./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 11:27:34,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:27:34,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:27:34,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:27:34,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:27:34,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:27:34,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:27:34,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:27:34,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:27:34,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:27:34,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:27:34,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:27:34,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:27:34,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:27:34,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:27:34,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:27:34,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:27:34,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:27:34,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:27:34,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:27:34,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:27:34,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:27:34,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:27:34,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:27:34,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:27:34,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:27:34,270 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:27:34,271 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:27:34,272 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:27:34,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:27:34,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:27:34,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:27:34,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:27:34,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:27:34,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:27:34,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:27:34,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:27:34,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:27:34,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:27:34,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:27:34,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:27:34,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 11:27:34,308 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:27:34,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:27:34,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:27:34,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:27:34,313 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:27:34,313 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:27:34,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:27:34,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:27:34,314 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:27:34,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:27:34,314 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:27:34,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:27:34,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:27:34,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:27:34,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:27:34,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:27:34,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:27:34,315 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:27:34,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:27:34,315 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:27:34,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:27:34,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:27:34,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:27:34,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:27:34,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:27:34,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:27:34,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:27:34,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:27:34,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:27:34,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:27:34,317 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:27:34,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:27:34,317 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:27:34,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:27:34,317 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:27:34,317 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_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 [2022-12-13 11:27:34,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:27:34,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:27:34,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:27:34,512 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:27:34,512 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:27:34,513 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-12-13 11:27:37,171 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:27:37,327 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:27:37,328 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-12-13 11:27:37,332 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/data/3251dfd86/e9e67bdaf7c74d19ae23006137669b9a/FLAGf23cb2fcb [2022-12-13 11:27:37,342 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/data/3251dfd86/e9e67bdaf7c74d19ae23006137669b9a [2022-12-13 11:27:37,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:27:37,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:27:37,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:27:37,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:27:37,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:27:37,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:27:37" (1/1) ... [2022-12-13 11:27:37,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d463b28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:27:37, skipping insertion in model container [2022-12-13 11:27:37,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:27:37" (1/1) ... [2022-12-13 11:27:37,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:27:37,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:27:37,491 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:27:37,493 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:27:37,496 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:27:37,497 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:27:37,499 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:27:37,500 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:27:37,506 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_29d4843b-b53c-4276-a448-2291c8c7181d/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-12-13 11:27:37,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:27:37,523 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:27:37,535 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:27:37,536 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:27:37,537 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:27:37,538 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:27:37,539 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:27:37,540 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:27:37,544 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_29d4843b-b53c-4276-a448-2291c8c7181d/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-12-13 11:27:37,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:27:37,559 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:27:37,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:27:37 WrapperNode [2022-12-13 11:27:37,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:27:37,560 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:27:37,561 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:27:37,561 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:27:37,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:27:37" (1/1) ... [2022-12-13 11:27:37,574 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:27:37" (1/1) ... [2022-12-13 11:27:37,591 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 101 [2022-12-13 11:27:37,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:27:37,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:27:37,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:27:37,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:27:37,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:27:37" (1/1) ... [2022-12-13 11:27:37,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:27:37" (1/1) ... [2022-12-13 11:27:37,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:27:37" (1/1) ... [2022-12-13 11:27:37,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:27:37" (1/1) ... [2022-12-13 11:27:37,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:27:37" (1/1) ... [2022-12-13 11:27:37,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:27:37" (1/1) ... [2022-12-13 11:27:37,614 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:27:37" (1/1) ... [2022-12-13 11:27:37,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:27:37" (1/1) ... [2022-12-13 11:27:37,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:27:37,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:27:37,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:27:37,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:27:37,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:27:37" (1/1) ... [2022-12-13 11:27:37,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:27:37,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:27:37,644 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:27:37,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:27:37,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:27:37,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 11:27:37,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 11:27:37,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 11:27:37,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 11:27:37,679 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 11:27:37,679 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 11:27:37,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:27:37,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:27:37,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:27:37,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 11:27:37,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 11:27:37,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 11:27:37,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:27:37,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:27:37,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:27:37,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:27:37,681 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 11:27:37,769 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:27:37,771 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:27:37,979 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:27:38,022 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:27:38,022 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 11:27:38,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:27:38 BoogieIcfgContainer [2022-12-13 11:27:38,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:27:38,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:27:38,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:27:38,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:27:38,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:27:37" (1/3) ... [2022-12-13 11:27:38,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7323d0e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:27:38, skipping insertion in model container [2022-12-13 11:27:38,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:27:37" (2/3) ... [2022-12-13 11:27:38,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7323d0e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:27:38, skipping insertion in model container [2022-12-13 11:27:38,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:27:38" (3/3) ... [2022-12-13 11:27:38,032 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2022-12-13 11:27:38,038 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 11:27:38,047 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:27:38,047 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 11:27:38,047 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:27:38,102 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 11:27:38,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 153 transitions, 330 flow [2022-12-13 11:27:38,213 INFO L130 PetriNetUnfolder]: 12/150 cut-off events. [2022-12-13 11:27:38,213 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:27:38,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 150 events. 12/150 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 90 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2022-12-13 11:27:38,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 153 transitions, 330 flow [2022-12-13 11:27:38,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 139 transitions, 296 flow [2022-12-13 11:27:38,233 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:27:38,241 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 139 transitions, 296 flow [2022-12-13 11:27:38,243 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 139 transitions, 296 flow [2022-12-13 11:27:38,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 139 transitions, 296 flow [2022-12-13 11:27:38,290 INFO L130 PetriNetUnfolder]: 12/139 cut-off events. [2022-12-13 11:27:38,290 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:27:38,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 12/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2022-12-13 11:27:38,292 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2022-12-13 11:27:42,635 INFO L134 LiptonReduction]: Checked pairs total: 1510 [2022-12-13 11:27:42,635 INFO L136 LiptonReduction]: Total number of compositions: 135 [2022-12-13 11:27:42,649 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:27:42,656 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;@6d3f55a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:27:42,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 11:27:42,663 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2022-12-13 11:27:42,663 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 11:27:42,664 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:27:42,664 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:27:42,665 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:27:42,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:27:42,668 INFO L85 PathProgramCache]: Analyzing trace with hash 316931394, now seen corresponding path program 1 times [2022-12-13 11:27:42,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:27:42,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262125946] [2022-12-13 11:27:42,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:27:42,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:27:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:27:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:27:42,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:27:42,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262125946] [2022-12-13 11:27:42,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262125946] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:27:42,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:27:42,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:27:42,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220975447] [2022-12-13 11:27:42,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:27:42,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:27:42,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:27:43,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:27:43,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:27:43,012 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 288 [2022-12-13 11:27:43,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:43,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:27:43,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 288 [2022-12-13 11:27:43,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:27:43,126 INFO L130 PetriNetUnfolder]: 360/508 cut-off events. [2022-12-13 11:27:43,126 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-12-13 11:27:43,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1603 event pairs, 39 based on Foata normal form. 1/308 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2022-12-13 11:27:43,130 INFO L137 encePairwiseOnDemand]: 283/288 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2022-12-13 11:27:43,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2022-12-13 11:27:43,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:27:43,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:27:43,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 437 transitions. [2022-12-13 11:27:43,140 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5057870370370371 [2022-12-13 11:27:43,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 437 transitions. [2022-12-13 11:27:43,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 437 transitions. [2022-12-13 11:27:43,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:27:43,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 437 transitions. [2022-12-13 11:27:43,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:43,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:43,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:43,159 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 437 transitions. [2022-12-13 11:27:43,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 187 flow [2022-12-13 11:27:43,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 40 transitions, 165 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 11:27:43,164 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2022-12-13 11:27:43,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2022-12-13 11:27:43,169 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2022-12-13 11:27:43,170 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2022-12-13 11:27:43,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:43,170 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:27:43,170 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:27:43,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:27:43,171 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:27:43,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:27:43,172 INFO L85 PathProgramCache]: Analyzing trace with hash 580794839, now seen corresponding path program 1 times [2022-12-13 11:27:43,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:27:43,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663112648] [2022-12-13 11:27:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:27:43,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:27:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:27:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:27:43,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:27:43,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663112648] [2022-12-13 11:27:43,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663112648] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:27:43,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:27:43,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:27:43,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173953530] [2022-12-13 11:27:43,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:27:43,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:27:43,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:27:43,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:27:43,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:27:43,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 288 [2022-12-13 11:27:43,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:43,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:27:43,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 288 [2022-12-13 11:27:43,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:27:43,469 INFO L130 PetriNetUnfolder]: 330/495 cut-off events. [2022-12-13 11:27:43,469 INFO L131 PetriNetUnfolder]: For 145/145 co-relation queries the response was YES. [2022-12-13 11:27:43,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 495 events. 330/495 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1728 event pairs, 166 based on Foata normal form. 0/466 useless extension candidates. Maximal degree in co-relation 292. Up to 476 conditions per place. [2022-12-13 11:27:43,473 INFO L137 encePairwiseOnDemand]: 285/288 looper letters, 24 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2022-12-13 11:27:43,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 134 flow [2022-12-13 11:27:43,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:27:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:27:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2022-12-13 11:27:43,476 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4652777777777778 [2022-12-13 11:27:43,477 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2022-12-13 11:27:43,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2022-12-13 11:27:43,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:27:43,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2022-12-13 11:27:43,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:43,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:43,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:43,482 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 3 states and 402 transitions. [2022-12-13 11:27:43,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 134 flow [2022-12-13 11:27:43,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:27:43,483 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 88 flow [2022-12-13 11:27:43,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2022-12-13 11:27:43,484 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2022-12-13 11:27:43,484 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 88 flow [2022-12-13 11:27:43,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:43,485 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:27:43,485 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:27:43,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:27:43,485 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:27:43,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:27:43,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1682518147, now seen corresponding path program 1 times [2022-12-13 11:27:43,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:27:43,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067537836] [2022-12-13 11:27:43,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:27:43,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:27:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:27:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:27:43,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:27:43,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067537836] [2022-12-13 11:27:43,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067537836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:27:43,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348302331] [2022-12-13 11:27:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:27:43,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:27:43,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:27:43,634 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:27:43,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:27:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:27:43,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:27:43,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:27:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:27:43,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:27:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:27:43,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348302331] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 11:27:43,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:27:43,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-12-13 11:27:43,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709943326] [2022-12-13 11:27:43,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:27:43,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 11:27:43,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:27:43,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 11:27:43,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-13 11:27:43,979 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 288 [2022-12-13 11:27:43,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:43,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:27:43,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 288 [2022-12-13 11:27:43,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:27:44,178 INFO L130 PetriNetUnfolder]: 404/586 cut-off events. [2022-12-13 11:27:44,178 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2022-12-13 11:27:44,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 586 events. 404/586 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2063 event pairs, 29 based on Foata normal form. 44/629 useless extension candidates. Maximal degree in co-relation 1389. Up to 332 conditions per place. [2022-12-13 11:27:44,183 INFO L137 encePairwiseOnDemand]: 281/288 looper letters, 48 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2022-12-13 11:27:44,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 60 transitions, 299 flow [2022-12-13 11:27:44,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:27:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:27:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 989 transitions. [2022-12-13 11:27:44,186 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4292534722222222 [2022-12-13 11:27:44,187 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 989 transitions. [2022-12-13 11:27:44,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 989 transitions. [2022-12-13 11:27:44,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:27:44,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 989 transitions. [2022-12-13 11:27:44,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.625) internal successors, (989), 8 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:44,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:44,193 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:44,193 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 88 flow. Second operand 8 states and 989 transitions. [2022-12-13 11:27:44,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 60 transitions, 299 flow [2022-12-13 11:27:44,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 60 transitions, 293 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 11:27:44,196 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 136 flow [2022-12-13 11:27:44,196 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=136, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2022-12-13 11:27:44,197 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2022-12-13 11:27:44,197 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 136 flow [2022-12-13 11:27:44,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:44,198 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:27:44,198 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:27:44,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:27:44,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:27:44,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:27:44,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:27:44,400 INFO L85 PathProgramCache]: Analyzing trace with hash -469590702, now seen corresponding path program 1 times [2022-12-13 11:27:44,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:27:44,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661543040] [2022-12-13 11:27:44,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:27:44,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:27:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:27:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:27:44,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:27:44,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661543040] [2022-12-13 11:27:44,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661543040] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:27:44,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581288554] [2022-12-13 11:27:44,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:27:44,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:27:44,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:27:44,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:27:44,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:27:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:27:44,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:27:44,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:27:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:27:44,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:27:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:27:44,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581288554] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 11:27:44,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:27:44,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-13 11:27:44,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142545947] [2022-12-13 11:27:44,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:27:44,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:27:44,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:27:44,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:27:44,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 11:27:44,674 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 288 [2022-12-13 11:27:44,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:44,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:27:44,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 288 [2022-12-13 11:27:44,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:27:44,774 INFO L130 PetriNetUnfolder]: 302/455 cut-off events. [2022-12-13 11:27:44,775 INFO L131 PetriNetUnfolder]: For 402/447 co-relation queries the response was YES. [2022-12-13 11:27:44,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1354 conditions, 455 events. 302/455 cut-off events. For 402/447 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1470 event pairs, 89 based on Foata normal form. 61/500 useless extension candidates. Maximal degree in co-relation 1332. Up to 337 conditions per place. [2022-12-13 11:27:44,779 INFO L137 encePairwiseOnDemand]: 283/288 looper letters, 38 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2022-12-13 11:27:44,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 283 flow [2022-12-13 11:27:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:27:44,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:27:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2022-12-13 11:27:44,783 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45069444444444445 [2022-12-13 11:27:44,783 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2022-12-13 11:27:44,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2022-12-13 11:27:44,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:27:44,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2022-12-13 11:27:44,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:44,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:44,786 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:44,787 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 136 flow. Second operand 5 states and 649 transitions. [2022-12-13 11:27:44,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 283 flow [2022-12-13 11:27:44,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 266 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-12-13 11:27:44,788 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 146 flow [2022-12-13 11:27:44,788 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=146, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2022-12-13 11:27:44,789 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2022-12-13 11:27:44,789 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 146 flow [2022-12-13 11:27:44,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:27:44,789 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:27:44,789 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:27:44,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:27:44,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:27:44,991 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:27:44,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:27:44,992 INFO L85 PathProgramCache]: Analyzing trace with hash -927891731, now seen corresponding path program 1 times [2022-12-13 11:27:44,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:27:44,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109039374] [2022-12-13 11:27:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:27:44,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:27:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:27:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:27:45,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:27:45,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109039374] [2022-12-13 11:27:45,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109039374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:27:45,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162349905] [2022-12-13 11:27:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:27:45,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:27:45,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:27:45,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:27:45,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:27:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:27:45,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 11:27:45,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:27:46,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 11:27:46,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 11:27:46,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 11:27:46,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:27:46,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-12-13 11:27:46,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:27:46,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:27:46,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 39 [2022-12-13 11:27:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:27:46,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:27:46,993 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset)) (.cse2 (+ c_~A~0.offset (* 4 c_~M~0)))) (let ((.cse3 (forall ((v_ArrVal_177 (Array Int Int))) (< c_~max2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_177) c_~A~0.base) .cse2)))) (.cse0 (< c_~max1~0 .cse5))) (and (or .cse0 (and (forall ((v_ArrVal_177 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_177) c_~A~0.base) .cse2))) (or (= c_~max1~0 .cse1) (not (< c_~max2~0 .cse1))))) (or (= c_~max1~0 c_~max2~0) .cse3))) (or (and (forall ((v_ArrVal_177 (Array Int Int))) (let ((.cse4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_177) c_~A~0.base) .cse2))) (or (not (< c_~max2~0 .cse4)) (= .cse5 .cse4)))) (or (= .cse5 c_~max2~0) .cse3)) (not .cse0))))) is different from false [2022-12-13 11:27:47,099 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_177 (Array Int Int)) (v_ArrVal_176 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_176))) (or (< c_~max2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_177) c_~A~0.base) .cse1)) (< c_~max1~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)))))) (forall ((v_ArrVal_176 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_176))) (let ((.cse2 (select (select .cse3 c_~A~0.base) c_~A~0.offset))) (or (not (< c_~max1~0 .cse2)) (= .cse2 c_~max2~0) (forall ((v_ArrVal_177 (Array Int Int))) (< c_~max2~0 (select (select (store .cse3 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_177) c_~A~0.base) .cse1))))))) (forall ((v_ArrVal_176 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_176))) (or (forall ((v_ArrVal_177 (Array Int Int))) (let ((.cse4 (select (select (store .cse5 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_177) c_~A~0.base) .cse1))) (or (not (< c_~max2~0 .cse4)) (= c_~max1~0 .cse4)))) (< c_~max1~0 (select (select .cse5 c_~A~0.base) c_~A~0.offset))))) (forall ((v_ArrVal_176 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_176))) (let ((.cse7 (select (select .cse8 c_~A~0.base) c_~A~0.offset))) (or (forall ((v_ArrVal_177 (Array Int Int))) (let ((.cse6 (select (select (store .cse8 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_177) c_~A~0.base) .cse1))) (or (= .cse6 .cse7) (not (< c_~max2~0 .cse6))))) (not (< c_~max1~0 .cse7)))))))) is different from false [2022-12-13 11:27:47,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:27:47,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 46 [2022-12-13 11:27:47,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:27:47,514 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 411 treesize of output 397 [2022-12-13 11:27:47,525 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 282 treesize of output 234 [2022-12-13 11:27:47,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:27:47,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 317 [2022-12-13 11:27:47,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:27:47,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 307 treesize of output 301 [2022-12-13 11:27:48,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:27:48,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 78 [2022-12-13 11:27:48,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:27:48,638 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 894 treesize of output 828 [2022-12-13 11:27:48,649 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 766 treesize of output 646 [2022-12-13 11:27:48,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:27:48,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 698 treesize of output 612 [2022-12-13 11:27:48,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:27:48,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 602 treesize of output 564 [2022-12-13 11:28:58,558 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 11:28:58,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 1 [2022-12-13 11:28:58,565 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 11:28:58,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 1 [2022-12-13 11:28:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:28:58,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162349905] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:28:58,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:28:58,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 28 [2022-12-13 11:28:58,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976994569] [2022-12-13 11:28:58,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:28:58,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 11:28:58,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:28:58,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 11:28:58,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=8, NotChecked=106, Total=870 [2022-12-13 11:28:58,744 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 288 [2022-12-13 11:28:58,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 146 flow. Second operand has 30 states, 30 states have (on average 80.1) internal successors, (2403), 30 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:28:58,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:28:58,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 288 [2022-12-13 11:28:58,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:29:04,521 INFO L130 PetriNetUnfolder]: 869/1300 cut-off events. [2022-12-13 11:29:04,521 INFO L131 PetriNetUnfolder]: For 1305/1305 co-relation queries the response was YES. [2022-12-13 11:29:04,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4128 conditions, 1300 events. 869/1300 cut-off events. For 1305/1305 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4925 event pairs, 88 based on Foata normal form. 14/1314 useless extension candidates. Maximal degree in co-relation 2922. Up to 707 conditions per place. [2022-12-13 11:29:04,526 INFO L137 encePairwiseOnDemand]: 275/288 looper letters, 122 selfloop transitions, 57 changer transitions 7/186 dead transitions. [2022-12-13 11:29:04,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 186 transitions, 1077 flow [2022-12-13 11:29:04,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 11:29:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 11:29:04,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1736 transitions. [2022-12-13 11:29:04,530 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3013888888888889 [2022-12-13 11:29:04,530 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1736 transitions. [2022-12-13 11:29:04,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1736 transitions. [2022-12-13 11:29:04,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:29:04,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1736 transitions. [2022-12-13 11:29:04,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 86.8) internal successors, (1736), 20 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:04,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 288.0) internal successors, (6048), 21 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:04,538 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 288.0) internal successors, (6048), 21 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:04,539 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 146 flow. Second operand 20 states and 1736 transitions. [2022-12-13 11:29:04,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 186 transitions, 1077 flow [2022-12-13 11:29:04,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 186 transitions, 1047 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-12-13 11:29:04,545 INFO L231 Difference]: Finished difference. Result has 66 places, 85 transitions, 595 flow [2022-12-13 11:29:04,545 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=595, PETRI_PLACES=66, PETRI_TRANSITIONS=85} [2022-12-13 11:29:04,546 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2022-12-13 11:29:04,546 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 85 transitions, 595 flow [2022-12-13 11:29:04,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 80.1) internal successors, (2403), 30 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:04,547 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:29:04,547 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:29:04,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:29:04,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:29:04,748 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:29:04,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:29:04,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1195108703, now seen corresponding path program 2 times [2022-12-13 11:29:04,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:29:04,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973325085] [2022-12-13 11:29:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:29:04,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:29:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:29:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:05,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:29:05,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973325085] [2022-12-13 11:29:05,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973325085] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:29:05,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017612285] [2022-12-13 11:29:05,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:29:05,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:29:05,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:29:05,475 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:29:05,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:29:05,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:29:05,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:29:05,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 11:29:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:29:05,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:29:05,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 46 [2022-12-13 11:29:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:06,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:29:06,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:29:06,183 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 87 treesize of output 51 [2022-12-13 11:29:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:06,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017612285] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:29:06,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:29:06,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 22 [2022-12-13 11:29:06,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724731148] [2022-12-13 11:29:06,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:29:06,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 11:29:06,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:29:06,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 11:29:06,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-12-13 11:29:07,410 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 288 [2022-12-13 11:29:07,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 85 transitions, 595 flow. Second operand has 24 states, 24 states have (on average 106.41666666666667) internal successors, (2554), 24 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:07,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:29:07,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 288 [2022-12-13 11:29:07,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:29:08,358 INFO L130 PetriNetUnfolder]: 1049/1616 cut-off events. [2022-12-13 11:29:08,358 INFO L131 PetriNetUnfolder]: For 3800/3802 co-relation queries the response was YES. [2022-12-13 11:29:08,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6391 conditions, 1616 events. 1049/1616 cut-off events. For 3800/3802 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7156 event pairs, 156 based on Foata normal form. 3/1601 useless extension candidates. Maximal degree in co-relation 6281. Up to 944 conditions per place. [2022-12-13 11:29:08,375 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 114 selfloop transitions, 55 changer transitions 3/180 dead transitions. [2022-12-13 11:29:08,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 180 transitions, 1380 flow [2022-12-13 11:29:08,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:29:08,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 11:29:08,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1468 transitions. [2022-12-13 11:29:08,382 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3920940170940171 [2022-12-13 11:29:08,382 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1468 transitions. [2022-12-13 11:29:08,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1468 transitions. [2022-12-13 11:29:08,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:29:08,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1468 transitions. [2022-12-13 11:29:08,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 112.92307692307692) internal successors, (1468), 13 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:08,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 288.0) internal successors, (4032), 14 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:08,397 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 288.0) internal successors, (4032), 14 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:08,397 INFO L175 Difference]: Start difference. First operand has 66 places, 85 transitions, 595 flow. Second operand 13 states and 1468 transitions. [2022-12-13 11:29:08,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 180 transitions, 1380 flow [2022-12-13 11:29:08,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 180 transitions, 1282 flow, removed 38 selfloop flow, removed 3 redundant places. [2022-12-13 11:29:08,417 INFO L231 Difference]: Finished difference. Result has 80 places, 111 transitions, 878 flow [2022-12-13 11:29:08,418 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=878, PETRI_PLACES=80, PETRI_TRANSITIONS=111} [2022-12-13 11:29:08,418 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2022-12-13 11:29:08,419 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 111 transitions, 878 flow [2022-12-13 11:29:08,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 106.41666666666667) internal successors, (2554), 24 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:08,420 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:29:08,420 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:29:08,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 11:29:08,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:29:08,621 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:29:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:29:08,622 INFO L85 PathProgramCache]: Analyzing trace with hash 670519049, now seen corresponding path program 3 times [2022-12-13 11:29:08,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:29:08,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917535629] [2022-12-13 11:29:08,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:29:08,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:29:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:29:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:09,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:29:09,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917535629] [2022-12-13 11:29:09,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917535629] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:29:09,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616044722] [2022-12-13 11:29:09,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:29:09,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:29:09,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:29:09,100 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:29:09,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:29:09,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 11:29:09,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:29:09,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 11:29:09,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:29:09,444 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 56 treesize of output 32 [2022-12-13 11:29:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:09,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:29:09,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:29:09,567 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 87 treesize of output 51 [2022-12-13 11:29:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:09,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616044722] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:29:09,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:29:09,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-12-13 11:29:09,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255398286] [2022-12-13 11:29:09,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:29:09,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 11:29:09,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:29:09,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 11:29:09,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-12-13 11:29:10,362 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 288 [2022-12-13 11:29:10,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 111 transitions, 878 flow. Second operand has 24 states, 24 states have (on average 106.16666666666667) internal successors, (2548), 24 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:10,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:29:10,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 288 [2022-12-13 11:29:10,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:29:11,193 INFO L130 PetriNetUnfolder]: 1366/2069 cut-off events. [2022-12-13 11:29:11,193 INFO L131 PetriNetUnfolder]: For 7074/7074 co-relation queries the response was YES. [2022-12-13 11:29:11,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9135 conditions, 2069 events. 1366/2069 cut-off events. For 7074/7074 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8893 event pairs, 346 based on Foata normal form. 1/2070 useless extension candidates. Maximal degree in co-relation 9003. Up to 1707 conditions per place. [2022-12-13 11:29:11,204 INFO L137 encePairwiseOnDemand]: 275/288 looper letters, 131 selfloop transitions, 59 changer transitions 1/191 dead transitions. [2022-12-13 11:29:11,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 191 transitions, 1707 flow [2022-12-13 11:29:11,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:29:11,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 11:29:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1557 transitions. [2022-12-13 11:29:11,207 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3861607142857143 [2022-12-13 11:29:11,207 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1557 transitions. [2022-12-13 11:29:11,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1557 transitions. [2022-12-13 11:29:11,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:29:11,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1557 transitions. [2022-12-13 11:29:11,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 111.21428571428571) internal successors, (1557), 14 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:11,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 288.0) internal successors, (4320), 15 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:11,213 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 288.0) internal successors, (4320), 15 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:11,213 INFO L175 Difference]: Start difference. First operand has 80 places, 111 transitions, 878 flow. Second operand 14 states and 1557 transitions. [2022-12-13 11:29:11,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 191 transitions, 1707 flow [2022-12-13 11:29:11,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 191 transitions, 1613 flow, removed 26 selfloop flow, removed 6 redundant places. [2022-12-13 11:29:11,234 INFO L231 Difference]: Finished difference. Result has 95 places, 144 transitions, 1262 flow [2022-12-13 11:29:11,234 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1262, PETRI_PLACES=95, PETRI_TRANSITIONS=144} [2022-12-13 11:29:11,234 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 65 predicate places. [2022-12-13 11:29:11,234 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 144 transitions, 1262 flow [2022-12-13 11:29:11,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 106.16666666666667) internal successors, (2548), 24 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:11,235 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:29:11,235 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:29:11,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 11:29:11,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:29:11,436 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:29:11,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:29:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash -296932887, now seen corresponding path program 4 times [2022-12-13 11:29:11,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:29:11,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841772818] [2022-12-13 11:29:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:29:11,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:29:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:29:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:12,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:29:12,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841772818] [2022-12-13 11:29:12,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841772818] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:29:12,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811837786] [2022-12-13 11:29:12,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:29:12,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:29:12,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:29:12,093 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:29:12,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:29:12,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:29:12,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:29:12,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 11:29:12,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:29:12,474 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-12-13 11:29:12,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 69 [2022-12-13 11:29:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:29:12,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:29:12,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:29:12,673 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 87 treesize of output 51 [2022-12-13 11:29:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:29:12,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811837786] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:29:12,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:29:12,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 25 [2022-12-13 11:29:12,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920418307] [2022-12-13 11:29:12,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:29:12,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 11:29:12,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:29:12,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 11:29:12,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-12-13 11:29:13,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 288 [2022-12-13 11:29:13,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 144 transitions, 1262 flow. Second operand has 27 states, 27 states have (on average 108.29629629629629) internal successors, (2924), 27 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:13,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:29:13,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 288 [2022-12-13 11:29:13,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:29:16,169 INFO L130 PetriNetUnfolder]: 2627/4136 cut-off events. [2022-12-13 11:29:16,169 INFO L131 PetriNetUnfolder]: For 15465/15465 co-relation queries the response was YES. [2022-12-13 11:29:16,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18816 conditions, 4136 events. 2627/4136 cut-off events. For 15465/15465 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22474 event pairs, 112 based on Foata normal form. 4/4140 useless extension candidates. Maximal degree in co-relation 18597. Up to 1738 conditions per place. [2022-12-13 11:29:16,188 INFO L137 encePairwiseOnDemand]: 274/288 looper letters, 241 selfloop transitions, 225 changer transitions 23/489 dead transitions. [2022-12-13 11:29:16,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 489 transitions, 4442 flow [2022-12-13 11:29:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 11:29:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-13 11:29:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3660 transitions. [2022-12-13 11:29:16,194 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3971354166666667 [2022-12-13 11:29:16,194 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3660 transitions. [2022-12-13 11:29:16,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3660 transitions. [2022-12-13 11:29:16,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:29:16,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3660 transitions. [2022-12-13 11:29:16,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 114.375) internal successors, (3660), 32 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:16,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 288.0) internal successors, (9504), 33 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:16,208 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 288.0) internal successors, (9504), 33 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:16,208 INFO L175 Difference]: Start difference. First operand has 95 places, 144 transitions, 1262 flow. Second operand 32 states and 3660 transitions. [2022-12-13 11:29:16,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 489 transitions, 4442 flow [2022-12-13 11:29:16,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 489 transitions, 4361 flow, removed 38 selfloop flow, removed 2 redundant places. [2022-12-13 11:29:16,258 INFO L231 Difference]: Finished difference. Result has 143 places, 306 transitions, 3340 flow [2022-12-13 11:29:16,258 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3340, PETRI_PLACES=143, PETRI_TRANSITIONS=306} [2022-12-13 11:29:16,258 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2022-12-13 11:29:16,258 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 306 transitions, 3340 flow [2022-12-13 11:29:16,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 108.29629629629629) internal successors, (2924), 27 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:16,259 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:29:16,259 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:29:16,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 11:29:16,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 11:29:16,461 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:29:16,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:29:16,462 INFO L85 PathProgramCache]: Analyzing trace with hash -640481041, now seen corresponding path program 5 times [2022-12-13 11:29:16,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:29:16,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671769979] [2022-12-13 11:29:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:29:16,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:29:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:29:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:17,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:29:17,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671769979] [2022-12-13 11:29:17,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671769979] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:29:17,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705337161] [2022-12-13 11:29:17,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:29:17,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:29:17,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:29:17,096 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:29:17,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 11:29:17,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:29:17,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:29:17,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 11:29:17,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:29:17,591 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 56 treesize of output 32 [2022-12-13 11:29:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:17,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:29:17,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:29:17,756 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 87 treesize of output 51 [2022-12-13 11:29:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:17,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705337161] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:29:17,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:29:17,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 23 [2022-12-13 11:29:17,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644882910] [2022-12-13 11:29:17,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:29:17,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 11:29:17,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:29:17,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 11:29:17,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-12-13 11:29:18,827 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 288 [2022-12-13 11:29:18,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 306 transitions, 3340 flow. Second operand has 25 states, 25 states have (on average 106.48) internal successors, (2662), 25 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:18,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:29:18,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 288 [2022-12-13 11:29:18,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:29:20,766 INFO L130 PetriNetUnfolder]: 2773/4362 cut-off events. [2022-12-13 11:29:20,766 INFO L131 PetriNetUnfolder]: For 32243/32243 co-relation queries the response was YES. [2022-12-13 11:29:20,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25085 conditions, 4362 events. 2773/4362 cut-off events. For 32243/32243 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 23750 event pairs, 414 based on Foata normal form. 2/4364 useless extension candidates. Maximal degree in co-relation 25024. Up to 3254 conditions per place. [2022-12-13 11:29:20,789 INFO L137 encePairwiseOnDemand]: 275/288 looper letters, 293 selfloop transitions, 162 changer transitions 5/460 dead transitions. [2022-12-13 11:29:20,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 460 transitions, 5504 flow [2022-12-13 11:29:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 11:29:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 11:29:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2892 transitions. [2022-12-13 11:29:20,793 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38621794871794873 [2022-12-13 11:29:20,793 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2892 transitions. [2022-12-13 11:29:20,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2892 transitions. [2022-12-13 11:29:20,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:29:20,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2892 transitions. [2022-12-13 11:29:20,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 111.23076923076923) internal successors, (2892), 26 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:20,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 288.0) internal successors, (7776), 27 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:20,803 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 288.0) internal successors, (7776), 27 states have internal predecessors, (7776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:20,803 INFO L175 Difference]: Start difference. First operand has 143 places, 306 transitions, 3340 flow. Second operand 26 states and 2892 transitions. [2022-12-13 11:29:20,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 460 transitions, 5504 flow [2022-12-13 11:29:20,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 460 transitions, 5149 flow, removed 157 selfloop flow, removed 7 redundant places. [2022-12-13 11:29:20,941 INFO L231 Difference]: Finished difference. Result has 164 places, 361 transitions, 4092 flow [2022-12-13 11:29:20,941 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=3051, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4092, PETRI_PLACES=164, PETRI_TRANSITIONS=361} [2022-12-13 11:29:20,941 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 134 predicate places. [2022-12-13 11:29:20,941 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 361 transitions, 4092 flow [2022-12-13 11:29:20,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 106.48) internal successors, (2662), 25 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:20,942 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:29:20,942 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:29:20,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 11:29:21,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:29:21,143 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:29:21,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:29:21,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2078072167, now seen corresponding path program 6 times [2022-12-13 11:29:21,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:29:21,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531716365] [2022-12-13 11:29:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:29:21,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:29:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:29:21,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:21,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:29:21,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531716365] [2022-12-13 11:29:21,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531716365] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:29:21,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094757401] [2022-12-13 11:29:21,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:29:21,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:29:21,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:29:21,721 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:29:21,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 11:29:21,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 11:29:21,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:29:21,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 11:29:21,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:29:22,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:29:22,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2022-12-13 11:29:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:29:22,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:29:22,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:29:22,379 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 87 treesize of output 51 [2022-12-13 11:29:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:29:22,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094757401] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:29:22,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:29:22,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 24 [2022-12-13 11:29:22,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368610687] [2022-12-13 11:29:22,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:29:22,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 11:29:22,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:29:22,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 11:29:22,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-12-13 11:29:23,133 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 288 [2022-12-13 11:29:23,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 361 transitions, 4092 flow. Second operand has 26 states, 26 states have (on average 108.34615384615384) internal successors, (2817), 26 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:23,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:29:23,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 288 [2022-12-13 11:29:23,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:29:25,274 INFO L130 PetriNetUnfolder]: 3169/5061 cut-off events. [2022-12-13 11:29:25,274 INFO L131 PetriNetUnfolder]: For 43640/43640 co-relation queries the response was YES. [2022-12-13 11:29:25,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30337 conditions, 5061 events. 3169/5061 cut-off events. For 43640/43640 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 29035 event pairs, 377 based on Foata normal form. 3/5064 useless extension candidates. Maximal degree in co-relation 30057. Up to 2843 conditions per place. [2022-12-13 11:29:25,317 INFO L137 encePairwiseOnDemand]: 275/288 looper letters, 328 selfloop transitions, 249 changer transitions 19/596 dead transitions. [2022-12-13 11:29:25,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 596 transitions, 7241 flow [2022-12-13 11:29:25,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 11:29:25,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 11:29:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2763 transitions. [2022-12-13 11:29:25,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3997395833333333 [2022-12-13 11:29:25,322 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2763 transitions. [2022-12-13 11:29:25,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2763 transitions. [2022-12-13 11:29:25,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:29:25,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2763 transitions. [2022-12-13 11:29:25,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 115.125) internal successors, (2763), 24 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:25,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 288.0) internal successors, (7200), 25 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:25,329 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 288.0) internal successors, (7200), 25 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:25,329 INFO L175 Difference]: Start difference. First operand has 164 places, 361 transitions, 4092 flow. Second operand 24 states and 2763 transitions. [2022-12-13 11:29:25,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 596 transitions, 7241 flow [2022-12-13 11:29:25,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 596 transitions, 6986 flow, removed 83 selfloop flow, removed 10 redundant places. [2022-12-13 11:29:25,523 INFO L231 Difference]: Finished difference. Result has 189 places, 441 transitions, 5703 flow [2022-12-13 11:29:25,523 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=3854, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5703, PETRI_PLACES=189, PETRI_TRANSITIONS=441} [2022-12-13 11:29:25,524 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2022-12-13 11:29:25,524 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 441 transitions, 5703 flow [2022-12-13 11:29:25,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 108.34615384615384) internal successors, (2817), 26 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:25,524 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:29:25,524 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:29:25,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 11:29:25,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 11:29:25,726 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:29:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:29:25,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2067242501, now seen corresponding path program 7 times [2022-12-13 11:29:25,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:29:25,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244794838] [2022-12-13 11:29:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:29:25,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:29:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:29:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:26,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:29:26,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244794838] [2022-12-13 11:29:26,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244794838] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:29:26,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042818681] [2022-12-13 11:29:26,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:29:26,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:29:26,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:29:26,105 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:29:26,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 11:29:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:29:26,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 11:29:26,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:29:26,423 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:29:26,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2022-12-13 11:29:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:26,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:29:26,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:29:26,755 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 87 treesize of output 51 [2022-12-13 11:29:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:26,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042818681] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:29:26,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:29:26,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 25 [2022-12-13 11:29:26,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384669136] [2022-12-13 11:29:26,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:29:26,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 11:29:26,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:29:26,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 11:29:26,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-12-13 11:29:28,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 288 [2022-12-13 11:29:28,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 441 transitions, 5703 flow. Second operand has 27 states, 27 states have (on average 106.25925925925925) internal successors, (2869), 27 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:28,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:29:28,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 288 [2022-12-13 11:29:28,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:29:31,086 INFO L130 PetriNetUnfolder]: 3369/5391 cut-off events. [2022-12-13 11:29:31,086 INFO L131 PetriNetUnfolder]: For 63469/63469 co-relation queries the response was YES. [2022-12-13 11:29:31,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36094 conditions, 5391 events. 3369/5391 cut-off events. For 63469/63469 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 31066 event pairs, 726 based on Foata normal form. 3/5394 useless extension candidates. Maximal degree in co-relation 35803. Up to 4708 conditions per place. [2022-12-13 11:29:31,161 INFO L137 encePairwiseOnDemand]: 276/288 looper letters, 421 selfloop transitions, 163 changer transitions 11/595 dead transitions. [2022-12-13 11:29:31,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 595 transitions, 8186 flow [2022-12-13 11:29:31,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 11:29:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 11:29:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3113 transitions. [2022-12-13 11:29:31,172 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38603670634920634 [2022-12-13 11:29:31,173 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3113 transitions. [2022-12-13 11:29:31,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3113 transitions. [2022-12-13 11:29:31,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:29:31,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3113 transitions. [2022-12-13 11:29:31,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 111.17857142857143) internal successors, (3113), 28 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:31,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 288.0) internal successors, (8352), 29 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:31,181 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 288.0) internal successors, (8352), 29 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:31,181 INFO L175 Difference]: Start difference. First operand has 189 places, 441 transitions, 5703 flow. Second operand 28 states and 3113 transitions. [2022-12-13 11:29:31,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 595 transitions, 8186 flow [2022-12-13 11:29:31,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 595 transitions, 7789 flow, removed 156 selfloop flow, removed 8 redundant places. [2022-12-13 11:29:31,472 INFO L231 Difference]: Finished difference. Result has 213 places, 484 transitions, 6395 flow [2022-12-13 11:29:31,472 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=5352, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6395, PETRI_PLACES=213, PETRI_TRANSITIONS=484} [2022-12-13 11:29:31,472 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2022-12-13 11:29:31,472 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 484 transitions, 6395 flow [2022-12-13 11:29:31,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 106.25925925925925) internal successors, (2869), 27 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:31,473 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:29:31,473 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:29:31,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 11:29:31,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 11:29:31,674 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:29:31,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:29:31,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1691561591, now seen corresponding path program 8 times [2022-12-13 11:29:31,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:29:31,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908555425] [2022-12-13 11:29:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:29:31,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:29:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:29:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:32,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:29:32,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908555425] [2022-12-13 11:29:32,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908555425] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:29:32,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435058865] [2022-12-13 11:29:32,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:29:32,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:29:32,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:29:32,053 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:29:32,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 11:29:32,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:29:32,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:29:32,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 11:29:32,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:29:32,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:29:32,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2022-12-13 11:29:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:32,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:29:32,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:29:32,950 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 75 treesize of output 49 [2022-12-13 11:29:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:33,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435058865] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:29:33,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:29:33,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-12-13 11:29:33,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294875500] [2022-12-13 11:29:33,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:29:33,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 11:29:33,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:29:33,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 11:29:33,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2022-12-13 11:29:34,241 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2022-12-13 11:29:34,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 484 transitions, 6395 flow. Second operand has 30 states, 30 states have (on average 107.03333333333333) internal successors, (3211), 30 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:34,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:29:34,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2022-12-13 11:29:34,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:29:37,661 INFO L130 PetriNetUnfolder]: 4126/6578 cut-off events. [2022-12-13 11:29:37,661 INFO L131 PetriNetUnfolder]: For 85006/85006 co-relation queries the response was YES. [2022-12-13 11:29:37,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45453 conditions, 6578 events. 4126/6578 cut-off events. For 85006/85006 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 39241 event pairs, 734 based on Foata normal form. 3/6581 useless extension candidates. Maximal degree in co-relation 45214. Up to 5383 conditions per place. [2022-12-13 11:29:37,702 INFO L137 encePairwiseOnDemand]: 274/288 looper letters, 496 selfloop transitions, 272 changer transitions 15/783 dead transitions. [2022-12-13 11:29:37,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 783 transitions, 11455 flow [2022-12-13 11:29:37,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 11:29:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-13 11:29:37,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3704 transitions. [2022-12-13 11:29:37,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3897306397306397 [2022-12-13 11:29:37,705 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3704 transitions. [2022-12-13 11:29:37,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3704 transitions. [2022-12-13 11:29:37,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:29:37,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3704 transitions. [2022-12-13 11:29:37,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 112.24242424242425) internal successors, (3704), 33 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:37,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 288.0) internal successors, (9792), 34 states have internal predecessors, (9792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:37,716 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 288.0) internal successors, (9792), 34 states have internal predecessors, (9792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:37,716 INFO L175 Difference]: Start difference. First operand has 213 places, 484 transitions, 6395 flow. Second operand 33 states and 3704 transitions. [2022-12-13 11:29:37,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 783 transitions, 11455 flow [2022-12-13 11:29:38,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 783 transitions, 11100 flow, removed 124 selfloop flow, removed 13 redundant places. [2022-12-13 11:29:38,092 INFO L231 Difference]: Finished difference. Result has 250 places, 646 transitions, 9538 flow [2022-12-13 11:29:38,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=6172, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=9538, PETRI_PLACES=250, PETRI_TRANSITIONS=646} [2022-12-13 11:29:38,093 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2022-12-13 11:29:38,093 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 646 transitions, 9538 flow [2022-12-13 11:29:38,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 107.03333333333333) internal successors, (3211), 30 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:38,094 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:29:38,094 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:29:38,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 11:29:38,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 11:29:38,296 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:29:38,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:29:38,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2086681603, now seen corresponding path program 9 times [2022-12-13 11:29:38,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:29:38,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506997587] [2022-12-13 11:29:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:29:38,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:29:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:29:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:38,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:29:38,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506997587] [2022-12-13 11:29:38,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506997587] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:29:38,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148730192] [2022-12-13 11:29:38,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:29:38,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:29:38,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:29:38,758 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:29:38,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 11:29:38,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 11:29:38,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:29:38,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 11:29:38,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:29:39,072 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 55 treesize of output 31 [2022-12-13 11:29:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:39,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:29:39,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:29:39,219 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 75 treesize of output 49 [2022-12-13 11:29:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:39,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148730192] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:29:39,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:29:39,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 21 [2022-12-13 11:29:39,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712641147] [2022-12-13 11:29:39,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:29:39,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:29:39,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:29:39,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:29:39,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-12-13 11:29:40,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 288 [2022-12-13 11:29:40,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 646 transitions, 9538 flow. Second operand has 23 states, 23 states have (on average 108.65217391304348) internal successors, (2499), 23 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:40,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:29:40,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 288 [2022-12-13 11:29:40,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:29:42,602 INFO L130 PetriNetUnfolder]: 4340/6900 cut-off events. [2022-12-13 11:29:42,602 INFO L131 PetriNetUnfolder]: For 111026/111026 co-relation queries the response was YES. [2022-12-13 11:29:42,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51656 conditions, 6900 events. 4340/6900 cut-off events. For 111026/111026 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 41276 event pairs, 826 based on Foata normal form. 2/6902 useless extension candidates. Maximal degree in co-relation 51368. Up to 5761 conditions per place. [2022-12-13 11:29:42,652 INFO L137 encePairwiseOnDemand]: 275/288 looper letters, 510 selfloop transitions, 230 changer transitions 1/741 dead transitions. [2022-12-13 11:29:42,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 741 transitions, 12189 flow [2022-12-13 11:29:42,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 11:29:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 11:29:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2055 transitions. [2022-12-13 11:29:42,656 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39641203703703703 [2022-12-13 11:29:42,656 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2055 transitions. [2022-12-13 11:29:42,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2055 transitions. [2022-12-13 11:29:42,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:29:42,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2055 transitions. [2022-12-13 11:29:42,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 114.16666666666667) internal successors, (2055), 18 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:42,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 288.0) internal successors, (5472), 19 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:42,661 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 288.0) internal successors, (5472), 19 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:42,661 INFO L175 Difference]: Start difference. First operand has 250 places, 646 transitions, 9538 flow. Second operand 18 states and 2055 transitions. [2022-12-13 11:29:42,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 741 transitions, 12189 flow [2022-12-13 11:29:43,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 741 transitions, 11360 flow, removed 407 selfloop flow, removed 4 redundant places. [2022-12-13 11:29:43,231 INFO L231 Difference]: Finished difference. Result has 265 places, 668 transitions, 9778 flow [2022-12-13 11:29:43,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=8772, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9778, PETRI_PLACES=265, PETRI_TRANSITIONS=668} [2022-12-13 11:29:43,231 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2022-12-13 11:29:43,231 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 668 transitions, 9778 flow [2022-12-13 11:29:43,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 108.65217391304348) internal successors, (2499), 23 states have internal predecessors, (2499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:43,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:29:43,232 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:29:43,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 11:29:43,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:29:43,433 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:29:43,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:29:43,434 INFO L85 PathProgramCache]: Analyzing trace with hash 182581535, now seen corresponding path program 10 times [2022-12-13 11:29:43,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:29:43,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018760674] [2022-12-13 11:29:43,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:29:43,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:29:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:29:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:29:44,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:29:44,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018760674] [2022-12-13 11:29:44,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018760674] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:29:44,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945762904] [2022-12-13 11:29:44,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:29:44,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:29:44,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:29:44,001 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:29:44,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 11:29:44,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:29:44,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:29:44,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 11:29:44,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:29:44,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:29:44,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-12-13 11:29:44,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:29:44,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-12-13 11:29:44,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:29:44,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 46 [2022-12-13 11:29:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:29:44,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:29:46,900 WARN L837 $PredicateComparison]: unable to prove that (and (or (forall ((~M~0 Int) (v_ArrVal_575 (Array Int Int))) (or (< c_~max2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_575) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4)))) (not (< ~M~0 c_~N~0)) (< (+ ~M~0 1) c_~N~0))) (= c_~max1~0 c_~max2~0)) (forall ((~M~0 Int) (v_ArrVal_575 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_575) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (or (not (< c_~max2~0 .cse0)) (not (< ~M~0 c_~N~0)) (= c_~max1~0 .cse0) (< (+ ~M~0 1) c_~N~0))))) is different from false [2022-12-13 11:29:57,813 WARN L233 SmtUtils]: Spent 6.62s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:29:57,864 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-12-13 11:29:57,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 355 treesize of output 323 [2022-12-13 11:29:57,877 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 276 treesize of output 264 [2022-12-13 11:29:57,886 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 264 treesize of output 240 [2022-12-13 11:29:57,895 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 240 treesize of output 216 [2022-12-13 11:29:57,904 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 216 treesize of output 204 [2022-12-13 11:29:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:29:58,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945762904] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:29:58,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:29:58,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2022-12-13 11:29:58,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808366776] [2022-12-13 11:29:58,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:29:58,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 11:29:58,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:29:58,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 11:29:58,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=643, Unknown=2, NotChecked=52, Total=812 [2022-12-13 11:29:58,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 288 [2022-12-13 11:29:58,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 668 transitions, 9778 flow. Second operand has 29 states, 29 states have (on average 83.20689655172414) internal successors, (2413), 29 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:29:58,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:29:58,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 288 [2022-12-13 11:29:58,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:30:07,104 WARN L233 SmtUtils]: Spent 8.18s on a formula simplification. DAG size of input: 50 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:30:07,891 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (= c_~max1~0 c_~max2~0))) (let ((.cse0 (or (forall ((~M~0 Int) (v_ArrVal_575 (Array Int Int))) (or (< c_~max2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_575) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4)))) (not (< ~M~0 c_~N~0)) (< (+ ~M~0 1) c_~N~0))) .cse3)) (.cse4 (forall ((~M~0 Int) (v_ArrVal_575 (Array Int Int))) (let ((.cse5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_575) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (or (not (< c_~max2~0 .cse5)) (not (< ~M~0 c_~N~0)) (= c_~max1~0 .cse5) (< (+ ~M~0 1) c_~N~0))))) (.cse1 (< c_thread1Thread1of1ForFork2_~i~0 c_~N~0))) (and .cse0 (or .cse1 (and (forall ((~M~0 Int) (v_ArrVal_575 (Array Int Int)) (v_ArrVal_574 (Array Int Int))) (let ((.cse2 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_574) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_575) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))))) (or (not (< ~M~0 c_~N~0)) (not (< c_~max2~0 .cse2)) (= c_~max1~0 .cse2) (< (+ ~M~0 1) c_~N~0)))) (or (forall ((~M~0 Int) (v_ArrVal_575 (Array Int Int)) (v_ArrVal_574 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (< c_~max2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_574) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_575) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4)))) (< (+ ~M~0 1) c_~N~0))) .cse3))) .cse4 (or (and .cse0 .cse4) .cse1)))) is different from false [2022-12-13 11:30:13,277 WARN L233 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 66 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:30:15,879 INFO L130 PetriNetUnfolder]: 5530/8799 cut-off events. [2022-12-13 11:30:15,879 INFO L131 PetriNetUnfolder]: For 135338/135338 co-relation queries the response was YES. [2022-12-13 11:30:15,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65163 conditions, 8799 events. 5530/8799 cut-off events. For 135338/135338 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 55702 event pairs, 478 based on Foata normal form. 5/8804 useless extension candidates. Maximal degree in co-relation 64871. Up to 4722 conditions per place. [2022-12-13 11:30:15,946 INFO L137 encePairwiseOnDemand]: 272/288 looper letters, 516 selfloop transitions, 537 changer transitions 13/1066 dead transitions. [2022-12-13 11:30:15,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1066 transitions, 16954 flow [2022-12-13 11:30:15,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 11:30:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 11:30:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2170 transitions. [2022-12-13 11:30:15,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31394675925925924 [2022-12-13 11:30:15,949 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2170 transitions. [2022-12-13 11:30:15,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2170 transitions. [2022-12-13 11:30:15,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:30:15,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2170 transitions. [2022-12-13 11:30:15,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 90.41666666666667) internal successors, (2170), 24 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:15,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 288.0) internal successors, (7200), 25 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:15,955 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 288.0) internal successors, (7200), 25 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:15,956 INFO L175 Difference]: Start difference. First operand has 265 places, 668 transitions, 9778 flow. Second operand 24 states and 2170 transitions. [2022-12-13 11:30:15,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1066 transitions, 16954 flow [2022-12-13 11:30:16,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1066 transitions, 16635 flow, removed 103 selfloop flow, removed 11 redundant places. [2022-12-13 11:30:16,695 INFO L231 Difference]: Finished difference. Result has 291 places, 897 transitions, 14672 flow [2022-12-13 11:30:16,695 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=9497, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=14672, PETRI_PLACES=291, PETRI_TRANSITIONS=897} [2022-12-13 11:30:16,695 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 261 predicate places. [2022-12-13 11:30:16,695 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 897 transitions, 14672 flow [2022-12-13 11:30:16,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 83.20689655172414) internal successors, (2413), 29 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:16,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:30:16,696 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:30:16,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 11:30:16,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 11:30:16,896 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:30:16,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:30:16,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1422066045, now seen corresponding path program 11 times [2022-12-13 11:30:16,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:30:16,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908026018] [2022-12-13 11:30:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:30:16,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:30:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:30:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:30:17,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:30:17,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908026018] [2022-12-13 11:30:17,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908026018] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:30:17,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590852247] [2022-12-13 11:30:17,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:30:17,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:30:17,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:30:17,333 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:30:17,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 11:30:17,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:30:17,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:30:17,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 11:30:17,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:30:17,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:30:17,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-12-13 11:30:17,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:30:17,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-12-13 11:30:17,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:30:17,740 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 63 treesize of output 43 [2022-12-13 11:30:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:30:18,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:30:20,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:30:20,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 513 treesize of output 477 [2022-12-13 11:30:20,936 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 418 treesize of output 370 [2022-12-13 11:30:20,943 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 370 treesize of output 346 [2022-12-13 11:30:20,951 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 346 treesize of output 322 [2022-12-13 11:30:20,959 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 322 treesize of output 310 [2022-12-13 11:30:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:30:21,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590852247] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:30:21,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:30:21,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2022-12-13 11:30:21,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529256745] [2022-12-13 11:30:21,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:30:21,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 11:30:21,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:30:21,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 11:30:21,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=789, Unknown=3, NotChecked=0, Total=930 [2022-12-13 11:30:22,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 288 [2022-12-13 11:30:22,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 897 transitions, 14672 flow. Second operand has 31 states, 31 states have (on average 82.96774193548387) internal successors, (2572), 31 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:30:22,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:30:22,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 288 [2022-12-13 11:30:22,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:30:37,262 WARN L233 SmtUtils]: Spent 6.47s on a formula simplification. DAG size of input: 72 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:30:50,379 WARN L233 SmtUtils]: Spent 10.84s on a formula simplification. DAG size of input: 85 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:30:59,020 WARN L233 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 87 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:31:07,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:31:09,945 INFO L130 PetriNetUnfolder]: 7994/12719 cut-off events. [2022-12-13 11:31:09,945 INFO L131 PetriNetUnfolder]: For 254678/254678 co-relation queries the response was YES. [2022-12-13 11:31:10,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106982 conditions, 12719 events. 7994/12719 cut-off events. For 254678/254678 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 85604 event pairs, 876 based on Foata normal form. 14/12733 useless extension candidates. Maximal degree in co-relation 106552. Up to 6085 conditions per place. [2022-12-13 11:31:10,089 INFO L137 encePairwiseOnDemand]: 273/288 looper letters, 791 selfloop transitions, 837 changer transitions 29/1657 dead transitions. [2022-12-13 11:31:10,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1657 transitions, 28284 flow [2022-12-13 11:31:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 11:31:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-13 11:31:10,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4029 transitions. [2022-12-13 11:31:10,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31794507575757575 [2022-12-13 11:31:10,097 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4029 transitions. [2022-12-13 11:31:10,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4029 transitions. [2022-12-13 11:31:10,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:10,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4029 transitions. [2022-12-13 11:31:10,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 91.56818181818181) internal successors, (4029), 44 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:10,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 288.0) internal successors, (12960), 45 states have internal predecessors, (12960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:10,112 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 288.0) internal successors, (12960), 45 states have internal predecessors, (12960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:10,112 INFO L175 Difference]: Start difference. First operand has 291 places, 897 transitions, 14672 flow. Second operand 44 states and 4029 transitions. [2022-12-13 11:31:10,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1657 transitions, 28284 flow [2022-12-13 11:31:12,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1657 transitions, 26551 flow, removed 828 selfloop flow, removed 3 redundant places. [2022-12-13 11:31:12,444 INFO L231 Difference]: Finished difference. Result has 354 places, 1296 transitions, 22963 flow [2022-12-13 11:31:12,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=13679, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=494, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=22963, PETRI_PLACES=354, PETRI_TRANSITIONS=1296} [2022-12-13 11:31:12,445 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 324 predicate places. [2022-12-13 11:31:12,445 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 1296 transitions, 22963 flow [2022-12-13 11:31:12,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 82.96774193548387) internal successors, (2572), 31 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:12,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:12,446 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:31:12,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 11:31:12,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 11:31:12,648 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:31:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:12,649 INFO L85 PathProgramCache]: Analyzing trace with hash -923700359, now seen corresponding path program 12 times [2022-12-13 11:31:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:12,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206897412] [2022-12-13 11:31:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:12,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:31:12,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:12,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206897412] [2022-12-13 11:31:12,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206897412] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:31:12,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186799857] [2022-12-13 11:31:12,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:31:12,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:12,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:31:12,831 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:31:12,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 11:31:12,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 11:31:12,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:31:12,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 11:31:12,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:31:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:31:13,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:31:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:31:13,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186799857] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:31:13,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:31:13,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-12-13 11:31:13,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392208043] [2022-12-13 11:31:13,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:31:13,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:31:13,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:13,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:31:13,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-12-13 11:31:13,316 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 288 [2022-12-13 11:31:13,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1296 transitions, 22963 flow. Second operand has 17 states, 17 states have (on average 124.17647058823529) internal successors, (2111), 17 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:13,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:13,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 288 [2022-12-13 11:31:13,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:18,226 INFO L130 PetriNetUnfolder]: 7803/12900 cut-off events. [2022-12-13 11:31:18,226 INFO L131 PetriNetUnfolder]: For 349013/349602 co-relation queries the response was YES. [2022-12-13 11:31:18,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114128 conditions, 12900 events. 7803/12900 cut-off events. For 349013/349602 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 94134 event pairs, 1583 based on Foata normal form. 981/13776 useless extension candidates. Maximal degree in co-relation 113436. Up to 5079 conditions per place. [2022-12-13 11:31:18,359 INFO L137 encePairwiseOnDemand]: 282/288 looper letters, 1100 selfloop transitions, 206 changer transitions 75/1433 dead transitions. [2022-12-13 11:31:18,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1433 transitions, 27665 flow [2022-12-13 11:31:18,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:31:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:31:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1040 transitions. [2022-12-13 11:31:18,360 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2022-12-13 11:31:18,360 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1040 transitions. [2022-12-13 11:31:18,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1040 transitions. [2022-12-13 11:31:18,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:18,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1040 transitions. [2022-12-13 11:31:18,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 130.0) internal successors, (1040), 8 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:18,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:18,363 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:18,363 INFO L175 Difference]: Start difference. First operand has 354 places, 1296 transitions, 22963 flow. Second operand 8 states and 1040 transitions. [2022-12-13 11:31:18,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1433 transitions, 27665 flow [2022-12-13 11:31:22,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1433 transitions, 25080 flow, removed 1209 selfloop flow, removed 7 redundant places. [2022-12-13 11:31:22,027 INFO L231 Difference]: Finished difference. Result has 358 places, 1191 transitions, 19754 flow [2022-12-13 11:31:22,028 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=19608, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1018, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19754, PETRI_PLACES=358, PETRI_TRANSITIONS=1191} [2022-12-13 11:31:22,028 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 328 predicate places. [2022-12-13 11:31:22,028 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 1191 transitions, 19754 flow [2022-12-13 11:31:22,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 124.17647058823529) internal successors, (2111), 17 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:22,029 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:22,029 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:31:22,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 11:31:22,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 11:31:22,230 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:31:22,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:22,232 INFO L85 PathProgramCache]: Analyzing trace with hash 89028835, now seen corresponding path program 13 times [2022-12-13 11:31:22,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:22,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482201932] [2022-12-13 11:31:22,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:22,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:22,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:22,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482201932] [2022-12-13 11:31:22,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482201932] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:31:22,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908938539] [2022-12-13 11:31:22,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:31:22,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:22,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:31:22,351 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:31:22,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 11:31:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:22,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:31:22,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:31:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:22,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:31:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:31:22,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908938539] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:31:22,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:31:22,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-13 11:31:22,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724126942] [2022-12-13 11:31:22,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:31:22,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:31:22,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:22,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:31:22,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:31:22,714 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 288 [2022-12-13 11:31:22,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 1191 transitions, 19754 flow. Second operand has 14 states, 14 states have (on average 125.78571428571429) internal successors, (1761), 14 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:22,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:22,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 288 [2022-12-13 11:31:22,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:26,522 INFO L130 PetriNetUnfolder]: 6259/10345 cut-off events. [2022-12-13 11:31:26,522 INFO L131 PetriNetUnfolder]: For 262985/264209 co-relation queries the response was YES. [2022-12-13 11:31:26,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90227 conditions, 10345 events. 6259/10345 cut-off events. For 262985/264209 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 73524 event pairs, 1933 based on Foata normal form. 632/10537 useless extension candidates. Maximal degree in co-relation 89580. Up to 5922 conditions per place. [2022-12-13 11:31:26,656 INFO L137 encePairwiseOnDemand]: 283/288 looper letters, 1007 selfloop transitions, 110 changer transitions 10/1214 dead transitions. [2022-12-13 11:31:26,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1214 transitions, 22331 flow [2022-12-13 11:31:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:31:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:31:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 926 transitions. [2022-12-13 11:31:26,658 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4593253968253968 [2022-12-13 11:31:26,658 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 926 transitions. [2022-12-13 11:31:26,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 926 transitions. [2022-12-13 11:31:26,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:26,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 926 transitions. [2022-12-13 11:31:26,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.28571428571428) internal successors, (926), 7 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:26,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:26,661 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:26,661 INFO L175 Difference]: Start difference. First operand has 358 places, 1191 transitions, 19754 flow. Second operand 7 states and 926 transitions. [2022-12-13 11:31:26,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1214 transitions, 22331 flow [2022-12-13 11:31:28,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 1214 transitions, 22120 flow, removed 84 selfloop flow, removed 10 redundant places. [2022-12-13 11:31:28,395 INFO L231 Difference]: Finished difference. Result has 353 places, 1103 transitions, 18826 flow [2022-12-13 11:31:28,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=18018, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=977, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18826, PETRI_PLACES=353, PETRI_TRANSITIONS=1103} [2022-12-13 11:31:28,396 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 323 predicate places. [2022-12-13 11:31:28,396 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1103 transitions, 18826 flow [2022-12-13 11:31:28,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 125.78571428571429) internal successors, (1761), 14 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:28,397 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:28,397 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:31:28,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 11:31:28,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 11:31:28,598 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:31:28,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:28,598 INFO L85 PathProgramCache]: Analyzing trace with hash 547908844, now seen corresponding path program 1 times [2022-12-13 11:31:28,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:28,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397705667] [2022-12-13 11:31:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:28,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:31:28,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:28,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397705667] [2022-12-13 11:31:28,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397705667] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:31:28,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940947972] [2022-12-13 11:31:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:28,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:28,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:31:28,709 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:31:28,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 11:31:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:28,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:31:28,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:31:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:31:28,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:31:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:31:28,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940947972] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:31:28,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:31:28,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-13 11:31:28,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138778553] [2022-12-13 11:31:28,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:31:28,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:31:28,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:28,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:31:28,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:31:29,239 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 288 [2022-12-13 11:31:29,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1103 transitions, 18826 flow. Second operand has 18 states, 18 states have (on average 119.5) internal successors, (2151), 18 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:29,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:29,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 288 [2022-12-13 11:31:29,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:34,006 INFO L130 PetriNetUnfolder]: 7525/12694 cut-off events. [2022-12-13 11:31:34,007 INFO L131 PetriNetUnfolder]: For 309099/309150 co-relation queries the response was YES. [2022-12-13 11:31:34,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110286 conditions, 12694 events. 7525/12694 cut-off events. For 309099/309150 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 94306 event pairs, 704 based on Foata normal form. 311/12993 useless extension candidates. Maximal degree in co-relation 109503. Up to 3693 conditions per place. [2022-12-13 11:31:34,127 INFO L137 encePairwiseOnDemand]: 279/288 looper letters, 1310 selfloop transitions, 343 changer transitions 85/1755 dead transitions. [2022-12-13 11:31:34,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 1755 transitions, 32703 flow [2022-12-13 11:31:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 11:31:34,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 11:31:34,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2528 transitions. [2022-12-13 11:31:34,130 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2022-12-13 11:31:34,130 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2528 transitions. [2022-12-13 11:31:34,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2528 transitions. [2022-12-13 11:31:34,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:34,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2528 transitions. [2022-12-13 11:31:34,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 126.4) internal successors, (2528), 20 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:34,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 288.0) internal successors, (6048), 21 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:34,136 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 288.0) internal successors, (6048), 21 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:34,136 INFO L175 Difference]: Start difference. First operand has 353 places, 1103 transitions, 18826 flow. Second operand 20 states and 2528 transitions. [2022-12-13 11:31:34,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 1755 transitions, 32703 flow [2022-12-13 11:31:36,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1755 transitions, 32566 flow, removed 66 selfloop flow, removed 4 redundant places. [2022-12-13 11:31:36,796 INFO L231 Difference]: Finished difference. Result has 374 places, 1176 transitions, 21434 flow [2022-12-13 11:31:36,796 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=18425, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=21434, PETRI_PLACES=374, PETRI_TRANSITIONS=1176} [2022-12-13 11:31:36,797 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 344 predicate places. [2022-12-13 11:31:36,797 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1176 transitions, 21434 flow [2022-12-13 11:31:36,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 119.5) internal successors, (2151), 18 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:36,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:36,797 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] [2022-12-13 11:31:36,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 11:31:36,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 11:31:36,998 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:31:36,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:36,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1920247922, now seen corresponding path program 2 times [2022-12-13 11:31:36,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:37,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511330865] [2022-12-13 11:31:37,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:37,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:31:37,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:37,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511330865] [2022-12-13 11:31:37,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511330865] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:31:37,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3447592] [2022-12-13 11:31:37,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:31:37,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:37,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:31:37,104 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:31:37,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 11:31:37,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:31:37,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:31:37,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:31:37,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:31:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:31:37,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:31:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:31:37,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3447592] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:31:37,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:31:37,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-13 11:31:37,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556559297] [2022-12-13 11:31:37,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:31:37,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:31:37,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:37,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:31:37,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:31:37,463 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 288 [2022-12-13 11:31:37,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1176 transitions, 21434 flow. Second operand has 16 states, 16 states have (on average 119.4375) internal successors, (1911), 16 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:37,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:37,464 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 288 [2022-12-13 11:31:37,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:41,538 INFO L130 PetriNetUnfolder]: 5574/9867 cut-off events. [2022-12-13 11:31:41,538 INFO L131 PetriNetUnfolder]: For 268866/268921 co-relation queries the response was YES. [2022-12-13 11:31:41,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88369 conditions, 9867 events. 5574/9867 cut-off events. For 268866/268921 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 75034 event pairs, 627 based on Foata normal form. 664/10518 useless extension candidates. Maximal degree in co-relation 88227. Up to 4168 conditions per place. [2022-12-13 11:31:41,656 INFO L137 encePairwiseOnDemand]: 280/288 looper letters, 989 selfloop transitions, 88 changer transitions 80/1172 dead transitions. [2022-12-13 11:31:41,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1172 transitions, 22347 flow [2022-12-13 11:31:41,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 11:31:41,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-13 11:31:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1383 transitions. [2022-12-13 11:31:41,659 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4365530303030303 [2022-12-13 11:31:41,660 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1383 transitions. [2022-12-13 11:31:41,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1383 transitions. [2022-12-13 11:31:41,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:41,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1383 transitions. [2022-12-13 11:31:41,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 125.72727272727273) internal successors, (1383), 11 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:41,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 288.0) internal successors, (3456), 12 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:41,666 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 288.0) internal successors, (3456), 12 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:41,666 INFO L175 Difference]: Start difference. First operand has 374 places, 1176 transitions, 21434 flow. Second operand 11 states and 1383 transitions. [2022-12-13 11:31:41,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1172 transitions, 22347 flow [2022-12-13 11:31:45,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 1172 transitions, 21657 flow, removed 208 selfloop flow, removed 9 redundant places. [2022-12-13 11:31:45,321 INFO L231 Difference]: Finished difference. Result has 366 places, 878 transitions, 15246 flow [2022-12-13 11:31:45,321 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=16111, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=845, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15246, PETRI_PLACES=366, PETRI_TRANSITIONS=878} [2022-12-13 11:31:45,321 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 336 predicate places. [2022-12-13 11:31:45,321 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 878 transitions, 15246 flow [2022-12-13 11:31:45,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 119.4375) internal successors, (1911), 16 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:45,322 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:45,322 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:31:45,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 11:31:45,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:45,523 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:31:45,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:45,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1931715572, now seen corresponding path program 14 times [2022-12-13 11:31:45,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:45,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335753734] [2022-12-13 11:31:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:45,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:31:45,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:45,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335753734] [2022-12-13 11:31:45,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335753734] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:31:45,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017097585] [2022-12-13 11:31:45,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:31:45,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:45,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:31:45,619 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:31:45,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 11:31:45,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:31:45,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:31:45,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:31:45,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:31:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:31:45,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:31:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 11:31:45,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017097585] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:31:45,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:31:45,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-12-13 11:31:45,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113781161] [2022-12-13 11:31:45,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:31:45,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:31:45,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:45,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:31:45,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:31:45,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 288 [2022-12-13 11:31:45,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 878 transitions, 15246 flow. Second operand has 14 states, 14 states have (on average 126.14285714285714) internal successors, (1766), 14 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:45,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:45,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 288 [2022-12-13 11:31:45,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:47,812 INFO L130 PetriNetUnfolder]: 3443/5924 cut-off events. [2022-12-13 11:31:47,812 INFO L131 PetriNetUnfolder]: For 143049/143516 co-relation queries the response was YES. [2022-12-13 11:31:47,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52346 conditions, 5924 events. 3443/5924 cut-off events. For 143049/143516 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 40223 event pairs, 729 based on Foata normal form. 607/6336 useless extension candidates. Maximal degree in co-relation 52209. Up to 2140 conditions per place. [2022-12-13 11:31:47,866 INFO L137 encePairwiseOnDemand]: 282/288 looper letters, 537 selfloop transitions, 16 changer transitions 208/809 dead transitions. [2022-12-13 11:31:47,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 809 transitions, 15203 flow [2022-12-13 11:31:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:31:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 11:31:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1052 transitions. [2022-12-13 11:31:47,869 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4565972222222222 [2022-12-13 11:31:47,869 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1052 transitions. [2022-12-13 11:31:47,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1052 transitions. [2022-12-13 11:31:47,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:47,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1052 transitions. [2022-12-13 11:31:47,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 131.5) internal successors, (1052), 8 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:47,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:47,872 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:47,872 INFO L175 Difference]: Start difference. First operand has 366 places, 878 transitions, 15246 flow. Second operand 8 states and 1052 transitions. [2022-12-13 11:31:47,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 809 transitions, 15203 flow [2022-12-13 11:31:48,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 809 transitions, 14588 flow, removed 149 selfloop flow, removed 16 redundant places. [2022-12-13 11:31:48,661 INFO L231 Difference]: Finished difference. Result has 346 places, 554 transitions, 8319 flow [2022-12-13 11:31:48,661 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=11858, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8319, PETRI_PLACES=346, PETRI_TRANSITIONS=554} [2022-12-13 11:31:48,662 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 316 predicate places. [2022-12-13 11:31:48,662 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 554 transitions, 8319 flow [2022-12-13 11:31:48,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 126.14285714285714) internal successors, (1766), 14 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:48,662 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:48,662 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:31:48,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 11:31:48,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:48,863 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:31:48,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:48,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1781468662, now seen corresponding path program 15 times [2022-12-13 11:31:48,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:48,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372882018] [2022-12-13 11:31:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:48,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:31:48,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:48,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372882018] [2022-12-13 11:31:48,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372882018] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:31:48,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176755229] [2022-12-13 11:31:48,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:31:48,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:48,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:31:48,982 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:31:48,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 11:31:49,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 11:31:49,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:31:49,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:31:49,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:31:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:31:49,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:31:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:31:49,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176755229] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:31:49,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:31:49,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-12-13 11:31:49,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814420975] [2022-12-13 11:31:49,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:31:49,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 11:31:49,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 11:31:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-12-13 11:31:49,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 288 [2022-12-13 11:31:49,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 554 transitions, 8319 flow. Second operand has 20 states, 20 states have (on average 119.0) internal successors, (2380), 20 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:49,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:49,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 288 [2022-12-13 11:31:49,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:51,557 INFO L130 PetriNetUnfolder]: 4196/6644 cut-off events. [2022-12-13 11:31:51,557 INFO L131 PetriNetUnfolder]: For 164347/164461 co-relation queries the response was YES. [2022-12-13 11:31:51,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60797 conditions, 6644 events. 4196/6644 cut-off events. For 164347/164461 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 39436 event pairs, 452 based on Foata normal form. 48/6673 useless extension candidates. Maximal degree in co-relation 60670. Up to 2245 conditions per place. [2022-12-13 11:31:51,629 INFO L137 encePairwiseOnDemand]: 280/288 looper letters, 606 selfloop transitions, 340 changer transitions 0/955 dead transitions. [2022-12-13 11:31:51,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 955 transitions, 16532 flow [2022-12-13 11:31:51,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 11:31:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 11:31:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2262 transitions. [2022-12-13 11:31:51,632 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4363425925925926 [2022-12-13 11:31:51,632 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2262 transitions. [2022-12-13 11:31:51,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2262 transitions. [2022-12-13 11:31:51,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:51,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2262 transitions. [2022-12-13 11:31:51,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 125.66666666666667) internal successors, (2262), 18 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) [2022-12-13 11:31:51,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 288.0) internal successors, (5472), 19 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:51,638 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 288.0) internal successors, (5472), 19 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:51,638 INFO L175 Difference]: Start difference. First operand has 346 places, 554 transitions, 8319 flow. Second operand 18 states and 2262 transitions. [2022-12-13 11:31:51,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 955 transitions, 16532 flow [2022-12-13 11:31:52,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 955 transitions, 15471 flow, removed 365 selfloop flow, removed 25 redundant places. [2022-12-13 11:31:52,482 INFO L231 Difference]: Finished difference. Result has 289 places, 673 transitions, 11022 flow [2022-12-13 11:31:52,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=7797, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11022, PETRI_PLACES=289, PETRI_TRANSITIONS=673} [2022-12-13 11:31:52,483 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 259 predicate places. [2022-12-13 11:31:52,483 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 673 transitions, 11022 flow [2022-12-13 11:31:52,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 119.0) internal successors, (2380), 20 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:52,483 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:52,483 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:31:52,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 11:31:52,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:52,685 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:31:52,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:52,685 INFO L85 PathProgramCache]: Analyzing trace with hash -227433082, now seen corresponding path program 16 times [2022-12-13 11:31:52,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:52,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198157727] [2022-12-13 11:31:52,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:52,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:31:52,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:52,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198157727] [2022-12-13 11:31:52,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198157727] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:31:52,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212619807] [2022-12-13 11:31:52,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:31:52,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:52,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:31:52,809 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:31:52,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 11:31:52,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:31:52,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:31:52,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:31:52,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:31:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:31:52,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:31:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:31:53,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212619807] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:31:53,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:31:53,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-12-13 11:31:53,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383548249] [2022-12-13 11:31:53,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:31:53,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 11:31:53,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:53,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 11:31:53,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-12-13 11:31:53,351 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 288 [2022-12-13 11:31:53,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 673 transitions, 11022 flow. Second operand has 19 states, 19 states have (on average 115.3157894736842) internal successors, (2191), 19 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:53,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:53,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 288 [2022-12-13 11:31:53,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:31:56,100 INFO L130 PetriNetUnfolder]: 4257/6738 cut-off events. [2022-12-13 11:31:56,100 INFO L131 PetriNetUnfolder]: For 162309/162309 co-relation queries the response was YES. [2022-12-13 11:31:56,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62199 conditions, 6738 events. 4257/6738 cut-off events. For 162309/162309 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 39587 event pairs, 203 based on Foata normal form. 34/6772 useless extension candidates. Maximal degree in co-relation 62084. Up to 2046 conditions per place. [2022-12-13 11:31:56,173 INFO L137 encePairwiseOnDemand]: 278/288 looper letters, 594 selfloop transitions, 479 changer transitions 0/1073 dead transitions. [2022-12-13 11:31:56,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 1073 transitions, 19753 flow [2022-12-13 11:31:56,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 11:31:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-13 11:31:56,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4450 transitions. [2022-12-13 11:31:56,177 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4176051051051051 [2022-12-13 11:31:56,177 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4450 transitions. [2022-12-13 11:31:56,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4450 transitions. [2022-12-13 11:31:56,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:31:56,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4450 transitions. [2022-12-13 11:31:56,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 120.27027027027027) internal successors, (4450), 37 states have internal predecessors, (4450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:56,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 288.0) internal successors, (10944), 38 states have internal predecessors, (10944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:56,187 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 288.0) internal successors, (10944), 38 states have internal predecessors, (10944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:56,187 INFO L175 Difference]: Start difference. First operand has 289 places, 673 transitions, 11022 flow. Second operand 37 states and 4450 transitions. [2022-12-13 11:31:56,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 1073 transitions, 19753 flow [2022-12-13 11:31:57,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1073 transitions, 18878 flow, removed 435 selfloop flow, removed 4 redundant places. [2022-12-13 11:31:57,312 INFO L231 Difference]: Finished difference. Result has 321 places, 772 transitions, 13281 flow [2022-12-13 11:31:57,312 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=10536, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=13281, PETRI_PLACES=321, PETRI_TRANSITIONS=772} [2022-12-13 11:31:57,312 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 291 predicate places. [2022-12-13 11:31:57,312 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 772 transitions, 13281 flow [2022-12-13 11:31:57,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 115.3157894736842) internal successors, (2191), 19 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:57,313 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:31:57,313 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:31:57,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 11:31:57,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:57,514 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:31:57,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:31:57,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1749843780, now seen corresponding path program 17 times [2022-12-13 11:31:57,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:31:57,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633483073] [2022-12-13 11:31:57,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:31:57,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:31:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:31:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:31:57,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:31:57,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633483073] [2022-12-13 11:31:57,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633483073] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:31:57,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025971795] [2022-12-13 11:31:57,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:31:57,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:31:57,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:31:57,615 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:31:57,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 11:31:57,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:31:57,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:31:57,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:31:57,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:31:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:31:57,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:31:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:31:57,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025971795] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:31:57,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:31:57,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2022-12-13 11:31:57,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680571666] [2022-12-13 11:31:57,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:31:57,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:31:57,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:31:57,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:31:57,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:31:58,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 288 [2022-12-13 11:31:58,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 772 transitions, 13281 flow. Second operand has 16 states, 16 states have (on average 115.9375) internal successors, (1855), 16 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:31:58,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:31:58,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 288 [2022-12-13 11:31:58,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:32:00,412 INFO L130 PetriNetUnfolder]: 4619/7266 cut-off events. [2022-12-13 11:32:00,412 INFO L131 PetriNetUnfolder]: For 172445/172445 co-relation queries the response was YES. [2022-12-13 11:32:00,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67371 conditions, 7266 events. 4619/7266 cut-off events. For 172445/172445 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 42630 event pairs, 456 based on Foata normal form. 80/7346 useless extension candidates. Maximal degree in co-relation 67257. Up to 2917 conditions per place. [2022-12-13 11:32:00,494 INFO L137 encePairwiseOnDemand]: 278/288 looper letters, 628 selfloop transitions, 361 changer transitions 0/989 dead transitions. [2022-12-13 11:32:00,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 989 transitions, 19005 flow [2022-12-13 11:32:00,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 11:32:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 11:32:00,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2285 transitions. [2022-12-13 11:32:00,497 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41758040935672514 [2022-12-13 11:32:00,497 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2285 transitions. [2022-12-13 11:32:00,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2285 transitions. [2022-12-13 11:32:00,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:32:00,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2285 transitions. [2022-12-13 11:32:00,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 120.26315789473684) internal successors, (2285), 19 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:00,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 288.0) internal successors, (5760), 20 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:00,502 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 288.0) internal successors, (5760), 20 states have internal predecessors, (5760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:00,502 INFO L175 Difference]: Start difference. First operand has 321 places, 772 transitions, 13281 flow. Second operand 19 states and 2285 transitions. [2022-12-13 11:32:00,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 989 transitions, 19005 flow [2022-12-13 11:32:01,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 989 transitions, 17565 flow, removed 410 selfloop flow, removed 12 redundant places. [2022-12-13 11:32:01,683 INFO L231 Difference]: Finished difference. Result has 328 places, 822 transitions, 14023 flow [2022-12-13 11:32:01,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=11713, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=14023, PETRI_PLACES=328, PETRI_TRANSITIONS=822} [2022-12-13 11:32:01,684 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 298 predicate places. [2022-12-13 11:32:01,684 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 822 transitions, 14023 flow [2022-12-13 11:32:01,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 115.9375) internal successors, (1855), 16 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:01,684 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:32:01,685 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:32:01,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 11:32:01,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 11:32:01,886 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:32:01,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:32:01,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1914410284, now seen corresponding path program 18 times [2022-12-13 11:32:01,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:32:01,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308300503] [2022-12-13 11:32:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:32:01,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:32:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:32:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:32:02,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:32:02,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308300503] [2022-12-13 11:32:02,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308300503] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:32:02,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989123107] [2022-12-13 11:32:02,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:32:02,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:32:02,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:32:02,004 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:32:02,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 11:32:02,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-13 11:32:02,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:32:02,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:32:02,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:32:02,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:32:02,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:32:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:32:02,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989123107] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:32:02,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:32:02,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-13 11:32:02,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240910318] [2022-12-13 11:32:02,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:32:02,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 11:32:02,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:32:02,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 11:32:02,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-12-13 11:32:02,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 288 [2022-12-13 11:32:02,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 822 transitions, 14023 flow. Second operand has 19 states, 19 states have (on average 119.15789473684211) internal successors, (2264), 19 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:02,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:32:02,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 288 [2022-12-13 11:32:02,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:32:04,544 INFO L130 PetriNetUnfolder]: 4501/7081 cut-off events. [2022-12-13 11:32:04,544 INFO L131 PetriNetUnfolder]: For 188276/188317 co-relation queries the response was YES. [2022-12-13 11:32:04,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67977 conditions, 7081 events. 4501/7081 cut-off events. For 188276/188317 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 41708 event pairs, 628 based on Foata normal form. 44/7111 useless extension candidates. Maximal degree in co-relation 67861. Up to 2968 conditions per place. [2022-12-13 11:32:04,625 INFO L137 encePairwiseOnDemand]: 280/288 looper letters, 602 selfloop transitions, 316 changer transitions 0/955 dead transitions. [2022-12-13 11:32:04,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 955 transitions, 17958 flow [2022-12-13 11:32:04,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:32:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:32:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1120 transitions. [2022-12-13 11:32:04,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2022-12-13 11:32:04,627 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1120 transitions. [2022-12-13 11:32:04,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1120 transitions. [2022-12-13 11:32:04,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:32:04,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1120 transitions. [2022-12-13 11:32:04,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 124.44444444444444) internal successors, (1120), 9 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:04,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 288.0) internal successors, (2880), 10 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:04,629 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 288.0) internal successors, (2880), 10 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:04,630 INFO L175 Difference]: Start difference. First operand has 328 places, 822 transitions, 14023 flow. Second operand 9 states and 1120 transitions. [2022-12-13 11:32:04,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 955 transitions, 17958 flow [2022-12-13 11:32:06,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 955 transitions, 17492 flow, removed 172 selfloop flow, removed 8 redundant places. [2022-12-13 11:32:06,024 INFO L231 Difference]: Finished difference. Result has 327 places, 815 transitions, 14206 flow [2022-12-13 11:32:06,024 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=13574, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14206, PETRI_PLACES=327, PETRI_TRANSITIONS=815} [2022-12-13 11:32:06,025 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 297 predicate places. [2022-12-13 11:32:06,025 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 815 transitions, 14206 flow [2022-12-13 11:32:06,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 119.15789473684211) internal successors, (2264), 19 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:06,025 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:32:06,025 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:32:06,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 11:32:06,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 11:32:06,226 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:32:06,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:32:06,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1360572624, now seen corresponding path program 19 times [2022-12-13 11:32:06,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:32:06,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334242308] [2022-12-13 11:32:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:32:06,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:32:06,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:32:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:32:06,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:32:06,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334242308] [2022-12-13 11:32:06,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334242308] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:32:06,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411293177] [2022-12-13 11:32:06,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:32:06,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:32:06,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:32:06,359 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:32:06,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 11:32:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:32:06,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:32:06,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:32:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:32:06,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:32:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:32:06,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411293177] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:32:06,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:32:06,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-12-13 11:32:06,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474462450] [2022-12-13 11:32:06,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:32:06,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 11:32:06,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:32:06,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 11:32:06,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-12-13 11:32:07,098 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 288 [2022-12-13 11:32:07,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 815 transitions, 14206 flow. Second operand has 21 states, 21 states have (on average 119.04761904761905) internal successors, (2500), 21 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:07,100 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:32:07,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 288 [2022-12-13 11:32:07,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:32:09,251 INFO L130 PetriNetUnfolder]: 4557/7166 cut-off events. [2022-12-13 11:32:09,251 INFO L131 PetriNetUnfolder]: For 197806/197841 co-relation queries the response was YES. [2022-12-13 11:32:09,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69747 conditions, 7166 events. 4557/7166 cut-off events. For 197806/197841 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42202 event pairs, 826 based on Foata normal form. 58/7215 useless extension candidates. Maximal degree in co-relation 69634. Up to 3482 conditions per place. [2022-12-13 11:32:09,331 INFO L137 encePairwiseOnDemand]: 280/288 looper letters, 574 selfloop transitions, 343 changer transitions 0/954 dead transitions. [2022-12-13 11:32:09,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 954 transitions, 18236 flow [2022-12-13 11:32:09,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 11:32:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 11:32:09,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1253 transitions. [2022-12-13 11:32:09,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43506944444444445 [2022-12-13 11:32:09,333 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1253 transitions. [2022-12-13 11:32:09,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1253 transitions. [2022-12-13 11:32:09,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:32:09,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1253 transitions. [2022-12-13 11:32:09,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 125.3) internal successors, (1253), 10 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:09,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 288.0) internal successors, (3168), 11 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:09,336 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 288.0) internal successors, (3168), 11 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:09,336 INFO L175 Difference]: Start difference. First operand has 327 places, 815 transitions, 14206 flow. Second operand 10 states and 1253 transitions. [2022-12-13 11:32:09,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 954 transitions, 18236 flow [2022-12-13 11:32:10,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 954 transitions, 17872 flow, removed 13 selfloop flow, removed 6 redundant places. [2022-12-13 11:32:10,716 INFO L231 Difference]: Finished difference. Result has 333 places, 858 transitions, 15939 flow [2022-12-13 11:32:10,717 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=13753, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15939, PETRI_PLACES=333, PETRI_TRANSITIONS=858} [2022-12-13 11:32:10,717 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 303 predicate places. [2022-12-13 11:32:10,717 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 858 transitions, 15939 flow [2022-12-13 11:32:10,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 119.04761904761905) internal successors, (2500), 21 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:10,717 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:32:10,718 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:32:10,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 11:32:10,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 11:32:10,918 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:32:10,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:32:10,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1870695612, now seen corresponding path program 20 times [2022-12-13 11:32:10,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:32:10,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056318179] [2022-12-13 11:32:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:32:10,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:32:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:32:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:32:11,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:32:11,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056318179] [2022-12-13 11:32:11,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056318179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:32:11,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012930731] [2022-12-13 11:32:11,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:32:11,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:32:11,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:32:11,036 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:32:11,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 11:32:11,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:32:11,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:32:11,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:32:11,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:32:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:32:11,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:32:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:32:11,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012930731] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:32:11,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:32:11,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-13 11:32:11,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764644917] [2022-12-13 11:32:11,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:32:11,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 11:32:11,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:32:11,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 11:32:11,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-12-13 11:32:11,563 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 288 [2022-12-13 11:32:11,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 858 transitions, 15939 flow. Second operand has 19 states, 19 states have (on average 119.05263157894737) internal successors, (2262), 19 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) [2022-12-13 11:32:11,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:32:11,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 288 [2022-12-13 11:32:11,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:32:13,697 INFO L130 PetriNetUnfolder]: 4523/7097 cut-off events. [2022-12-13 11:32:13,697 INFO L131 PetriNetUnfolder]: For 214025/214062 co-relation queries the response was YES. [2022-12-13 11:32:13,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71247 conditions, 7097 events. 4523/7097 cut-off events. For 214025/214062 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 41539 event pairs, 914 based on Foata normal form. 79/7169 useless extension candidates. Maximal degree in co-relation 71130. Up to 3687 conditions per place. [2022-12-13 11:32:13,777 INFO L137 encePairwiseOnDemand]: 280/288 looper letters, 602 selfloop transitions, 280 changer transitions 0/919 dead transitions. [2022-12-13 11:32:13,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 919 transitions, 18549 flow [2022-12-13 11:32:13,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:32:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:32:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1121 transitions. [2022-12-13 11:32:13,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4324845679012346 [2022-12-13 11:32:13,778 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1121 transitions. [2022-12-13 11:32:13,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1121 transitions. [2022-12-13 11:32:13,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:32:13,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1121 transitions. [2022-12-13 11:32:13,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 124.55555555555556) internal successors, (1121), 9 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:13,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 288.0) internal successors, (2880), 10 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:13,781 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 288.0) internal successors, (2880), 10 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:13,781 INFO L175 Difference]: Start difference. First operand has 333 places, 858 transitions, 15939 flow. Second operand 9 states and 1121 transitions. [2022-12-13 11:32:13,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 919 transitions, 18549 flow [2022-12-13 11:32:15,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 919 transitions, 18320 flow, removed 35 selfloop flow, removed 6 redundant places. [2022-12-13 11:32:15,269 INFO L231 Difference]: Finished difference. Result has 332 places, 856 transitions, 16497 flow [2022-12-13 11:32:15,269 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=15439, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=843, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16497, PETRI_PLACES=332, PETRI_TRANSITIONS=856} [2022-12-13 11:32:15,269 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 302 predicate places. [2022-12-13 11:32:15,270 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 856 transitions, 16497 flow [2022-12-13 11:32:15,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 119.05263157894737) internal successors, (2262), 19 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) [2022-12-13 11:32:15,270 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:32:15,270 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:32:15,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 11:32:15,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 11:32:15,471 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:32:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:32:15,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1211652796, now seen corresponding path program 21 times [2022-12-13 11:32:15,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:32:15,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18239679] [2022-12-13 11:32:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:32:15,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:32:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:32:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:32:15,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:32:15,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18239679] [2022-12-13 11:32:15,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18239679] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:32:15,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34537583] [2022-12-13 11:32:15,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:32:15,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:32:15,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:32:15,592 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:32:15,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 11:32:15,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 11:32:15,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:32:15,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:32:15,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:32:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:32:15,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:32:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:32:15,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34537583] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:32:15,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:32:15,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-12-13 11:32:15,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100590575] [2022-12-13 11:32:15,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:32:15,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 11:32:15,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:32:15,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 11:32:15,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-12-13 11:32:16,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 288 [2022-12-13 11:32:16,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 856 transitions, 16497 flow. Second operand has 19 states, 19 states have (on average 119.15789473684211) internal successors, (2264), 19 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:16,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:32:16,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 288 [2022-12-13 11:32:16,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:32:18,505 INFO L130 PetriNetUnfolder]: 4492/7013 cut-off events. [2022-12-13 11:32:18,506 INFO L131 PetriNetUnfolder]: For 210604/210645 co-relation queries the response was YES. [2022-12-13 11:32:18,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71460 conditions, 7013 events. 4492/7013 cut-off events. For 210604/210645 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 40674 event pairs, 1011 based on Foata normal form. 32/7027 useless extension candidates. Maximal degree in co-relation 71343. Up to 5125 conditions per place. [2022-12-13 11:32:18,593 INFO L137 encePairwiseOnDemand]: 280/288 looper letters, 635 selfloop transitions, 258 changer transitions 0/929 dead transitions. [2022-12-13 11:32:18,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 929 transitions, 19116 flow [2022-12-13 11:32:18,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:32:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 11:32:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1114 transitions. [2022-12-13 11:32:18,595 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42978395061728397 [2022-12-13 11:32:18,595 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1114 transitions. [2022-12-13 11:32:18,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1114 transitions. [2022-12-13 11:32:18,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:32:18,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1114 transitions. [2022-12-13 11:32:18,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 123.77777777777777) internal successors, (1114), 9 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:18,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 288.0) internal successors, (2880), 10 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:18,598 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 288.0) internal successors, (2880), 10 states have internal predecessors, (2880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:18,598 INFO L175 Difference]: Start difference. First operand has 332 places, 856 transitions, 16497 flow. Second operand 9 states and 1114 transitions. [2022-12-13 11:32:18,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 929 transitions, 19116 flow [2022-12-13 11:32:19,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 929 transitions, 18758 flow, removed 39 selfloop flow, removed 5 redundant places. [2022-12-13 11:32:19,966 INFO L231 Difference]: Finished difference. Result has 336 places, 853 transitions, 16610 flow [2022-12-13 11:32:19,966 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=16007, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16610, PETRI_PLACES=336, PETRI_TRANSITIONS=853} [2022-12-13 11:32:19,966 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 306 predicate places. [2022-12-13 11:32:19,966 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 853 transitions, 16610 flow [2022-12-13 11:32:19,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 119.15789473684211) internal successors, (2264), 19 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:19,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:32:19,967 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:32:19,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 11:32:20,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:32:20,168 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:32:20,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:32:20,169 INFO L85 PathProgramCache]: Analyzing trace with hash 178640180, now seen corresponding path program 22 times [2022-12-13 11:32:20,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:32:20,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612911179] [2022-12-13 11:32:20,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:32:20,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:32:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:32:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:32:20,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:32:20,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612911179] [2022-12-13 11:32:20,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612911179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:32:20,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890405928] [2022-12-13 11:32:20,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:32:20,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:32:20,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:32:20,269 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:32:20,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 11:32:20,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:32:20,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:32:20,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 11:32:20,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:32:20,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:32:20,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:32:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:32:20,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890405928] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:32:20,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:32:20,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-12-13 11:32:20,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417467528] [2022-12-13 11:32:20,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:32:20,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:32:20,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:32:20,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:32:20,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:32:20,827 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 288 [2022-12-13 11:32:20,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 853 transitions, 16610 flow. Second operand has 18 states, 18 states have (on average 115.77777777777777) internal successors, (2084), 18 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:20,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:32:20,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 288 [2022-12-13 11:32:20,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:32:23,905 INFO L130 PetriNetUnfolder]: 4508/6973 cut-off events. [2022-12-13 11:32:23,905 INFO L131 PetriNetUnfolder]: For 207633/207633 co-relation queries the response was YES. [2022-12-13 11:32:23,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71353 conditions, 6973 events. 4508/6973 cut-off events. For 207633/207633 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 39571 event pairs, 417 based on Foata normal form. 42/7015 useless extension candidates. Maximal degree in co-relation 71235. Up to 2888 conditions per place. [2022-12-13 11:32:23,981 INFO L137 encePairwiseOnDemand]: 278/288 looper letters, 534 selfloop transitions, 500 changer transitions 0/1034 dead transitions. [2022-12-13 11:32:23,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1034 transitions, 21326 flow [2022-12-13 11:32:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 11:32:23,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-13 11:32:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3704 transitions. [2022-12-13 11:32:23,985 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41487455197132617 [2022-12-13 11:32:23,985 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3704 transitions. [2022-12-13 11:32:23,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3704 transitions. [2022-12-13 11:32:23,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:32:23,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3704 transitions. [2022-12-13 11:32:23,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 119.48387096774194) internal successors, (3704), 31 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:23,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 288.0) internal successors, (9216), 32 states have internal predecessors, (9216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:23,993 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 288.0) internal successors, (9216), 32 states have internal predecessors, (9216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:23,993 INFO L175 Difference]: Start difference. First operand has 336 places, 853 transitions, 16610 flow. Second operand 31 states and 3704 transitions. [2022-12-13 11:32:23,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1034 transitions, 21326 flow [2022-12-13 11:32:25,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1034 transitions, 20739 flow, removed 31 selfloop flow, removed 11 redundant places. [2022-12-13 11:32:25,381 INFO L231 Difference]: Finished difference. Result has 357 places, 865 transitions, 17602 flow [2022-12-13 11:32:25,381 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=15706, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=17602, PETRI_PLACES=357, PETRI_TRANSITIONS=865} [2022-12-13 11:32:25,382 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 327 predicate places. [2022-12-13 11:32:25,382 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 865 transitions, 17602 flow [2022-12-13 11:32:25,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 115.77777777777777) internal successors, (2084), 18 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:32:25,382 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:32:25,382 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:32:25,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-13 11:32:25,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 11:32:25,584 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-13 11:32:25,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:32:25,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1184087958, now seen corresponding path program 23 times [2022-12-13 11:32:25,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:32:25,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690386548] [2022-12-13 11:32:25,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:32:25,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:32:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:32:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:32:26,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:32:26,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690386548] [2022-12-13 11:32:26,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690386548] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:32:26,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329200433] [2022-12-13 11:32:26,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:32:26,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:32:26,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:32:26,437 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:32:26,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29d4843b-b53c-4276-a448-2291c8c7181d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 11:32:26,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:32:26,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:32:26,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 11:32:26,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:32:27,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:32:27,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:32:27,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 108 [2022-12-13 11:32:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:32:27,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:32:32,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:32:32,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 509 treesize of output 2083 [2022-12-13 11:33:43,864 WARN L718 sPolynomialRelations]: Constructing 8192(two to the power of 13 dual juncts. [2022-12-13 11:38:39,768 WARN L718 sPolynomialRelations]: Constructing 16384(two to the power of 14 dual juncts. [2022-12-13 11:38:47,855 WARN L233 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 601 DAG size of output: 511 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-13 11:39:14,411 WARN L718 sPolynomialRelations]: Constructing 32768(two to the power of 15 dual juncts. [2022-12-13 11:39:24,813 WARN L233 SmtUtils]: Spent 7.70s on a formula simplification. DAG size of input: 619 DAG size of output: 511 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-13 11:39:52,690 WARN L718 sPolynomialRelations]: Constructing 16384(two to the power of 14 dual juncts. [2022-12-13 11:40:12,739 WARN L718 sPolynomialRelations]: Constructing 16384(two to the power of 14 dual juncts. [2022-12-13 11:40:19,947 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 602 DAG size of output: 512 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)