONS=300} [2022-12-13 18:21:08,824 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2022-12-13 18:21:08,824 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 300 transitions, 3788 flow [2022-12-13 18:21:08,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 120.0) internal successors, (2400), 20 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:08,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:21:08,824 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:21:08,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 18:21:09,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 18:21:09,026 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)] === [2022-12-13 18:21:09,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:21:09,027 INFO L85 PathProgramCache]: Analyzing trace with hash -90105891, now seen corresponding path program 14 times [2022-12-13 18:21:09,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:21:09,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606566504] [2022-12-13 18:21:09,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:21:09,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:21:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:21:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:09,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:21:09,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606566504] [2022-12-13 18:21:09,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606566504] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:21:09,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093759549] [2022-12-13 18:21:09,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:21:09,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:09,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:21:09,142 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:21:09,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 18:21:09,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:21:09,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:21:09,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:21:09,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:21:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:09,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:21:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:09,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093759549] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:21:09,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:21:09,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-12-13 18:21:09,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023520971] [2022-12-13 18:21:09,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:21:09,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 18:21:09,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:21:09,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 18:21:09,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-12-13 18:21:09,847 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 294 [2022-12-13 18:21:09,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 300 transitions, 3788 flow. Second operand has 21 states, 21 states have (on average 119.85714285714286) internal successors, (2517), 21 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:09,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:21:09,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 294 [2022-12-13 18:21:09,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:21:10,845 INFO L130 PetriNetUnfolder]: 2330/3701 cut-off events. [2022-12-13 18:21:10,845 INFO L131 PetriNetUnfolder]: For 34626/34658 co-relation queries the response was YES. [2022-12-13 18:21:10,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23983 conditions, 3701 events. 2330/3701 cut-off events. For 34626/34658 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 19584 event pairs, 236 based on Foata normal form. 42/3736 useless extension candidates. Maximal degree in co-relation 23926. Up to 1358 conditions per place. [2022-12-13 18:21:10,869 INFO L137 encePairwiseOnDemand]: 286/294 looper letters, 329 selfloop transitions, 145 changer transitions 0/480 dead transitions. [2022-12-13 18:21:10,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 480 transitions, 6448 flow [2022-12-13 18:21:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 18:21:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 18:21:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1902 transitions. [2022-12-13 18:21:10,871 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4312925170068027 [2022-12-13 18:21:10,871 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1902 transitions. [2022-12-13 18:21:10,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1902 transitions. [2022-12-13 18:21:10,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:21:10,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1902 transitions. [2022-12-13 18:21:10,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 126.8) internal successors, (1902), 15 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:10,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 294.0) internal successors, (4704), 16 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:10,875 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 294.0) internal successors, (4704), 16 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:10,876 INFO L175 Difference]: Start difference. First operand has 171 places, 300 transitions, 3788 flow. Second operand 15 states and 1902 transitions. [2022-12-13 18:21:10,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 480 transitions, 6448 flow [2022-12-13 18:21:11,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 480 transitions, 6335 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-12-13 18:21:11,015 INFO L231 Difference]: Finished difference. Result has 179 places, 299 transitions, 3956 flow [2022-12-13 18:21:11,015 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=3666, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3956, PETRI_PLACES=179, PETRI_TRANSITIONS=299} [2022-12-13 18:21:11,015 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 149 predicate places. [2022-12-13 18:21:11,016 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 299 transitions, 3956 flow [2022-12-13 18:21:11,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 119.85714285714286) internal successors, (2517), 21 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:11,016 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:21:11,016 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:21:11,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-13 18:21:11,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:11,217 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 18:21:11,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:21:11,218 INFO L85 PathProgramCache]: Analyzing trace with hash 14506961, now seen corresponding path program 15 times [2022-12-13 18:21:11,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:21:11,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419658208] [2022-12-13 18:21:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:21:11,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:21:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:21:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:11,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:21:11,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419658208] [2022-12-13 18:21:11,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419658208] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:21:11,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712198910] [2022-12-13 18:21:11,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:21:11,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:11,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:21:11,323 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:21:11,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 18:21:11,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 18:21:11,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:21:11,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:21:11,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:21:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:11,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:21:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:11,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712198910] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:21:11,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:21:11,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-12-13 18:21:11,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218630790] [2022-12-13 18:21:11,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:21:11,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 18:21:11,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:21:11,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 18:21:11,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-12-13 18:21:11,873 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 294 [2022-12-13 18:21:11,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 299 transitions, 3956 flow. Second operand has 20 states, 20 states have (on average 120.0) internal successors, (2400), 20 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:11,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:21:11,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 294 [2022-12-13 18:21:11,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:21:12,686 INFO L130 PetriNetUnfolder]: 2298/3619 cut-off events. [2022-12-13 18:21:12,686 INFO L131 PetriNetUnfolder]: For 36882/36910 co-relation queries the response was YES. [2022-12-13 18:21:12,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24115 conditions, 3619 events. 2298/3619 cut-off events. For 36882/36910 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18592 event pairs, 560 based on Foata normal form. 22/3632 useless extension candidates. Maximal degree in co-relation 24058. Up to 2823 conditions per place. [2022-12-13 18:21:12,708 INFO L137 encePairwiseOnDemand]: 286/294 looper letters, 274 selfloop transitions, 85 changer transitions 0/365 dead transitions. [2022-12-13 18:21:12,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 365 transitions, 5311 flow [2022-12-13 18:21:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:21:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 18:21:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1123 transitions. [2022-12-13 18:21:12,710 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42441421012849584 [2022-12-13 18:21:12,710 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1123 transitions. [2022-12-13 18:21:12,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1123 transitions. [2022-12-13 18:21:12,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:21:12,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1123 transitions. [2022-12-13 18:21:12,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 124.77777777777777) internal successors, (1123), 9 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:12,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:12,715 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:12,715 INFO L175 Difference]: Start difference. First operand has 179 places, 299 transitions, 3956 flow. Second operand 9 states and 1123 transitions. [2022-12-13 18:21:12,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 365 transitions, 5311 flow [2022-12-13 18:21:12,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 365 transitions, 4991 flow, removed 12 selfloop flow, removed 14 redundant places. [2022-12-13 18:21:12,846 INFO L231 Difference]: Finished difference. Result has 174 places, 298 transitions, 3783 flow [2022-12-13 18:21:12,847 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=3576, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3783, PETRI_PLACES=174, PETRI_TRANSITIONS=298} [2022-12-13 18:21:12,847 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2022-12-13 18:21:12,847 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 298 transitions, 3783 flow [2022-12-13 18:21:12,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 120.0) internal successors, (2400), 20 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:12,847 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:21:12,847 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:21:12,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-13 18:21:13,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:13,048 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 18:21:13,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:21:13,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1615881379, now seen corresponding path program 16 times [2022-12-13 18:21:13,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:21:13,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472108721] [2022-12-13 18:21:13,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:21:13,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:21:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:21:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:13,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:21:13,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472108721] [2022-12-13 18:21:13,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472108721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:21:13,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469564926] [2022-12-13 18:21:13,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:21:13,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:13,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:21:13,150 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:21:13,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 18:21:13,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:21:13,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:21:13,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:21:13,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:21:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:13,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:21:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:13,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469564926] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:21:13,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:21:13,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2022-12-13 18:21:13,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444767703] [2022-12-13 18:21:13,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:21:13,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 18:21:13,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:21:13,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 18:21:13,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-12-13 18:21:13,585 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 294 [2022-12-13 18:21:13,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 298 transitions, 3783 flow. Second operand has 16 states, 16 states have (on average 116.6875) internal successors, (1867), 16 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:13,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:21:13,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 294 [2022-12-13 18:21:13,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:21:15,027 INFO L130 PetriNetUnfolder]: 2824/4429 cut-off events. [2022-12-13 18:21:15,028 INFO L131 PetriNetUnfolder]: For 41737/41737 co-relation queries the response was YES. [2022-12-13 18:21:15,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28613 conditions, 4429 events. 2824/4429 cut-off events. For 41737/41737 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 23437 event pairs, 290 based on Foata normal form. 28/4455 useless extension candidates. Maximal degree in co-relation 28556. Up to 1866 conditions per place. [2022-12-13 18:21:15,058 INFO L137 encePairwiseOnDemand]: 284/294 looper letters, 362 selfloop transitions, 159 changer transitions 0/521 dead transitions. [2022-12-13 18:21:15,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 521 transitions, 7324 flow [2022-12-13 18:21:15,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 18:21:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 18:21:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2304 transitions. [2022-12-13 18:21:15,060 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41245972073039744 [2022-12-13 18:21:15,060 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2304 transitions. [2022-12-13 18:21:15,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2304 transitions. [2022-12-13 18:21:15,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:21:15,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2304 transitions. [2022-12-13 18:21:15,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 121.26315789473684) internal successors, (2304), 19 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:15,068 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) [2022-12-13 18:21:15,069 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) [2022-12-13 18:21:15,069 INFO L175 Difference]: Start difference. First operand has 174 places, 298 transitions, 3783 flow. Second operand 19 states and 2304 transitions. [2022-12-13 18:21:15,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 521 transitions, 7324 flow [2022-12-13 18:21:15,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 521 transitions, 7060 flow, removed 27 selfloop flow, removed 10 redundant places. [2022-12-13 18:21:15,248 INFO L231 Difference]: Finished difference. Result has 189 places, 351 transitions, 4791 flow [2022-12-13 18:21:15,249 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=3503, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4791, PETRI_PLACES=189, PETRI_TRANSITIONS=351} [2022-12-13 18:21:15,249 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2022-12-13 18:21:15,249 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 351 transitions, 4791 flow [2022-12-13 18:21:15,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 116.6875) internal successors, (1867), 16 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:15,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:21:15,250 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:21:15,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 18:21:15,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 18:21:15,450 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 18:21:15,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:21:15,451 INFO L85 PathProgramCache]: Analyzing trace with hash 345648277, now seen corresponding path program 17 times [2022-12-13 18:21:15,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:21:15,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600447298] [2022-12-13 18:21:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:21:15,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:21:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:21:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:15,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:21:15,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600447298] [2022-12-13 18:21:15,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600447298] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:21:15,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890786192] [2022-12-13 18:21:15,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:21:15,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:15,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:21:15,608 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:21:15,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 18:21:15,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:21:15,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:21:15,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:21:15,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:21:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:15,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:21:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:15,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890786192] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:21:15,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:21:15,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-13 18:21:15,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335816698] [2022-12-13 18:21:15,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:21:15,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 18:21:15,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:21:15,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 18:21:15,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-13 18:21:16,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 294 [2022-12-13 18:21:16,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 351 transitions, 4791 flow. Second operand has 19 states, 19 states have (on average 116.36842105263158) internal successors, (2211), 19 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:16,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:21:16,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 294 [2022-12-13 18:21:16,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:21:18,058 INFO L130 PetriNetUnfolder]: 2945/4660 cut-off events. [2022-12-13 18:21:18,058 INFO L131 PetriNetUnfolder]: For 59118/59118 co-relation queries the response was YES. [2022-12-13 18:21:18,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33123 conditions, 4660 events. 2945/4660 cut-off events. For 59118/59118 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 25312 event pairs, 281 based on Foata normal form. 20/4678 useless extension candidates. Maximal degree in co-relation 33058. Up to 1884 conditions per place. [2022-12-13 18:21:18,087 INFO L137 encePairwiseOnDemand]: 284/294 looper letters, 377 selfloop transitions, 263 changer transitions 0/640 dead transitions. [2022-12-13 18:21:18,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 640 transitions, 9303 flow [2022-12-13 18:21:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 18:21:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-13 18:21:18,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4097 transitions. [2022-12-13 18:21:18,090 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4098639455782313 [2022-12-13 18:21:18,090 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4097 transitions. [2022-12-13 18:21:18,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4097 transitions. [2022-12-13 18:21:18,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:21:18,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4097 transitions. [2022-12-13 18:21:18,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 120.5) internal successors, (4097), 34 states have internal predecessors, (4097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:18,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 294.0) internal successors, (10290), 35 states have internal predecessors, (10290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:18,100 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 294.0) internal successors, (10290), 35 states have internal predecessors, (10290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:18,100 INFO L175 Difference]: Start difference. First operand has 189 places, 351 transitions, 4791 flow. Second operand 34 states and 4097 transitions. [2022-12-13 18:21:18,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 640 transitions, 9303 flow [2022-12-13 18:21:18,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 640 transitions, 8946 flow, removed 128 selfloop flow, removed 7 redundant places. [2022-12-13 18:21:18,373 INFO L231 Difference]: Finished difference. Result has 233 places, 447 transitions, 6922 flow [2022-12-13 18:21:18,374 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=4543, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6922, PETRI_PLACES=233, PETRI_TRANSITIONS=447} [2022-12-13 18:21:18,374 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2022-12-13 18:21:18,375 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 447 transitions, 6922 flow [2022-12-13 18:21:18,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 116.36842105263158) internal successors, (2211), 19 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:18,375 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:21:18,375 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:21:18,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 18:21:18,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:18,576 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 18:21:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:21:18,577 INFO L85 PathProgramCache]: Analyzing trace with hash 317942647, now seen corresponding path program 18 times [2022-12-13 18:21:18,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:21:18,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087940647] [2022-12-13 18:21:18,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:21:18,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:21:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:21:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:18,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:21:18,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087940647] [2022-12-13 18:21:18,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087940647] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:21:18,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602891624] [2022-12-13 18:21:18,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:21:18,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:18,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:21:18,725 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:21:18,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 18:21:18,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 18:21:18,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:21:18,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:21:18,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:21:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:18,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:21:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:19,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602891624] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:21:19,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:21:19,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-12-13 18:21:19,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170513592] [2022-12-13 18:21:19,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:21:19,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 18:21:19,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:21:19,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 18:21:19,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-12-13 18:21:19,350 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 294 [2022-12-13 18:21:19,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 447 transitions, 6922 flow. Second operand has 21 states, 21 states have (on average 119.85714285714286) internal successors, (2517), 21 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:19,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:21:19,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 294 [2022-12-13 18:21:19,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:21:20,773 INFO L130 PetriNetUnfolder]: 2825/4483 cut-off events. [2022-12-13 18:21:20,773 INFO L131 PetriNetUnfolder]: For 72334/72334 co-relation queries the response was YES. [2022-12-13 18:21:20,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34403 conditions, 4483 events. 2825/4483 cut-off events. For 72334/72334 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24327 event pairs, 520 based on Foata normal form. 34/4514 useless extension candidates. Maximal degree in co-relation 34324. Up to 2366 conditions per place. [2022-12-13 18:21:20,807 INFO L137 encePairwiseOnDemand]: 286/294 looper letters, 317 selfloop transitions, 181 changer transitions 0/519 dead transitions. [2022-12-13 18:21:20,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 519 transitions, 8485 flow [2022-12-13 18:21:20,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 18:21:20,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 18:21:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1263 transitions. [2022-12-13 18:21:20,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42959183673469387 [2022-12-13 18:21:20,809 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1263 transitions. [2022-12-13 18:21:20,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1263 transitions. [2022-12-13 18:21:20,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:21:20,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1263 transitions. [2022-12-13 18:21:20,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 126.3) internal successors, (1263), 10 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:20,811 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) [2022-12-13 18:21:20,811 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) [2022-12-13 18:21:20,811 INFO L175 Difference]: Start difference. First operand has 233 places, 447 transitions, 6922 flow. Second operand 10 states and 1263 transitions. [2022-12-13 18:21:20,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 519 transitions, 8485 flow [2022-12-13 18:21:21,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 519 transitions, 7970 flow, removed 187 selfloop flow, removed 8 redundant places. [2022-12-13 18:21:21,208 INFO L231 Difference]: Finished difference. Result has 231 places, 441 transitions, 6691 flow [2022-12-13 18:21:21,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=6329, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6691, PETRI_PLACES=231, PETRI_TRANSITIONS=441} [2022-12-13 18:21:21,208 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 201 predicate places. [2022-12-13 18:21:21,208 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 441 transitions, 6691 flow [2022-12-13 18:21:21,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 119.85714285714286) internal successors, (2517), 21 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:21,209 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:21:21,209 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:21:21,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 18:21:21,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:21,410 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 18:21:21,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:21:21,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1157416573, now seen corresponding path program 19 times [2022-12-13 18:21:21,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:21:21,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919682755] [2022-12-13 18:21:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:21:21,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:21:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:21:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:21,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:21:21,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919682755] [2022-12-13 18:21:21,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919682755] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:21:21,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144505615] [2022-12-13 18:21:21,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:21:21,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:21,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:21:21,534 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:21:21,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 18:21:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:21:21,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:21:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:21:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:21,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:21:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:21:21,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144505615] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:21:21,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:21:21,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-13 18:21:21,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484811078] [2022-12-13 18:21:21,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:21:21,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 18:21:21,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:21:21,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 18:21:21,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-12-13 18:21:22,020 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 294 [2022-12-13 18:21:22,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 441 transitions, 6691 flow. Second operand has 19 states, 19 states have (on average 120.05263157894737) internal successors, (2281), 19 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:22,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:21:22,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 294 [2022-12-13 18:21:22,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:21:22,997 INFO L130 PetriNetUnfolder]: 2754/4318 cut-off events. [2022-12-13 18:21:22,997 INFO L131 PetriNetUnfolder]: For 68505/68505 co-relation queries the response was YES. [2022-12-13 18:21:23,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32585 conditions, 4318 events. 2754/4318 cut-off events. For 68505/68505 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 22798 event pairs, 546 based on Foata normal form. 48/4363 useless extension candidates. Maximal degree in co-relation 32508. Up to 2468 conditions per place. [2022-12-13 18:21:23,030 INFO L137 encePairwiseOnDemand]: 286/294 looper letters, 319 selfloop transitions, 144 changer transitions 0/483 dead transitions. [2022-12-13 18:21:23,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 483 transitions, 7834 flow [2022-12-13 18:21:23,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:21:23,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 18:21:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1130 transitions. [2022-12-13 18:21:23,032 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4270597127739985 [2022-12-13 18:21:23,032 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1130 transitions. [2022-12-13 18:21:23,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1130 transitions. [2022-12-13 18:21:23,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:21:23,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1130 transitions. [2022-12-13 18:21:23,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 125.55555555555556) internal successors, (1130), 9 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:23,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:23,034 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:23,034 INFO L175 Difference]: Start difference. First operand has 231 places, 441 transitions, 6691 flow. Second operand 9 states and 1130 transitions. [2022-12-13 18:21:23,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 483 transitions, 7834 flow [2022-12-13 18:21:23,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 483 transitions, 7463 flow, removed 8 selfloop flow, removed 10 redundant places. [2022-12-13 18:21:23,348 INFO L231 Difference]: Finished difference. Result has 226 places, 426 transitions, 6365 flow [2022-12-13 18:21:23,349 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=5991, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6365, PETRI_PLACES=226, PETRI_TRANSITIONS=426} [2022-12-13 18:21:23,349 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 196 predicate places. [2022-12-13 18:21:23,349 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 426 transitions, 6365 flow [2022-12-13 18:21:23,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 120.05263157894737) internal successors, (2281), 19 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:21:23,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:21:23,349 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:21:23,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 18:21:23,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 18:21:23,550 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 18:21:23,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:21:23,551 INFO L85 PathProgramCache]: Analyzing trace with hash 762994514, now seen corresponding path program 3 times [2022-12-13 18:21:23,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:21:23,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271156368] [2022-12-13 18:21:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:21:23,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:21:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:21:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:21:24,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:21:24,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271156368] [2022-12-13 18:21:24,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271156368] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:21:24,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504339711] [2022-12-13 18:21:24,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:21:24,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:21:24,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:21:24,770 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:21:24,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b14969a1-149f-415e-b2f1-3350cac9643f/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 18:21:24,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 18:21:24,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:21:24,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 18:21:24,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:21:25,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:21:25,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 147 [2022-12-13 18:21:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:21:27,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:21:30,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:21:30,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 705 treesize of output 1257 [2022-12-13 18:21:33,702 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:21:40,606 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 18:22:06,632 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:22:20,772 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:22:28,522 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 18:22:54,242 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:23:18,480 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:23:39,138 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:23:51,874 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:24:02,974 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 18:24:37,780 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-12-13 18:26:21,310 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 18:27:14,141 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:27:28,088 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 18:28:06,503 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-12-13 18:30:03,264 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 18:31:00,571 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:31:19,045 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 18:32:08,234 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:32:36,981 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:32:55,974 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-12-13 18:33:48,979 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:34:11,421 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts.