./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:41:36,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:41:36,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:41:36,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:41:36,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:41:36,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:41:36,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:41:36,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:41:36,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:41:36,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:41:36,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:41:36,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:41:36,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:41:36,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:41:36,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:41:36,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:41:36,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:41:36,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:41:36,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:41:36,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:41:36,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:41:36,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:41:36,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:41:36,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:41:36,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:41:36,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:41:36,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:41:36,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:41:36,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:41:36,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:41:36,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:41:36,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:41:36,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:41:36,596 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:41:36,597 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:41:36,597 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:41:36,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:41:36,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:41:36,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:41:36,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:41:36,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:41:36,604 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:41:36,652 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:41:36,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:41:36,654 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:41:36,654 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:41:36,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:41:36,656 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:41:36,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:41:36,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:41:36,658 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:41:36,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:41:36,660 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:41:36,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:41:36,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:41:36,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:41:36,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:41:36,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:41:36,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:41:36,663 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:41:36,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:41:36,663 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:41:36,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:41:36,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:41:36,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:41:36,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:41:36,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:41:36,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:41:36,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:41:36,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:41:36,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:41:36,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:41:36,669 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:41:36,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:41:36,670 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:41:36,670 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:41:36,670 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_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 [2022-11-25 17:41:37,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:41:37,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:41:37,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:41:37,119 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:41:37,119 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:41:37,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2022-11-25 17:41:40,566 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:41:40,871 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:41:40,872 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2022-11-25 17:41:40,880 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/data/23202ac29/9a38c9daa4f2401a933a38f74e05364d/FLAGc57da0c52 [2022-11-25 17:41:40,899 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/data/23202ac29/9a38c9daa4f2401a933a38f74e05364d [2022-11-25 17:41:40,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:41:40,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:41:40,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:41:40,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:41:40,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:41:40,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:41:40" (1/1) ... [2022-11-25 17:41:40,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57187e81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:40, skipping insertion in model container [2022-11-25 17:41:40,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:41:40" (1/1) ... [2022-11-25 17:41:40,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:41:40,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:41:41,142 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,161 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,162 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,163 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,165 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,166 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,168 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,170 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,170 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,171 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,172 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,173 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,188 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,189 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,195 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,196 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,197 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,198 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,198 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,199 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,200 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,212 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,219 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_f10161bd-0f0f-47ff-b885-cb11632257c9/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2022-11-25 17:41:41,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:41:41,269 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:41:41,297 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,301 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,303 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,306 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,307 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,309 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,311 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,314 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,315 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,316 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,320 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,321 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,323 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,325 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,337 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,338 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,339 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,343 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,344 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,345 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:41:41,346 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:41:41,350 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_f10161bd-0f0f-47ff-b885-cb11632257c9/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2022-11-25 17:41:41,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:41:41,384 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:41:41,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:41 WrapperNode [2022-11-25 17:41:41,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:41:41,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:41:41,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:41:41,387 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:41:41,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:41" (1/1) ... [2022-11-25 17:41:41,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:41" (1/1) ... [2022-11-25 17:41:41,466 INFO L138 Inliner]: procedures = 27, calls = 73, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 245 [2022-11-25 17:41:41,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:41:41,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:41:41,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:41:41,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:41:41,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:41" (1/1) ... [2022-11-25 17:41:41,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:41" (1/1) ... [2022-11-25 17:41:41,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:41" (1/1) ... [2022-11-25 17:41:41,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:41" (1/1) ... [2022-11-25 17:41:41,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:41" (1/1) ... [2022-11-25 17:41:41,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:41" (1/1) ... [2022-11-25 17:41:41,528 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:41" (1/1) ... [2022-11-25 17:41:41,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:41" (1/1) ... [2022-11-25 17:41:41,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:41:41,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:41:41,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:41:41,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:41:41,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:41" (1/1) ... [2022-11-25 17:41:41,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:41:41,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:41,582 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:41:41,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:41:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:41:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:41:41,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:41:41,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:41:41,629 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:41:41,629 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:41:41,629 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:41:41,629 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:41:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 17:41:41,630 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 17:41:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-25 17:41:41,630 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-25 17:41:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:41:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:41:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:41:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:41:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:41:41,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:41:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:41:41,633 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:41:41,848 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:41:41,865 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:41:42,405 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:41:42,881 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:41:42,895 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 17:41:42,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:41:42 BoogieIcfgContainer [2022-11-25 17:41:42,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:41:42,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:41:42,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:41:42,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:41:42,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:41:40" (1/3) ... [2022-11-25 17:41:42,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fabc02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:41:42, skipping insertion in model container [2022-11-25 17:41:42,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:41:41" (2/3) ... [2022-11-25 17:41:42,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60fabc02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:41:42, skipping insertion in model container [2022-11-25 17:41:42,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:41:42" (3/3) ... [2022-11-25 17:41:42,914 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2022-11-25 17:41:42,925 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:41:42,939 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:41:42,940 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:41:42,940 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:41:43,067 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-11-25 17:41:43,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 205 transitions, 454 flow [2022-11-25 17:41:43,289 INFO L130 PetriNetUnfolder]: 14/190 cut-off events. [2022-11-25 17:41:43,289 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 17:41:43,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 190 events. 14/190 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 160 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2022-11-25 17:41:43,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 205 transitions, 454 flow [2022-11-25 17:41:43,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 181 transitions, 392 flow [2022-11-25 17:41:43,333 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:41:43,364 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 181 transitions, 392 flow [2022-11-25 17:41:43,367 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 181 transitions, 392 flow [2022-11-25 17:41:43,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 181 transitions, 392 flow [2022-11-25 17:41:43,450 INFO L130 PetriNetUnfolder]: 14/181 cut-off events. [2022-11-25 17:41:43,450 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 17:41:43,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 181 events. 14/181 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 158 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 162. Up to 3 conditions per place. [2022-11-25 17:41:43,455 INFO L119 LiptonReduction]: Number of co-enabled transitions 2612 [2022-11-25 17:41:52,926 INFO L134 LiptonReduction]: Checked pairs total: 7088 [2022-11-25 17:41:52,927 INFO L136 LiptonReduction]: Total number of compositions: 170 [2022-11-25 17:41:52,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:41:52,957 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;@5075cdef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:41:52,958 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-25 17:41:52,970 INFO L130 PetriNetUnfolder]: 6/38 cut-off events. [2022-11-25 17:41:52,971 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-25 17:41:52,971 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:52,972 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:52,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:41:52,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:52,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1308200355, now seen corresponding path program 1 times [2022-11-25 17:41:52,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:52,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755059272] [2022-11-25 17:41:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:52,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:53,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:53,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755059272] [2022-11-25 17:41:53,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755059272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:41:53,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:41:53,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:41:53,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025259284] [2022-11-25 17:41:53,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:41:53,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:41:53,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:53,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:41:53,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:41:53,828 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 377 [2022-11-25 17:41:53,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:53,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:53,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 377 [2022-11-25 17:41:53,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:54,517 INFO L130 PetriNetUnfolder]: 1658/2379 cut-off events. [2022-11-25 17:41:54,517 INFO L131 PetriNetUnfolder]: For 374/387 co-relation queries the response was YES. [2022-11-25 17:41:54,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5103 conditions, 2379 events. 1658/2379 cut-off events. For 374/387 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9813 event pairs, 523 based on Foata normal form. 5/1793 useless extension candidates. Maximal degree in co-relation 5002. Up to 1081 conditions per place. [2022-11-25 17:41:54,542 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 67 selfloop transitions, 7 changer transitions 1/84 dead transitions. [2022-11-25 17:41:54,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 84 transitions, 396 flow [2022-11-25 17:41:54,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:41:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:41:54,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 752 transitions. [2022-11-25 17:41:54,566 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4986737400530504 [2022-11-25 17:41:54,567 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 752 transitions. [2022-11-25 17:41:54,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 752 transitions. [2022-11-25 17:41:54,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:54,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 752 transitions. [2022-11-25 17:41:54,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:54,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:54,599 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:54,602 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 108 flow. Second operand 4 states and 752 transitions. [2022-11-25 17:41:54,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 84 transitions, 396 flow [2022-11-25 17:41:54,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 84 transitions, 344 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-25 17:41:54,615 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 133 flow [2022-11-25 17:41:54,617 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2022-11-25 17:41:54,621 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2022-11-25 17:41:54,622 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 133 flow [2022-11-25 17:41:54,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:54,623 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:54,623 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:54,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:41:54,624 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:41:54,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:54,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2085564935, now seen corresponding path program 2 times [2022-11-25 17:41:54,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:54,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657360562] [2022-11-25 17:41:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:54,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:54,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:54,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657360562] [2022-11-25 17:41:54,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657360562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:41:54,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:41:54,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:41:54,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520976425] [2022-11-25 17:41:54,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:41:54,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:41:54,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:54,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:41:54,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:41:54,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 377 [2022-11-25 17:41:54,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:54,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:54,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 377 [2022-11-25 17:41:55,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:55,747 INFO L130 PetriNetUnfolder]: 2346/3398 cut-off events. [2022-11-25 17:41:55,748 INFO L131 PetriNetUnfolder]: For 760/760 co-relation queries the response was YES. [2022-11-25 17:41:55,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8017 conditions, 3398 events. 2346/3398 cut-off events. For 760/760 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15097 event pairs, 975 based on Foata normal form. 1/2822 useless extension candidates. Maximal degree in co-relation 3909. Up to 1875 conditions per place. [2022-11-25 17:41:55,772 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 71 selfloop transitions, 8 changer transitions 1/89 dead transitions. [2022-11-25 17:41:55,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 89 transitions, 416 flow [2022-11-25 17:41:55,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:41:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:41:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 751 transitions. [2022-11-25 17:41:55,777 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4980106100795756 [2022-11-25 17:41:55,778 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 751 transitions. [2022-11-25 17:41:55,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 751 transitions. [2022-11-25 17:41:55,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:55,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 751 transitions. [2022-11-25 17:41:55,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.75) internal successors, (751), 4 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:55,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:55,788 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 377.0) internal successors, (1885), 5 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:55,788 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 133 flow. Second operand 4 states and 751 transitions. [2022-11-25 17:41:55,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 89 transitions, 416 flow [2022-11-25 17:41:55,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 89 transitions, 416 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:41:55,793 INFO L231 Difference]: Finished difference. Result has 48 places, 50 transitions, 193 flow [2022-11-25 17:41:55,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=48, PETRI_TRANSITIONS=50} [2022-11-25 17:41:55,795 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2022-11-25 17:41:55,795 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 50 transitions, 193 flow [2022-11-25 17:41:55,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.5) internal successors, (698), 4 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:55,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:55,797 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:55,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:41:55,798 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:41:55,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:55,803 INFO L85 PathProgramCache]: Analyzing trace with hash -474596289, now seen corresponding path program 1 times [2022-11-25 17:41:55,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:55,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255431670] [2022-11-25 17:41:55,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:55,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:56,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255431670] [2022-11-25 17:41:56,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255431670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:41:56,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:41:56,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:41:56,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933406787] [2022-11-25 17:41:56,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:41:56,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:41:56,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:56,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:41:56,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:41:56,103 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 377 [2022-11-25 17:41:56,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 50 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 169.6) internal successors, (848), 5 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:56,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:56,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 377 [2022-11-25 17:41:56,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:57,158 INFO L130 PetriNetUnfolder]: 3817/5661 cut-off events. [2022-11-25 17:41:57,158 INFO L131 PetriNetUnfolder]: For 4354/4354 co-relation queries the response was YES. [2022-11-25 17:41:57,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14380 conditions, 5661 events. 3817/5661 cut-off events. For 4354/4354 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28847 event pairs, 2160 based on Foata normal form. 186/4861 useless extension candidates. Maximal degree in co-relation 8352. Up to 3221 conditions per place. [2022-11-25 17:41:57,195 INFO L137 encePairwiseOnDemand]: 372/377 looper letters, 90 selfloop transitions, 5 changer transitions 0/104 dead transitions. [2022-11-25 17:41:57,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 104 transitions, 574 flow [2022-11-25 17:41:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:41:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:41:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 903 transitions. [2022-11-25 17:41:57,202 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4790450928381963 [2022-11-25 17:41:57,203 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 903 transitions. [2022-11-25 17:41:57,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 903 transitions. [2022-11-25 17:41:57,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:57,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 903 transitions. [2022-11-25 17:41:57,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 180.6) internal successors, (903), 5 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:57,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:57,220 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:57,220 INFO L175 Difference]: Start difference. First operand has 48 places, 50 transitions, 193 flow. Second operand 5 states and 903 transitions. [2022-11-25 17:41:57,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 104 transitions, 574 flow [2022-11-25 17:41:57,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 104 transitions, 572 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 17:41:57,242 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 243 flow [2022-11-25 17:41:57,242 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=243, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2022-11-25 17:41:57,244 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2022-11-25 17:41:57,244 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 243 flow [2022-11-25 17:41:57,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.6) internal successors, (848), 5 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:57,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:57,246 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:57,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:41:57,247 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:41:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:57,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1821589644, now seen corresponding path program 1 times [2022-11-25 17:41:57,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:57,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559675181] [2022-11-25 17:41:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:57,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:57,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:57,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559675181] [2022-11-25 17:41:57,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559675181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:41:57,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819416089] [2022-11-25 17:41:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:57,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:57,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:57,495 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:41:57,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:41:57,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:57,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:41:57,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:41:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:57,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:41:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:57,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819416089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:41:57,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:41:57,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 17:41:57,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294453140] [2022-11-25 17:41:57,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:41:57,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:41:57,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:57,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:41:57,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:41:58,077 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 377 [2022-11-25 17:41:58,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 243 flow. Second operand has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:58,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:58,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 377 [2022-11-25 17:41:58,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:59,973 INFO L130 PetriNetUnfolder]: 5288/7790 cut-off events. [2022-11-25 17:41:59,974 INFO L131 PetriNetUnfolder]: For 8732/8732 co-relation queries the response was YES. [2022-11-25 17:41:59,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20360 conditions, 7790 events. 5288/7790 cut-off events. For 8732/8732 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 41908 event pairs, 2005 based on Foata normal form. 186/6607 useless extension candidates. Maximal degree in co-relation 14668. Up to 2043 conditions per place. [2022-11-25 17:42:00,043 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 165 selfloop transitions, 10 changer transitions 0/184 dead transitions. [2022-11-25 17:42:00,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 184 transitions, 1068 flow [2022-11-25 17:42:00,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:42:00,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 17:42:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1611 transitions. [2022-11-25 17:42:00,050 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47480106100795755 [2022-11-25 17:42:00,050 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1611 transitions. [2022-11-25 17:42:00,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1611 transitions. [2022-11-25 17:42:00,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:00,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1611 transitions. [2022-11-25 17:42:00,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:00,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 377.0) internal successors, (3770), 10 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:00,068 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 377.0) internal successors, (3770), 10 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:00,068 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 243 flow. Second operand 9 states and 1611 transitions. [2022-11-25 17:42:00,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 184 transitions, 1068 flow [2022-11-25 17:42:00,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 184 transitions, 1064 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:42:00,100 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 316 flow [2022-11-25 17:42:00,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=316, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2022-11-25 17:42:00,103 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2022-11-25 17:42:00,103 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 316 flow [2022-11-25 17:42:00,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 166.0) internal successors, (1992), 12 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:00,105 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:00,105 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:00,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:42:00,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:00,312 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:42:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash -71431325, now seen corresponding path program 1 times [2022-11-25 17:42:00,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:00,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684368071] [2022-11-25 17:42:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:00,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:00,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:00,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684368071] [2022-11-25 17:42:00,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684368071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:42:00,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:42:00,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:42:00,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959653657] [2022-11-25 17:42:00,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:42:00,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:42:00,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:00,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:42:00,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:42:00,688 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 377 [2022-11-25 17:42:00,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:00,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:00,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 377 [2022-11-25 17:42:00,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:01,867 INFO L130 PetriNetUnfolder]: 4174/6378 cut-off events. [2022-11-25 17:42:01,867 INFO L131 PetriNetUnfolder]: For 9900/9900 co-relation queries the response was YES. [2022-11-25 17:42:01,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17815 conditions, 6378 events. 4174/6378 cut-off events. For 9900/9900 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 34133 event pairs, 2918 based on Foata normal form. 0/5337 useless extension candidates. Maximal degree in co-relation 12562. Up to 5314 conditions per place. [2022-11-25 17:42:01,919 INFO L137 encePairwiseOnDemand]: 371/377 looper letters, 45 selfloop transitions, 2 changer transitions 28/84 dead transitions. [2022-11-25 17:42:01,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 84 transitions, 543 flow [2022-11-25 17:42:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:42:01,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:42:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 885 transitions. [2022-11-25 17:42:01,924 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46949602122015915 [2022-11-25 17:42:01,924 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 885 transitions. [2022-11-25 17:42:01,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 885 transitions. [2022-11-25 17:42:01,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:01,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 885 transitions. [2022-11-25 17:42:01,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.0) internal successors, (885), 5 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:01,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:01,939 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 377.0) internal successors, (2262), 6 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:01,939 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 316 flow. Second operand 5 states and 885 transitions. [2022-11-25 17:42:01,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 84 transitions, 543 flow [2022-11-25 17:42:01,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 84 transitions, 527 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-25 17:42:01,956 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 280 flow [2022-11-25 17:42:01,957 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2022-11-25 17:42:01,960 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 24 predicate places. [2022-11-25 17:42:01,961 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 280 flow [2022-11-25 17:42:01,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 169.8) internal successors, (849), 5 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:01,964 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:01,964 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:01,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:42:01,965 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:42:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:01,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1662302879, now seen corresponding path program 2 times [2022-11-25 17:42:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:01,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464683125] [2022-11-25 17:42:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:01,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:02,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:02,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464683125] [2022-11-25 17:42:02,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464683125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:02,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93853745] [2022-11-25 17:42:02,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:42:02,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:02,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:02,296 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:02,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:42:02,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:42:02,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:42:02,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:42:02,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:02,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:02,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93853745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:02,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:42:02,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 17:42:02,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33436459] [2022-11-25 17:42:02,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:02,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:42:02,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:02,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:42:02,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:42:02,914 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 377 [2022-11-25 17:42:02,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 280 flow. Second operand has 12 states, 12 states have (on average 166.91666666666666) internal successors, (2003), 12 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:02,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:02,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 377 [2022-11-25 17:42:02,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:03,955 INFO L130 PetriNetUnfolder]: 3271/4896 cut-off events. [2022-11-25 17:42:03,955 INFO L131 PetriNetUnfolder]: For 7584/7584 co-relation queries the response was YES. [2022-11-25 17:42:03,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14526 conditions, 4896 events. 3271/4896 cut-off events. For 7584/7584 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 24156 event pairs, 2085 based on Foata normal form. 96/4801 useless extension candidates. Maximal degree in co-relation 14499. Up to 2273 conditions per place. [2022-11-25 17:42:03,991 INFO L137 encePairwiseOnDemand]: 370/377 looper letters, 84 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2022-11-25 17:42:03,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 100 transitions, 660 flow [2022-11-25 17:42:03,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:42:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:42:03,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1050 transitions. [2022-11-25 17:42:03,996 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46419098143236076 [2022-11-25 17:42:03,996 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1050 transitions. [2022-11-25 17:42:03,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1050 transitions. [2022-11-25 17:42:03,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:03,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1050 transitions. [2022-11-25 17:42:04,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:04,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:04,006 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:04,006 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 280 flow. Second operand 6 states and 1050 transitions. [2022-11-25 17:42:04,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 100 transitions, 660 flow [2022-11-25 17:42:04,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 632 flow, removed 12 selfloop flow, removed 5 redundant places. [2022-11-25 17:42:04,021 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 321 flow [2022-11-25 17:42:04,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=321, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2022-11-25 17:42:04,022 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 21 predicate places. [2022-11-25 17:42:04,022 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 321 flow [2022-11-25 17:42:04,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 166.91666666666666) internal successors, (2003), 12 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:04,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:04,024 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:04,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:42:04,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 17:42:04,230 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:42:04,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:04,231 INFO L85 PathProgramCache]: Analyzing trace with hash 482512208, now seen corresponding path program 1 times [2022-11-25 17:42:04,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:04,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374794563] [2022-11-25 17:42:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:04,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:04,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:04,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374794563] [2022-11-25 17:42:04,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374794563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:04,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480014521] [2022-11-25 17:42:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:04,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:04,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:04,590 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:04,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:42:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:04,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:42:04,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:04,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:04,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480014521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:04,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:42:04,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 17:42:04,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491231410] [2022-11-25 17:42:04,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:04,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:42:04,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:04,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:42:04,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:42:05,142 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 377 [2022-11-25 17:42:05,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 321 flow. Second operand has 12 states, 12 states have (on average 166.75) internal successors, (2001), 12 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:05,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:05,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 377 [2022-11-25 17:42:05,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:05,957 INFO L130 PetriNetUnfolder]: 2097/3266 cut-off events. [2022-11-25 17:42:05,957 INFO L131 PetriNetUnfolder]: For 5616/5616 co-relation queries the response was YES. [2022-11-25 17:42:05,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10276 conditions, 3266 events. 2097/3266 cut-off events. For 5616/5616 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15729 event pairs, 845 based on Foata normal form. 192/3332 useless extension candidates. Maximal degree in co-relation 8493. Up to 1337 conditions per place. [2022-11-25 17:42:05,981 INFO L137 encePairwiseOnDemand]: 369/377 looper letters, 63 selfloop transitions, 5 changer transitions 28/105 dead transitions. [2022-11-25 17:42:05,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 704 flow [2022-11-25 17:42:05,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:42:05,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 17:42:05,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1217 transitions. [2022-11-25 17:42:05,986 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46115953012504735 [2022-11-25 17:42:05,987 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1217 transitions. [2022-11-25 17:42:05,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1217 transitions. [2022-11-25 17:42:05,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:05,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1217 transitions. [2022-11-25 17:42:05,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.85714285714286) internal successors, (1217), 7 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:05,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 377.0) internal successors, (3016), 8 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:06,000 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 377.0) internal successors, (3016), 8 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:06,001 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 321 flow. Second operand 7 states and 1217 transitions. [2022-11-25 17:42:06,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 704 flow [2022-11-25 17:42:06,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 105 transitions, 691 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-25 17:42:06,016 INFO L231 Difference]: Finished difference. Result has 72 places, 56 transitions, 290 flow [2022-11-25 17:42:06,016 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=290, PETRI_PLACES=72, PETRI_TRANSITIONS=56} [2022-11-25 17:42:06,017 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 26 predicate places. [2022-11-25 17:42:06,017 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 56 transitions, 290 flow [2022-11-25 17:42:06,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 166.75) internal successors, (2001), 12 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:06,018 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:06,019 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:06,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 17:42:06,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:06,226 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:42:06,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:06,226 INFO L85 PathProgramCache]: Analyzing trace with hash -41500881, now seen corresponding path program 2 times [2022-11-25 17:42:06,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:06,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115856123] [2022-11-25 17:42:06,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:06,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:06,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:06,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115856123] [2022-11-25 17:42:06,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115856123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:06,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949002239] [2022-11-25 17:42:06,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:42:06,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:06,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:06,532 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:06,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:42:06,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:42:06,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:42:06,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:42:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:06,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:06,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949002239] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:06,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:42:06,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2022-11-25 17:42:06,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617064812] [2022-11-25 17:42:06,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:42:06,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:42:06,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:06,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:42:06,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:42:07,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 377 [2022-11-25 17:42:07,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 56 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 167.33333333333334) internal successors, (1004), 6 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:07,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:07,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 377 [2022-11-25 17:42:07,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:07,515 INFO L130 PetriNetUnfolder]: 1374/2028 cut-off events. [2022-11-25 17:42:07,515 INFO L131 PetriNetUnfolder]: For 3906/3906 co-relation queries the response was YES. [2022-11-25 17:42:07,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7202 conditions, 2028 events. 1374/2028 cut-off events. For 3906/3906 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8277 event pairs, 639 based on Foata normal form. 134/2087 useless extension candidates. Maximal degree in co-relation 7161. Up to 1438 conditions per place. [2022-11-25 17:42:07,533 INFO L137 encePairwiseOnDemand]: 372/377 looper letters, 61 selfloop transitions, 8 changer transitions 0/78 dead transitions. [2022-11-25 17:42:07,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 78 transitions, 523 flow [2022-11-25 17:42:07,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:42:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:42:07,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1031 transitions. [2022-11-25 17:42:07,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4557913351016799 [2022-11-25 17:42:07,539 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1031 transitions. [2022-11-25 17:42:07,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1031 transitions. [2022-11-25 17:42:07,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:07,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1031 transitions. [2022-11-25 17:42:07,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.83333333333334) internal successors, (1031), 6 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:07,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:07,550 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:07,550 INFO L175 Difference]: Start difference. First operand has 72 places, 56 transitions, 290 flow. Second operand 6 states and 1031 transitions. [2022-11-25 17:42:07,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 78 transitions, 523 flow [2022-11-25 17:42:07,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 463 flow, removed 18 selfloop flow, removed 9 redundant places. [2022-11-25 17:42:07,567 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 265 flow [2022-11-25 17:42:07,568 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2022-11-25 17:42:07,569 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 19 predicate places. [2022-11-25 17:42:07,569 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 265 flow [2022-11-25 17:42:07,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 167.33333333333334) internal successors, (1004), 6 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:07,570 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:07,570 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:07,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:42:07,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:07,777 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:42:07,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:07,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1822388633, now seen corresponding path program 1 times [2022-11-25 17:42:07,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:07,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130914072] [2022-11-25 17:42:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:07,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:09,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:09,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130914072] [2022-11-25 17:42:09,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130914072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:09,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708444161] [2022-11-25 17:42:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:09,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:09,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:09,687 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:09,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:42:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:09,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-25 17:42:09,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:10,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:42:10,167 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 16 treesize of output 18 [2022-11-25 17:42:10,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 17:42:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:10,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:10,439 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_369 (Array Int Int))) (= (+ c_~t_4~0 c_~s_2~0) (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork3_~#t3~0.base| v_ArrVal_369) c_~X_0~0.base) (+ c_~X_0~0.offset 4)))) is different from false [2022-11-25 17:42:10,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:42:10,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 34 [2022-11-25 17:42:10,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:42:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:10,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708444161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:10,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:42:10,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2022-11-25 17:42:10,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900849172] [2022-11-25 17:42:10,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:10,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:42:10,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:10,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:42:10,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=444, Unknown=1, NotChecked=42, Total=552 [2022-11-25 17:42:10,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 377 [2022-11-25 17:42:10,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 265 flow. Second operand has 24 states, 24 states have (on average 131.08333333333334) internal successors, (3146), 24 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:10,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:10,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 377 [2022-11-25 17:42:10,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:14,284 INFO L130 PetriNetUnfolder]: 4297/6125 cut-off events. [2022-11-25 17:42:14,284 INFO L131 PetriNetUnfolder]: For 9727/9727 co-relation queries the response was YES. [2022-11-25 17:42:14,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20627 conditions, 6125 events. 4297/6125 cut-off events. For 9727/9727 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 28413 event pairs, 666 based on Foata normal form. 2/5979 useless extension candidates. Maximal degree in co-relation 20591. Up to 2678 conditions per place. [2022-11-25 17:42:14,337 INFO L137 encePairwiseOnDemand]: 357/377 looper letters, 235 selfloop transitions, 94 changer transitions 4/338 dead transitions. [2022-11-25 17:42:14,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 338 transitions, 2137 flow [2022-11-25 17:42:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 17:42:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 17:42:14,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3625 transitions. [2022-11-25 17:42:14,351 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3698224852071006 [2022-11-25 17:42:14,352 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3625 transitions. [2022-11-25 17:42:14,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3625 transitions. [2022-11-25 17:42:14,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:14,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3625 transitions. [2022-11-25 17:42:14,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 139.42307692307693) internal successors, (3625), 26 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:14,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 377.0) internal successors, (10179), 27 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:14,406 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 377.0) internal successors, (10179), 27 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:14,407 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 265 flow. Second operand 26 states and 3625 transitions. [2022-11-25 17:42:14,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 338 transitions, 2137 flow [2022-11-25 17:42:14,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 338 transitions, 2041 flow, removed 16 selfloop flow, removed 5 redundant places. [2022-11-25 17:42:14,437 INFO L231 Difference]: Finished difference. Result has 100 places, 150 transitions, 1095 flow [2022-11-25 17:42:14,437 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1095, PETRI_PLACES=100, PETRI_TRANSITIONS=150} [2022-11-25 17:42:14,439 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 54 predicate places. [2022-11-25 17:42:14,439 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 150 transitions, 1095 flow [2022-11-25 17:42:14,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 131.08333333333334) internal successors, (3146), 24 states have internal predecessors, (3146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:14,441 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:14,441 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:14,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:42:14,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:14,648 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:42:14,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:14,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1343349823, now seen corresponding path program 2 times [2022-11-25 17:42:14,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:14,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292463438] [2022-11-25 17:42:14,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:14,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:15,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:15,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292463438] [2022-11-25 17:42:15,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292463438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:15,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244268639] [2022-11-25 17:42:15,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:42:15,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:15,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:15,911 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:15,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:42:16,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:42:16,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:42:16,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-25 17:42:16,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:16,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:42:16,323 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 16 treesize of output 18 [2022-11-25 17:42:16,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:42:16,421 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 16 treesize of output 18 [2022-11-25 17:42:16,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 17:42:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:16,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:16,607 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_427 (Array Int Int))) (= c_~s_6~0 (+ (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork3_~#t3~0.base| v_ArrVal_427) c_~X_0~0.base) (+ c_~X_0~0.offset 4 (* 4 c_~i_3~0))) c_~s_2~0))) is different from false [2022-11-25 17:42:18,778 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_427 (Array Int Int)) (v_ArrVal_426 (Array Int Int)) (|v_thread1Thread1of1ForFork3_~#t3~0.base_61| Int) (|v_thread1Thread1of1ForFork3_~#t2~0.base_67| Int)) (or (= (select (select (store (store |c_#memory_int| |v_thread1Thread1of1ForFork3_~#t2~0.base_67| v_ArrVal_426) |v_thread1Thread1of1ForFork3_~#t3~0.base_61| v_ArrVal_427) c_~X_0~0.base) (+ c_~X_0~0.offset 4)) c_~s_6~0) (not (< |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork3_~#t2~0.base_67|)) (not (< |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork3_~#t3~0.base_61|)))) is different from false [2022-11-25 17:42:18,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:42:18,829 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 104 treesize of output 72 [2022-11-25 17:42:18,837 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 62 treesize of output 54 [2022-11-25 17:42:18,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-25 17:42:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2022-11-25 17:42:19,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244268639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:19,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:42:19,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-25 17:42:19,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397988513] [2022-11-25 17:42:19,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:19,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:42:19,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:19,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:42:19,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=423, Unknown=6, NotChecked=86, Total=600 [2022-11-25 17:42:19,160 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 377 [2022-11-25 17:42:19,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 150 transitions, 1095 flow. Second operand has 25 states, 25 states have (on average 137.68) internal successors, (3442), 25 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:19,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:19,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 377 [2022-11-25 17:42:19,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:22,190 INFO L130 PetriNetUnfolder]: 6757/9570 cut-off events. [2022-11-25 17:42:22,191 INFO L131 PetriNetUnfolder]: For 51293/51329 co-relation queries the response was YES. [2022-11-25 17:42:22,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46143 conditions, 9570 events. 6757/9570 cut-off events. For 51293/51329 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 47690 event pairs, 1119 based on Foata normal form. 11/9350 useless extension candidates. Maximal degree in co-relation 46093. Up to 4556 conditions per place. [2022-11-25 17:42:22,280 INFO L137 encePairwiseOnDemand]: 366/377 looper letters, 274 selfloop transitions, 72 changer transitions 2/353 dead transitions. [2022-11-25 17:42:22,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 353 transitions, 3107 flow [2022-11-25 17:42:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:42:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 17:42:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1660 transitions. [2022-11-25 17:42:22,288 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4002893658066072 [2022-11-25 17:42:22,289 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1660 transitions. [2022-11-25 17:42:22,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1660 transitions. [2022-11-25 17:42:22,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:22,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1660 transitions. [2022-11-25 17:42:22,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 150.9090909090909) internal successors, (1660), 11 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:22,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 377.0) internal successors, (4524), 12 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:22,302 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 377.0) internal successors, (4524), 12 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:22,303 INFO L175 Difference]: Start difference. First operand has 100 places, 150 transitions, 1095 flow. Second operand 11 states and 1660 transitions. [2022-11-25 17:42:22,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 353 transitions, 3107 flow [2022-11-25 17:42:22,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 353 transitions, 3005 flow, removed 43 selfloop flow, removed 3 redundant places. [2022-11-25 17:42:22,866 INFO L231 Difference]: Finished difference. Result has 113 places, 185 transitions, 1615 flow [2022-11-25 17:42:22,867 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1615, PETRI_PLACES=113, PETRI_TRANSITIONS=185} [2022-11-25 17:42:22,867 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 67 predicate places. [2022-11-25 17:42:22,868 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 185 transitions, 1615 flow [2022-11-25 17:42:22,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 137.68) internal successors, (3442), 25 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:22,869 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:22,869 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:22,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:42:23,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:42:23,081 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:42:23,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:23,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2113567775, now seen corresponding path program 3 times [2022-11-25 17:42:23,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:23,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577731139] [2022-11-25 17:42:23,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:23,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:24,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:24,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577731139] [2022-11-25 17:42:24,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577731139] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:24,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29623303] [2022-11-25 17:42:24,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:42:24,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:24,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:24,267 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:24,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:42:24,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:42:24,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:42:24,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-25 17:42:24,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:24,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:42:24,737 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 16 treesize of output 18 [2022-11-25 17:42:24,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 17:42:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:24,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:24,995 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_484 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork3_~#t3~0.base| v_ArrVal_484) c_~X_0~0.base) (+ c_~X_0~0.offset 4)) c_~s_2~0)) is different from false [2022-11-25 17:42:25,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:42:25,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 34 [2022-11-25 17:42:25,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:42:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2022-11-25 17:42:25,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29623303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:25,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:42:25,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-11-25 17:42:25,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174748482] [2022-11-25 17:42:25,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:25,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:42:25,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:25,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:42:25,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=399, Unknown=3, NotChecked=40, Total=506 [2022-11-25 17:42:25,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 377 [2022-11-25 17:42:25,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 185 transitions, 1615 flow. Second operand has 23 states, 23 states have (on average 140.30434782608697) internal successors, (3227), 23 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:25,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:25,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 377 [2022-11-25 17:42:25,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:29,854 INFO L130 PetriNetUnfolder]: 8359/11881 cut-off events. [2022-11-25 17:42:29,855 INFO L131 PetriNetUnfolder]: For 80604/80640 co-relation queries the response was YES. [2022-11-25 17:42:29,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61058 conditions, 11881 events. 8359/11881 cut-off events. For 80604/80640 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 61503 event pairs, 1134 based on Foata normal form. 31/11580 useless extension candidates. Maximal degree in co-relation 61002. Up to 5655 conditions per place. [2022-11-25 17:42:29,981 INFO L137 encePairwiseOnDemand]: 366/377 looper letters, 247 selfloop transitions, 119 changer transitions 2/373 dead transitions. [2022-11-25 17:42:29,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 373 transitions, 3825 flow [2022-11-25 17:42:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:42:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:42:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2835 transitions. [2022-11-25 17:42:29,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3957838894318023 [2022-11-25 17:42:29,995 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2835 transitions. [2022-11-25 17:42:29,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2835 transitions. [2022-11-25 17:42:29,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:29,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2835 transitions. [2022-11-25 17:42:30,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 149.21052631578948) internal successors, (2835), 19 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:30,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 377.0) internal successors, (7540), 20 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:30,023 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 377.0) internal successors, (7540), 20 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:30,024 INFO L175 Difference]: Start difference. First operand has 113 places, 185 transitions, 1615 flow. Second operand 19 states and 2835 transitions. [2022-11-25 17:42:30,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 373 transitions, 3825 flow [2022-11-25 17:42:31,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 373 transitions, 3500 flow, removed 138 selfloop flow, removed 3 redundant places. [2022-11-25 17:42:31,466 INFO L231 Difference]: Finished difference. Result has 136 places, 213 transitions, 2138 flow [2022-11-25 17:42:31,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2138, PETRI_PLACES=136, PETRI_TRANSITIONS=213} [2022-11-25 17:42:31,467 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 90 predicate places. [2022-11-25 17:42:31,467 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 213 transitions, 2138 flow [2022-11-25 17:42:31,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 140.30434782608697) internal successors, (3227), 23 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:31,469 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:31,470 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:31,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 17:42:31,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:31,677 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:42:31,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:31,679 INFO L85 PathProgramCache]: Analyzing trace with hash -501730692, now seen corresponding path program 1 times [2022-11-25 17:42:31,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:31,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575297847] [2022-11-25 17:42:31,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:31,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:31,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:32,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:32,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575297847] [2022-11-25 17:42:32,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575297847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:32,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282391177] [2022-11-25 17:42:32,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:32,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:32,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:32,519 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:32,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:42:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:32,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 17:42:32,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:32,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 17:42:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:32,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:33,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:42:33,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2022-11-25 17:42:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:33,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282391177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:33,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:42:33,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-11-25 17:42:33,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293569447] [2022-11-25 17:42:33,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:33,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:42:33,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:33,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:42:33,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:42:33,715 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 377 [2022-11-25 17:42:33,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 213 transitions, 2138 flow. Second operand has 15 states, 15 states have (on average 157.8) internal successors, (2367), 15 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:33,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:33,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 377 [2022-11-25 17:42:33,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:38,470 INFO L130 PetriNetUnfolder]: 9486/13717 cut-off events. [2022-11-25 17:42:38,470 INFO L131 PetriNetUnfolder]: For 107488/107566 co-relation queries the response was YES. [2022-11-25 17:42:38,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74645 conditions, 13717 events. 9486/13717 cut-off events. For 107488/107566 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 75658 event pairs, 2879 based on Foata normal form. 44/13345 useless extension candidates. Maximal degree in co-relation 74580. Up to 10657 conditions per place. [2022-11-25 17:42:38,588 INFO L137 encePairwiseOnDemand]: 367/377 looper letters, 318 selfloop transitions, 61 changer transitions 1/386 dead transitions. [2022-11-25 17:42:38,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 386 transitions, 4379 flow [2022-11-25 17:42:38,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:42:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:42:38,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2657 transitions. [2022-11-25 17:42:38,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4404840848806366 [2022-11-25 17:42:38,597 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2657 transitions. [2022-11-25 17:42:38,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2657 transitions. [2022-11-25 17:42:38,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:38,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2657 transitions. [2022-11-25 17:42:38,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 166.0625) internal successors, (2657), 16 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:38,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 377.0) internal successors, (6409), 17 states have internal predecessors, (6409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:38,621 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 377.0) internal successors, (6409), 17 states have internal predecessors, (6409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:38,621 INFO L175 Difference]: Start difference. First operand has 136 places, 213 transitions, 2138 flow. Second operand 16 states and 2657 transitions. [2022-11-25 17:42:38,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 386 transitions, 4379 flow [2022-11-25 17:42:39,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 386 transitions, 4218 flow, removed 47 selfloop flow, removed 7 redundant places. [2022-11-25 17:42:39,722 INFO L231 Difference]: Finished difference. Result has 152 places, 260 transitions, 2838 flow [2022-11-25 17:42:39,722 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2838, PETRI_PLACES=152, PETRI_TRANSITIONS=260} [2022-11-25 17:42:39,723 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 106 predicate places. [2022-11-25 17:42:39,723 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 260 transitions, 2838 flow [2022-11-25 17:42:39,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 157.8) internal successors, (2367), 15 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:39,724 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:39,724 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:39,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 17:42:39,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:39,931 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:42:39,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:39,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1082883591, now seen corresponding path program 4 times [2022-11-25 17:42:39,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:39,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836134836] [2022-11-25 17:42:39,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:39,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:41,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:41,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836134836] [2022-11-25 17:42:41,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836134836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:41,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757211636] [2022-11-25 17:42:41,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:42:41,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:41,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:41,828 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:41,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:42:42,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:42:42,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:42:42,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 17:42:42,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:42,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 17:42:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:42,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:42,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:42:42,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2022-11-25 17:42:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:42,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757211636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:42,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:42:42,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 6] total 21 [2022-11-25 17:42:42,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825504935] [2022-11-25 17:42:42,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:42,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:42:42,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:42,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:42:42,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:42:44,320 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 377 [2022-11-25 17:42:44,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 260 transitions, 2838 flow. Second operand has 22 states, 22 states have (on average 146.6818181818182) internal successors, (3227), 22 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:44,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:44,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 377 [2022-11-25 17:42:44,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:49,874 INFO L130 PetriNetUnfolder]: 11835/17052 cut-off events. [2022-11-25 17:42:49,874 INFO L131 PetriNetUnfolder]: For 170437/170493 co-relation queries the response was YES. [2022-11-25 17:42:50,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98591 conditions, 17052 events. 11835/17052 cut-off events. For 170437/170493 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 96865 event pairs, 4011 based on Foata normal form. 30/16582 useless extension candidates. Maximal degree in co-relation 98517. Up to 12999 conditions per place. [2022-11-25 17:42:50,119 INFO L137 encePairwiseOnDemand]: 366/377 looper letters, 322 selfloop transitions, 109 changer transitions 1/438 dead transitions. [2022-11-25 17:42:50,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 438 transitions, 5379 flow [2022-11-25 17:42:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:42:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:42:50,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2467 transitions. [2022-11-25 17:42:50,126 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40898541114058357 [2022-11-25 17:42:50,126 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2467 transitions. [2022-11-25 17:42:50,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2467 transitions. [2022-11-25 17:42:50,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:50,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2467 transitions. [2022-11-25 17:42:50,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 154.1875) internal successors, (2467), 16 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:50,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 377.0) internal successors, (6409), 17 states have internal predecessors, (6409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:50,146 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 377.0) internal successors, (6409), 17 states have internal predecessors, (6409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:50,146 INFO L175 Difference]: Start difference. First operand has 152 places, 260 transitions, 2838 flow. Second operand 16 states and 2467 transitions. [2022-11-25 17:42:50,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 438 transitions, 5379 flow [2022-11-25 17:42:52,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 438 transitions, 4996 flow, removed 155 selfloop flow, removed 4 redundant places. [2022-11-25 17:42:52,166 INFO L231 Difference]: Finished difference. Result has 171 places, 330 transitions, 3835 flow [2022-11-25 17:42:52,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3835, PETRI_PLACES=171, PETRI_TRANSITIONS=330} [2022-11-25 17:42:52,168 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 125 predicate places. [2022-11-25 17:42:52,168 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 330 transitions, 3835 flow [2022-11-25 17:42:52,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 146.6818181818182) internal successors, (3227), 22 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:52,169 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:52,170 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:52,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:42:52,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:42:52,379 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:42:52,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:52,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1440820585, now seen corresponding path program 5 times [2022-11-25 17:42:52,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:52,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890515739] [2022-11-25 17:42:52,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:52,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:53,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:53,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890515739] [2022-11-25 17:42:53,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890515739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:53,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625158070] [2022-11-25 17:42:53,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:42:53,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:53,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:53,618 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:53,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:42:53,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:42:53,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:42:53,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-25 17:42:53,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:54,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:42:54,066 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 16 treesize of output 18 [2022-11-25 17:42:54,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:42:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:54,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:54,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:42:54,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 34 [2022-11-25 17:42:54,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:42:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:42:54,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625158070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:54,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:42:54,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-11-25 17:42:54,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741497903] [2022-11-25 17:42:54,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:54,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:42:54,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:54,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:42:54,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=390, Unknown=3, NotChecked=0, Total=462 [2022-11-25 17:42:55,270 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 377 [2022-11-25 17:42:55,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 330 transitions, 3835 flow. Second operand has 22 states, 22 states have (on average 139.86363636363637) internal successors, (3077), 22 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:55,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:55,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 377 [2022-11-25 17:42:55,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:43:01,234 INFO L130 PetriNetUnfolder]: 13117/18640 cut-off events. [2022-11-25 17:43:01,234 INFO L131 PetriNetUnfolder]: For 186867/186895 co-relation queries the response was YES. [2022-11-25 17:43:01,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108806 conditions, 18640 events. 13117/18640 cut-off events. For 186867/186895 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 103986 event pairs, 4483 based on Foata normal form. 27/18145 useless extension candidates. Maximal degree in co-relation 108722. Up to 14976 conditions per place. [2022-11-25 17:43:01,432 INFO L137 encePairwiseOnDemand]: 366/377 looper letters, 337 selfloop transitions, 107 changer transitions 1/450 dead transitions. [2022-11-25 17:43:01,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 450 transitions, 5709 flow [2022-11-25 17:43:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:43:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:43:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2083 transitions. [2022-11-25 17:43:01,436 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3946570670708602 [2022-11-25 17:43:01,436 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2083 transitions. [2022-11-25 17:43:01,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2083 transitions. [2022-11-25 17:43:01,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:43:01,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2083 transitions. [2022-11-25 17:43:01,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 148.78571428571428) internal successors, (2083), 14 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:01,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 377.0) internal successors, (5655), 15 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:01,450 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 377.0) internal successors, (5655), 15 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:01,450 INFO L175 Difference]: Start difference. First operand has 171 places, 330 transitions, 3835 flow. Second operand 14 states and 2083 transitions. [2022-11-25 17:43:01,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 450 transitions, 5709 flow [2022-11-25 17:43:03,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 450 transitions, 5463 flow, removed 114 selfloop flow, removed 5 redundant places. [2022-11-25 17:43:03,804 INFO L231 Difference]: Finished difference. Result has 182 places, 344 transitions, 4117 flow [2022-11-25 17:43:03,804 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=3627, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4117, PETRI_PLACES=182, PETRI_TRANSITIONS=344} [2022-11-25 17:43:03,805 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 136 predicate places. [2022-11-25 17:43:03,805 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 344 transitions, 4117 flow [2022-11-25 17:43:03,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 139.86363636363637) internal successors, (3077), 22 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:03,806 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:43:03,806 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:03,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 17:43:04,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:04,015 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:43:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:04,016 INFO L85 PathProgramCache]: Analyzing trace with hash 44346230, now seen corresponding path program 2 times [2022-11-25 17:43:04,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:04,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370411357] [2022-11-25 17:43:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:04,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:43:04,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:04,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370411357] [2022-11-25 17:43:04,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370411357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:43:04,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299458148] [2022-11-25 17:43:04,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:43:04,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:04,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:43:04,970 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:43:05,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:43:05,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:43:05,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:43:05,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 17:43:05,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:43:05,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 17:43:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:43:05,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:43:05,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:43:05,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2022-11-25 17:43:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:43:05,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299458148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:43:05,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:43:05,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 16 [2022-11-25 17:43:05,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616893556] [2022-11-25 17:43:05,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:43:05,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:43:05,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:05,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:43:05,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:43:06,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 377 [2022-11-25 17:43:06,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 344 transitions, 4117 flow. Second operand has 17 states, 17 states have (on average 155.52941176470588) internal successors, (2644), 17 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:06,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:43:06,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 377 [2022-11-25 17:43:06,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:43:11,785 INFO L130 PetriNetUnfolder]: 12654/18267 cut-off events. [2022-11-25 17:43:11,785 INFO L131 PetriNetUnfolder]: For 181525/181573 co-relation queries the response was YES. [2022-11-25 17:43:11,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107210 conditions, 18267 events. 12654/18267 cut-off events. For 181525/181573 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 105680 event pairs, 4597 based on Foata normal form. 27/17740 useless extension candidates. Maximal degree in co-relation 107124. Up to 16218 conditions per place. [2022-11-25 17:43:11,990 INFO L137 encePairwiseOnDemand]: 366/377 looper letters, 383 selfloop transitions, 55 changer transitions 1/445 dead transitions. [2022-11-25 17:43:11,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 445 transitions, 5763 flow [2022-11-25 17:43:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:43:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:43:11,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2433 transitions. [2022-11-25 17:43:11,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43023872679045094 [2022-11-25 17:43:11,995 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2433 transitions. [2022-11-25 17:43:11,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2433 transitions. [2022-11-25 17:43:11,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:43:11,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2433 transitions. [2022-11-25 17:43:12,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 162.2) internal successors, (2433), 15 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:12,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 377.0) internal successors, (6032), 16 states have internal predecessors, (6032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:12,008 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 377.0) internal successors, (6032), 16 states have internal predecessors, (6032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:12,008 INFO L175 Difference]: Start difference. First operand has 182 places, 344 transitions, 4117 flow. Second operand 15 states and 2433 transitions. [2022-11-25 17:43:12,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 445 transitions, 5763 flow [2022-11-25 17:43:13,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 445 transitions, 5616 flow, removed 31 selfloop flow, removed 7 redundant places. [2022-11-25 17:43:13,658 INFO L231 Difference]: Finished difference. Result has 191 places, 354 transitions, 4248 flow [2022-11-25 17:43:13,658 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=3970, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4248, PETRI_PLACES=191, PETRI_TRANSITIONS=354} [2022-11-25 17:43:13,659 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 145 predicate places. [2022-11-25 17:43:13,659 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 354 transitions, 4248 flow [2022-11-25 17:43:13,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 155.52941176470588) internal successors, (2644), 17 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:13,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:43:13,660 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:13,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:43:13,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:43:13,861 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:43:13,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:13,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1461545757, now seen corresponding path program 6 times [2022-11-25 17:43:13,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:13,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65119899] [2022-11-25 17:43:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:13,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:43:14,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:14,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65119899] [2022-11-25 17:43:14,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65119899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:43:14,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908384982] [2022-11-25 17:43:14,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:43:14,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:14,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:43:14,580 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:43:14,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:43:15,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 17:43:15,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:43:15,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 17:43:15,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:43:15,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 17:43:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:43:15,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:43:15,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:43:15,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2022-11-25 17:43:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:43:15,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908384982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:43:15,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:43:15,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-11-25 17:43:15,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382193565] [2022-11-25 17:43:15,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:43:15,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:43:15,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:15,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:43:15,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:43:15,778 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 377 [2022-11-25 17:43:15,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 354 transitions, 4248 flow. Second operand has 15 states, 15 states have (on average 157.73333333333332) internal successors, (2366), 15 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:15,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:43:15,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 377 [2022-11-25 17:43:15,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:43:21,670 INFO L130 PetriNetUnfolder]: 13762/19818 cut-off events. [2022-11-25 17:43:21,670 INFO L131 PetriNetUnfolder]: For 202251/202311 co-relation queries the response was YES. [2022-11-25 17:43:21,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117622 conditions, 19818 events. 13762/19818 cut-off events. For 202251/202311 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 115551 event pairs, 4927 based on Foata normal form. 29/19245 useless extension candidates. Maximal degree in co-relation 117533. Up to 16555 conditions per place. [2022-11-25 17:43:21,923 INFO L137 encePairwiseOnDemand]: 366/377 looper letters, 371 selfloop transitions, 87 changer transitions 1/465 dead transitions. [2022-11-25 17:43:21,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 465 transitions, 6157 flow [2022-11-25 17:43:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:43:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:43:21,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2465 transitions. [2022-11-25 17:43:21,928 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2022-11-25 17:43:21,928 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2465 transitions. [2022-11-25 17:43:21,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2465 transitions. [2022-11-25 17:43:21,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:43:21,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2465 transitions. [2022-11-25 17:43:21,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 164.33333333333334) internal successors, (2465), 15 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:21,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 377.0) internal successors, (6032), 16 states have internal predecessors, (6032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:21,938 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 377.0) internal successors, (6032), 16 states have internal predecessors, (6032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:21,938 INFO L175 Difference]: Start difference. First operand has 191 places, 354 transitions, 4248 flow. Second operand 15 states and 2465 transitions. [2022-11-25 17:43:21,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 465 transitions, 6157 flow [2022-11-25 17:43:23,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 465 transitions, 6032 flow, removed 34 selfloop flow, removed 9 redundant places. [2022-11-25 17:43:23,899 INFO L231 Difference]: Finished difference. Result has 202 places, 373 transitions, 4723 flow [2022-11-25 17:43:23,900 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=4123, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4723, PETRI_PLACES=202, PETRI_TRANSITIONS=373} [2022-11-25 17:43:23,900 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 156 predicate places. [2022-11-25 17:43:23,900 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 373 transitions, 4723 flow [2022-11-25 17:43:23,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 157.73333333333332) internal successors, (2366), 15 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:23,901 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:43:23,901 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:23,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:43:24,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:43:24,102 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:43:24,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:24,102 INFO L85 PathProgramCache]: Analyzing trace with hash 907095258, now seen corresponding path program 1 times [2022-11-25 17:43:24,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:24,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605723622] [2022-11-25 17:43:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:24,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:43:25,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:25,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605723622] [2022-11-25 17:43:25,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605723622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:43:25,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769110115] [2022-11-25 17:43:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:25,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:25,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:43:25,293 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:43:25,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:43:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:25,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-25 17:43:25,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:43:25,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:43:25,753 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 16 treesize of output 18 [2022-11-25 17:43:25,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 17:43:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:43:25,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:43:26,078 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_822 (Array Int Int))) (= (+ c_~t_4~0 c_~s_2~0) (select (select (store |c_#memory_int| |c_thread1Thread1of1ForFork3_~#t3~0.base| v_ArrVal_822) c_~X_0~0.base) (+ c_~X_0~0.offset 4)))) is different from false [2022-11-25 17:43:26,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:43:26,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 34 [2022-11-25 17:43:26,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 17:43:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:43:26,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769110115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:43:26,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:43:26,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-11-25 17:43:26,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603198723] [2022-11-25 17:43:26,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:43:26,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:43:26,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:26,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:43:26,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=322, Unknown=1, NotChecked=36, Total=420 [2022-11-25 17:43:26,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 377 [2022-11-25 17:43:26,382 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 373 transitions, 4723 flow. Second operand has 21 states, 21 states have (on average 140.14285714285714) internal successors, (2943), 21 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:26,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:43:26,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 377 [2022-11-25 17:43:26,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:43:34,128 INFO L130 PetriNetUnfolder]: 15196/21580 cut-off events. [2022-11-25 17:43:34,128 INFO L131 PetriNetUnfolder]: For 255473/255501 co-relation queries the response was YES. [2022-11-25 17:43:34,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132900 conditions, 21580 events. 15196/21580 cut-off events. For 255473/255501 co-relation queries the response was YES. Maximal size of possible extension queue 920. Compared 123429 event pairs, 5118 based on Foata normal form. 27/20997 useless extension candidates. Maximal degree in co-relation 132805. Up to 17586 conditions per place. [2022-11-25 17:43:34,442 INFO L137 encePairwiseOnDemand]: 358/377 looper letters, 349 selfloop transitions, 141 changer transitions 1/496 dead transitions. [2022-11-25 17:43:34,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 496 transitions, 6901 flow [2022-11-25 17:43:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:43:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 17:43:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2363 transitions. [2022-11-25 17:43:34,448 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3917440318302387 [2022-11-25 17:43:34,448 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2363 transitions. [2022-11-25 17:43:34,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2363 transitions. [2022-11-25 17:43:34,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:43:34,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2363 transitions. [2022-11-25 17:43:34,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 147.6875) internal successors, (2363), 16 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:34,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 377.0) internal successors, (6409), 17 states have internal predecessors, (6409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:34,463 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 377.0) internal successors, (6409), 17 states have internal predecessors, (6409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:34,464 INFO L175 Difference]: Start difference. First operand has 202 places, 373 transitions, 4723 flow. Second operand 16 states and 2363 transitions. [2022-11-25 17:43:34,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 496 transitions, 6901 flow [2022-11-25 17:43:37,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 496 transitions, 6667 flow, removed 69 selfloop flow, removed 6 redundant places. [2022-11-25 17:43:37,164 INFO L231 Difference]: Finished difference. Result has 216 places, 409 transitions, 5439 flow [2022-11-25 17:43:37,164 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=4517, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5439, PETRI_PLACES=216, PETRI_TRANSITIONS=409} [2022-11-25 17:43:37,165 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 170 predicate places. [2022-11-25 17:43:37,165 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 409 transitions, 5439 flow [2022-11-25 17:43:37,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 140.14285714285714) internal successors, (2943), 21 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:37,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:43:37,166 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:37,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-25 17:43:37,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:43:37,367 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-25 17:43:37,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:37,368 INFO L85 PathProgramCache]: Analyzing trace with hash 908770337, now seen corresponding path program 1 times [2022-11-25 17:43:37,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:37,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390562581] [2022-11-25 17:43:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:37,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:43:38,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:38,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390562581] [2022-11-25 17:43:38,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390562581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:43:38,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969811711] [2022-11-25 17:43:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:38,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:38,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:43:38,456 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:43:38,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f10161bd-0f0f-47ff-b885-cb11632257c9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:43:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:38,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 17:43:38,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:43:38,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 17:43:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:43:38,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:43:39,042 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:43:39,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2022-11-25 17:43:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:43:39,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969811711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:43:39,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:43:39,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-11-25 17:43:39,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978104868] [2022-11-25 17:43:39,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:43:39,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:43:39,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:39,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:43:39,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:43:39,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 377 [2022-11-25 17:43:39,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 409 transitions, 5439 flow. Second operand has 15 states, 15 states have (on average 157.93333333333334) internal successors, (2369), 15 states have internal predecessors, (2369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:39,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:43:39,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 377 [2022-11-25 17:43:39,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:43:46,325 INFO L130 PetriNetUnfolder]: 14547/21034 cut-off events. [2022-11-25 17:43:46,325 INFO L131 PetriNetUnfolder]: For 281657/281727 co-relation queries the response was YES. [2022-11-25 17:43:46,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137375 conditions, 21034 events. 14547/21034 cut-off events. For 281657/281727 co-relation queries the response was YES. Maximal size of possible extension queue 930. Compared 124562 event pairs, 5368 based on Foata normal form. 48/20438 useless extension candidates. Maximal degree in co-relation 137275. Up to 18858 conditions per place. [2022-11-25 17:43:46,724 INFO L137 encePairwiseOnDemand]: 367/377 looper letters, 434 selfloop transitions, 56 changer transitions 1/497 dead transitions. [2022-11-25 17:43:46,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 497 transitions, 7261 flow [2022-11-25 17:43:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:43:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:43:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2298 transitions. [2022-11-25 17:43:46,730 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43539219401288365 [2022-11-25 17:43:46,730 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2298 transitions. [2022-11-25 17:43:46,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2298 transitions. [2022-11-25 17:43:46,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:43:46,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2298 transitions. [2022-11-25 17:43:46,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 164.14285714285714) internal successors, (2298), 14 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:46,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 377.0) internal successors, (5655), 15 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:46,740 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 377.0) internal successors, (5655), 15 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:46,740 INFO L175 Difference]: Start difference. First operand has 216 places, 409 transitions, 5439 flow. Second operand 14 states and 2298 transitions. [2022-11-25 17:43:46,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 497 transitions, 7261 flow