./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/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_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/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_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/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 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --- 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 16:33:46,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:33:46,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:33:46,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:33:46,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:33:46,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:33:46,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:33:46,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:33:46,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:33:46,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:33:46,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:33:46,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:33:46,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:33:46,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:33:46,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:33:46,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:33:46,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:33:46,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:33:46,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:33:46,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:33:46,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:33:46,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:33:46,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:33:46,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:33:46,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:33:46,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:33:46,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:33:46,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:33:46,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:33:46,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:33:46,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:33:46,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:33:46,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:33:46,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:33:46,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:33:46,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:33:46,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:33:46,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:33:46,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:33:46,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:33:46,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:33:46,594 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:33:46,607 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:33:46,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:33:46,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:33:46,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:33:46,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:33:46,608 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:33:46,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:33:46,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:33:46,608 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:33:46,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:33:46,609 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:33:46,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:33:46,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:33:46,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:33:46,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:33:46,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:33:46,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:33:46,610 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:33:46,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:33:46,610 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:33:46,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:33:46,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:33:46,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:33:46,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:33:46,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:33:46,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:33:46,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:33:46,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:33:46,611 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:33:46,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:33:46,612 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:33:46,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:33:46,612 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:33:46,612 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:33:46,612 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:33:46,612 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_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 [2022-12-13 16:33:46,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:33:46,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:33:46,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:33:46,803 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:33:46,804 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:33:46,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2022-12-13 16:33:49,384 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:33:49,595 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:33:49,596 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2022-12-13 16:33:49,608 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/data/7e5aec68c/7ab0b3b6edc84e87bf83dade3eabe038/FLAGf2ff4a214 [2022-12-13 16:33:49,622 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/data/7e5aec68c/7ab0b3b6edc84e87bf83dade3eabe038 [2022-12-13 16:33:49,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:33:49,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:33:49,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:33:49,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:33:49,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:33:49,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:33:49" (1/1) ... [2022-12-13 16:33:49,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e1310e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:33:49, skipping insertion in model container [2022-12-13 16:33:49,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:33:49" (1/1) ... [2022-12-13 16:33:49,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:33:49,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:33:50,026 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_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i[41323,41336] [2022-12-13 16:33:50,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:33:50,062 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:33:50,094 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_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i[41323,41336] [2022-12-13 16:33:50,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:33:50,143 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:33:50,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:33:50 WrapperNode [2022-12-13 16:33:50,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:33:50,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:33:50,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:33:50,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:33:50,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:33:50" (1/1) ... [2022-12-13 16:33:50,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:33:50" (1/1) ... [2022-12-13 16:33:50,187 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 186 [2022-12-13 16:33:50,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:33:50,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:33:50,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:33:50,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:33:50,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:33:50" (1/1) ... [2022-12-13 16:33:50,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:33:50" (1/1) ... [2022-12-13 16:33:50,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:33:50" (1/1) ... [2022-12-13 16:33:50,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:33:50" (1/1) ... [2022-12-13 16:33:50,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:33:50" (1/1) ... [2022-12-13 16:33:50,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:33:50" (1/1) ... [2022-12-13 16:33:50,214 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:33:50" (1/1) ... [2022-12-13 16:33:50,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:33:50" (1/1) ... [2022-12-13 16:33:50,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:33:50,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:33:50,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:33:50,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:33:50,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:33:50" (1/1) ... [2022-12-13 16:33:50,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:33:50,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:33:50,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:33:50,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:33:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:33:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:33:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:33:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:33:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 16:33:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:33:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 16:33:50,290 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 16:33:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:33:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:33:50,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:33:50,291 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 16:33:50,432 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:33:50,434 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:33:50,663 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:33:50,671 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:33:50,671 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-12-13 16:33:50,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:33:50 BoogieIcfgContainer [2022-12-13 16:33:50,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:33:50,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:33:50,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:33:50,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:33:50,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:33:49" (1/3) ... [2022-12-13 16:33:50,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22975f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:33:50, skipping insertion in model container [2022-12-13 16:33:50,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:33:50" (2/3) ... [2022-12-13 16:33:50,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22975f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:33:50, skipping insertion in model container [2022-12-13 16:33:50,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:33:50" (3/3) ... [2022-12-13 16:33:50,682 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2022-12-13 16:33:50,691 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 16:33:50,699 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:33:50,699 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 16:33:50,699 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 16:33:50,759 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 16:33:50,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 197 transitions, 402 flow [2022-12-13 16:33:50,875 INFO L130 PetriNetUnfolder]: 45/269 cut-off events. [2022-12-13 16:33:50,875 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-12-13 16:33:50,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 269 events. 45/269 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 853 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2022-12-13 16:33:50,882 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 197 transitions, 402 flow [2022-12-13 16:33:50,889 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 192 transitions, 389 flow [2022-12-13 16:33:50,893 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:33:50,903 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 192 transitions, 389 flow [2022-12-13 16:33:50,905 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 192 transitions, 389 flow [2022-12-13 16:33:50,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 192 transitions, 389 flow [2022-12-13 16:33:50,949 INFO L130 PetriNetUnfolder]: 44/264 cut-off events. [2022-12-13 16:33:50,950 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:33:50,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 264 events. 44/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 820 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2022-12-13 16:33:50,962 INFO L119 LiptonReduction]: Number of co-enabled transitions 10920 [2022-12-13 16:33:53,254 INFO L134 LiptonReduction]: Checked pairs total: 17377 [2022-12-13 16:33:53,254 INFO L136 LiptonReduction]: Total number of compositions: 162 [2022-12-13 16:33:53,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:33:53,271 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;@4add4db8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:33:53,271 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 16:33:53,274 INFO L130 PetriNetUnfolder]: 7/25 cut-off events. [2022-12-13 16:33:53,274 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:33:53,274 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:33:53,275 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:33:53,275 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 16:33:53,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:53,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1509455897, now seen corresponding path program 1 times [2022-12-13 16:33:53,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:53,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181308186] [2022-12-13 16:33:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:53,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:53,468 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 16:33:53,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:53,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181308186] [2022-12-13 16:33:53,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181308186] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:33:53,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:33:53,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:33:53,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439309877] [2022-12-13 16:33:53,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:33:53,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:33:53,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:53,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:33:53,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:33:53,508 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 359 [2022-12-13 16:33:53,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:53,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:33:53,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 359 [2022-12-13 16:33:53,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:33:53,641 INFO L130 PetriNetUnfolder]: 322/705 cut-off events. [2022-12-13 16:33:53,641 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:33:53,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 705 events. 322/705 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3462 event pairs, 285 based on Foata normal form. 91/682 useless extension candidates. Maximal degree in co-relation 1281. Up to 627 conditions per place. [2022-12-13 16:33:53,644 INFO L137 encePairwiseOnDemand]: 335/359 looper letters, 37 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2022-12-13 16:33:53,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 175 flow [2022-12-13 16:33:53,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:33:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:33:53,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2022-12-13 16:33:53,655 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5078922934076138 [2022-12-13 16:33:53,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2022-12-13 16:33:53,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2022-12-13 16:33:53,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:33:53,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2022-12-13 16:33:53,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:53,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:53,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:53,674 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 547 transitions. [2022-12-13 16:33:53,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 175 flow [2022-12-13 16:33:53,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 175 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:33:53,678 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 107 flow [2022-12-13 16:33:53,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2022-12-13 16:33:53,682 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2022-12-13 16:33:53,682 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 107 flow [2022-12-13 16:33:53,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:53,683 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:33:53,683 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:33:53,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:33:53,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 16:33:53,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:53,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1191534850, now seen corresponding path program 1 times [2022-12-13 16:33:53,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:53,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752026472] [2022-12-13 16:33:53,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:53,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:33:53,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:53,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752026472] [2022-12-13 16:33:53,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752026472] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:53,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446137312] [2022-12-13 16:33:53,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:53,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:53,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:33:53,756 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:33:53,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:33:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:53,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 16:33:53,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:33:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:33:53,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:33:53,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446137312] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:33:53,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:33:53,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 16:33:53,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253495442] [2022-12-13 16:33:53,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:33:53,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:33:53,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:53,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:33:53,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:33:53,845 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 359 [2022-12-13 16:33:53,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:53,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:33:53,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 359 [2022-12-13 16:33:53,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:33:53,985 INFO L130 PetriNetUnfolder]: 321/695 cut-off events. [2022-12-13 16:33:53,985 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:33:53,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 695 events. 321/695 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3435 event pairs, 126 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 1314. Up to 593 conditions per place. [2022-12-13 16:33:53,988 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 53 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2022-12-13 16:33:53,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 249 flow [2022-12-13 16:33:53,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:33:53,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:33:53,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2022-12-13 16:33:53,991 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5023212627669452 [2022-12-13 16:33:53,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2022-12-13 16:33:53,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2022-12-13 16:33:53,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:33:53,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2022-12-13 16:33:53,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:53,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:53,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:53,997 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 107 flow. Second operand 3 states and 541 transitions. [2022-12-13 16:33:53,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 249 flow [2022-12-13 16:33:53,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 245 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 16:33:53,999 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 111 flow [2022-12-13 16:33:53,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2022-12-13 16:33:53,999 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2022-12-13 16:33:54,000 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 111 flow [2022-12-13 16:33:54,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:54,000 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:33:54,000 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 16:33:54,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:33:54,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:54,202 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 16:33:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:54,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1691969618, now seen corresponding path program 1 times [2022-12-13 16:33:54,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:54,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543847551] [2022-12-13 16:33:54,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:54,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:54,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:33:54,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:54,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543847551] [2022-12-13 16:33:54,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543847551] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:54,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072282505] [2022-12-13 16:33:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:54,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:54,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:33:54,381 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:33:54,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:33:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:54,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:33:54,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:33:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:33:54,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:33:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:33:54,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072282505] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:33:54,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:33:54,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 16:33:54,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851092033] [2022-12-13 16:33:54,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:33:54,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:33:54,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:54,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:33:54,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:33:54,498 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 359 [2022-12-13 16:33:54,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 111 flow. Second operand has 7 states, 7 states have (on average 162.57142857142858) internal successors, (1138), 7 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:54,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:33:54,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 359 [2022-12-13 16:33:54,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:33:54,643 INFO L130 PetriNetUnfolder]: 320/687 cut-off events. [2022-12-13 16:33:54,644 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-12-13 16:33:54,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 687 events. 320/687 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3275 event pairs, 285 based on Foata normal form. 3/596 useless extension candidates. Maximal degree in co-relation 1338. Up to 610 conditions per place. [2022-12-13 16:33:54,646 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 37 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2022-12-13 16:33:54,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 207 flow [2022-12-13 16:33:54,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:33:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:33:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1011 transitions. [2022-12-13 16:33:54,648 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46935933147632314 [2022-12-13 16:33:54,648 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1011 transitions. [2022-12-13 16:33:54,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1011 transitions. [2022-12-13 16:33:54,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:33:54,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1011 transitions. [2022-12-13 16:33:54,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 168.5) internal successors, (1011), 6 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:54,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:54,652 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 359.0) internal successors, (2513), 7 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:54,653 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 111 flow. Second operand 6 states and 1011 transitions. [2022-12-13 16:33:54,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 207 flow [2022-12-13 16:33:54,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 49 transitions, 203 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 16:33:54,654 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 143 flow [2022-12-13 16:33:54,654 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=143, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2022-12-13 16:33:54,654 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2022-12-13 16:33:54,655 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 143 flow [2022-12-13 16:33:54,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 162.57142857142858) internal successors, (1138), 7 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:54,655 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:33:54,655 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-12-13 16:33:54,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:33:54,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:54,856 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 16:33:54,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:54,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2037631319, now seen corresponding path program 2 times [2022-12-13 16:33:54,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:54,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716652689] [2022-12-13 16:33:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:54,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:33:54,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:54,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716652689] [2022-12-13 16:33:54,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716652689] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:54,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563637131] [2022-12-13 16:33:54,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:33:54,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:54,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:33:54,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:33:54,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:33:55,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:33:55,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:33:55,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:33:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:33:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:33:55,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:33:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:33:55,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563637131] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:33:55,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:33:55,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 16:33:55,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998527285] [2022-12-13 16:33:55,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:33:55,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 16:33:55,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:55,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 16:33:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:33:55,097 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 359 [2022-12-13 16:33:55,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 143 flow. Second operand has 13 states, 13 states have (on average 162.30769230769232) internal successors, (2110), 13 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:55,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:33:55,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 359 [2022-12-13 16:33:55,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:33:55,260 INFO L130 PetriNetUnfolder]: 320/693 cut-off events. [2022-12-13 16:33:55,261 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-12-13 16:33:55,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1387 conditions, 693 events. 320/693 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3292 event pairs, 285 based on Foata normal form. 6/605 useless extension candidates. Maximal degree in co-relation 1328. Up to 610 conditions per place. [2022-12-13 16:33:55,264 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 37 selfloop transitions, 11 changer transitions 0/55 dead transitions. [2022-12-13 16:33:55,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 275 flow [2022-12-13 16:33:55,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:33:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 16:33:55,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1986 transitions. [2022-12-13 16:33:55,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4610027855153203 [2022-12-13 16:33:55,268 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1986 transitions. [2022-12-13 16:33:55,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1986 transitions. [2022-12-13 16:33:55,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:33:55,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1986 transitions. [2022-12-13 16:33:55,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 165.5) internal successors, (1986), 12 states have internal predecessors, (1986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:55,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:55,278 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 359.0) internal successors, (4667), 13 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:55,278 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 143 flow. Second operand 12 states and 1986 transitions. [2022-12-13 16:33:55,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 275 flow [2022-12-13 16:33:55,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 261 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 16:33:55,282 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 213 flow [2022-12-13 16:33:55,282 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=213, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2022-12-13 16:33:55,283 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 27 predicate places. [2022-12-13 16:33:55,283 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 213 flow [2022-12-13 16:33:55,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 162.30769230769232) internal successors, (2110), 13 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:55,285 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:33:55,285 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-12-13 16:33:55,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:33:55,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:55,485 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 16:33:55,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:55,486 INFO L85 PathProgramCache]: Analyzing trace with hash 281073527, now seen corresponding path program 3 times [2022-12-13 16:33:55,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:55,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284871333] [2022-12-13 16:33:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:55,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:33:55,516 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 16:33:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:33:55,549 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 16:33:55,549 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 16:33:55,550 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 16:33:55,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 16:33:55,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 16:33:55,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 16:33:55,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:33:55,553 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-12-13 16:33:55,555 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 16:33:55,555 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 16:33:55,579 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 16:33:55,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2022-12-13 16:33:55,621 INFO L130 PetriNetUnfolder]: 75/438 cut-off events. [2022-12-13 16:33:55,621 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-12-13 16:33:55,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 438 events. 75/438 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1742 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2022-12-13 16:33:55,623 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 269 transitions, 556 flow [2022-12-13 16:33:55,625 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 269 transitions, 556 flow [2022-12-13 16:33:55,625 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:33:55,626 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 229 places, 269 transitions, 556 flow [2022-12-13 16:33:55,626 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 229 places, 269 transitions, 556 flow [2022-12-13 16:33:55,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 269 transitions, 556 flow [2022-12-13 16:33:55,666 INFO L130 PetriNetUnfolder]: 75/438 cut-off events. [2022-12-13 16:33:55,666 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-12-13 16:33:55,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 438 events. 75/438 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1742 event pairs, 0 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 271. Up to 12 conditions per place. [2022-12-13 16:33:55,679 INFO L119 LiptonReduction]: Number of co-enabled transitions 33180 [2022-12-13 16:33:58,263 INFO L134 LiptonReduction]: Checked pairs total: 56073 [2022-12-13 16:33:58,263 INFO L136 LiptonReduction]: Total number of compositions: 226 [2022-12-13 16:33:58,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:33:58,265 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;@4add4db8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:33:58,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 16:33:58,266 INFO L130 PetriNetUnfolder]: 7/23 cut-off events. [2022-12-13 16:33:58,267 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:33:58,267 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:33:58,267 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:33:58,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 16:33:58,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:58,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1187084905, now seen corresponding path program 1 times [2022-12-13 16:33:58,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:58,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780308677] [2022-12-13 16:33:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:58,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:58,286 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 16:33:58,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:58,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780308677] [2022-12-13 16:33:58,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780308677] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:33:58,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:33:58,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:33:58,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56379587] [2022-12-13 16:33:58,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:33:58,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:33:58,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:58,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:33:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:33:58,295 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 495 [2022-12-13 16:33:58,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:58,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:33:58,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 495 [2022-12-13 16:33:58,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:33:59,278 INFO L130 PetriNetUnfolder]: 9850/15331 cut-off events. [2022-12-13 16:33:59,278 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-12-13 16:33:59,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29854 conditions, 15331 events. 9850/15331 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 100038 event pairs, 9172 based on Foata normal form. 3033/15939 useless extension candidates. Maximal degree in co-relation 12903. Up to 14424 conditions per place. [2022-12-13 16:33:59,321 INFO L137 encePairwiseOnDemand]: 461/495 looper letters, 55 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2022-12-13 16:33:59,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 272 flow [2022-12-13 16:33:59,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:33:59,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:33:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 746 transitions. [2022-12-13 16:33:59,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5023569023569023 [2022-12-13 16:33:59,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 746 transitions. [2022-12-13 16:33:59,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 746 transitions. [2022-12-13 16:33:59,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:33:59,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 746 transitions. [2022-12-13 16:33:59,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:59,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:59,326 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:59,326 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 746 transitions. [2022-12-13 16:33:59,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 272 flow [2022-12-13 16:33:59,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:33:59,328 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 168 flow [2022-12-13 16:33:59,328 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2022-12-13 16:33:59,329 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2022-12-13 16:33:59,329 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 168 flow [2022-12-13 16:33:59,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:59,329 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:33:59,329 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:33:59,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 16:33:59,329 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 16:33:59,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:33:59,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1279435676, now seen corresponding path program 1 times [2022-12-13 16:33:59,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:33:59,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757585159] [2022-12-13 16:33:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:59,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:33:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:59,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:33:59,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:33:59,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757585159] [2022-12-13 16:33:59,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757585159] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:33:59,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577332231] [2022-12-13 16:33:59,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:33:59,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:33:59,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:33:59,381 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:33:59,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:33:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:33:59,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 16:33:59,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:33:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:33:59,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:33:59,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577332231] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:33:59,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:33:59,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 16:33:59,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108046479] [2022-12-13 16:33:59,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:33:59,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:33:59,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:33:59,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:33:59,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:33:59,466 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 495 [2022-12-13 16:33:59,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:33:59,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:33:59,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 495 [2022-12-13 16:33:59,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:34:00,507 INFO L130 PetriNetUnfolder]: 9700/15333 cut-off events. [2022-12-13 16:34:00,507 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-12-13 16:34:00,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29865 conditions, 15333 events. 9700/15333 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 103279 event pairs, 4384 based on Foata normal form. 0/12909 useless extension candidates. Maximal degree in co-relation 29852. Up to 14394 conditions per place. [2022-12-13 16:34:00,567 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 71 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2022-12-13 16:34:00,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 86 transitions, 346 flow [2022-12-13 16:34:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:34:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:34:00,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 730 transitions. [2022-12-13 16:34:00,569 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49158249158249157 [2022-12-13 16:34:00,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 730 transitions. [2022-12-13 16:34:00,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 730 transitions. [2022-12-13 16:34:00,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:34:00,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 730 transitions. [2022-12-13 16:34:00,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:00,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:00,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 495.0) internal successors, (1980), 4 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:00,571 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 168 flow. Second operand 3 states and 730 transitions. [2022-12-13 16:34:00,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 86 transitions, 346 flow [2022-12-13 16:34:00,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 86 transitions, 342 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 16:34:00,573 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 176 flow [2022-12-13 16:34:00,573 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2022-12-13 16:34:00,573 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2022-12-13 16:34:00,574 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 176 flow [2022-12-13 16:34:00,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:00,574 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:34:00,574 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:34:00,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:34:00,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 16:34:00,775 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 16:34:00,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:34:00,776 INFO L85 PathProgramCache]: Analyzing trace with hash 827475966, now seen corresponding path program 1 times [2022-12-13 16:34:00,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:34:00,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336975140] [2022-12-13 16:34:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:34:00,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:34:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:34:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:34:00,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:34:00,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336975140] [2022-12-13 16:34:00,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336975140] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:34:00,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446370808] [2022-12-13 16:34:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:34:00,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:34:00,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:34:00,855 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:34:00,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:34:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:34:00,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:34:00,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:34:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:34:00,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:34:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:34:00,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446370808] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:34:00,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:34:00,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 16:34:00,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890722204] [2022-12-13 16:34:00,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:34:00,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:34:00,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:34:00,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:34:00,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:34:00,955 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 495 [2022-12-13 16:34:00,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 219.85714285714286) internal successors, (1539), 7 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:00,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:34:00,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 495 [2022-12-13 16:34:00,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:34:01,976 INFO L130 PetriNetUnfolder]: 9952/15468 cut-off events. [2022-12-13 16:34:01,976 INFO L131 PetriNetUnfolder]: For 640/640 co-relation queries the response was YES. [2022-12-13 16:34:01,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30545 conditions, 15468 events. 9952/15468 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 100520 event pairs, 9172 based on Foata normal form. 3/13278 useless extension candidates. Maximal degree in co-relation 30517. Up to 14410 conditions per place. [2022-12-13 16:34:02,015 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 56 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2022-12-13 16:34:02,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 310 flow [2022-12-13 16:34:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:34:02,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:34:02,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1371 transitions. [2022-12-13 16:34:02,020 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4616161616161616 [2022-12-13 16:34:02,020 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1371 transitions. [2022-12-13 16:34:02,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1371 transitions. [2022-12-13 16:34:02,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:34:02,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1371 transitions. [2022-12-13 16:34:02,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 228.5) internal successors, (1371), 6 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:02,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:02,025 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:02,025 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 176 flow. Second operand 6 states and 1371 transitions. [2022-12-13 16:34:02,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 310 flow [2022-12-13 16:34:02,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:34:02,028 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 210 flow [2022-12-13 16:34:02,028 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2022-12-13 16:34:02,029 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2022-12-13 16:34:02,029 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 210 flow [2022-12-13 16:34:02,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 219.85714285714286) internal successors, (1539), 7 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:02,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:34:02,030 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:34:02,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:34:02,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:34:02,230 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 16:34:02,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:34:02,231 INFO L85 PathProgramCache]: Analyzing trace with hash -178871221, now seen corresponding path program 2 times [2022-12-13 16:34:02,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:34:02,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622700489] [2022-12-13 16:34:02,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:34:02,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:34:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:34:02,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:34:02,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:34:02,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622700489] [2022-12-13 16:34:02,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622700489] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:34:02,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128195059] [2022-12-13 16:34:02,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:34:02,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:34:02,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:34:02,294 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:34:02,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:34:02,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:34:02,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:34:02,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 16:34:02,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:34:02,397 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 7 treesize of output 6 [2022-12-13 16:34:02,458 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:34:02,458 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 11 treesize of output 11 [2022-12-13 16:34:02,480 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 13 treesize of output 15 [2022-12-13 16:34:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:34:02,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:34:02,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128195059] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:34:02,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:34:02,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-13 16:34:02,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889130121] [2022-12-13 16:34:02,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:34:02,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:34:02,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:34:02,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:34:02,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:34:02,660 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 495 [2022-12-13 16:34:02,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 210.33333333333334) internal successors, (1262), 6 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:02,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:34:02,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 495 [2022-12-13 16:34:02,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:34:03,760 INFO L130 PetriNetUnfolder]: 10252/16601 cut-off events. [2022-12-13 16:34:03,760 INFO L131 PetriNetUnfolder]: For 639/639 co-relation queries the response was YES. [2022-12-13 16:34:03,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32743 conditions, 16601 events. 10252/16601 cut-off events. For 639/639 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 117195 event pairs, 2116 based on Foata normal form. 0/14526 useless extension candidates. Maximal degree in co-relation 32707. Up to 12044 conditions per place. [2022-12-13 16:34:03,813 INFO L137 encePairwiseOnDemand]: 486/495 looper letters, 133 selfloop transitions, 14 changer transitions 9/169 dead transitions. [2022-12-13 16:34:03,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 169 transitions, 743 flow [2022-12-13 16:34:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:34:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:34:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1407 transitions. [2022-12-13 16:34:03,815 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47373737373737373 [2022-12-13 16:34:03,815 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1407 transitions. [2022-12-13 16:34:03,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1407 transitions. [2022-12-13 16:34:03,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:34:03,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1407 transitions. [2022-12-13 16:34:03,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 234.5) internal successors, (1407), 6 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:03,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:03,820 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 495.0) internal successors, (3465), 7 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:03,820 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 210 flow. Second operand 6 states and 1407 transitions. [2022-12-13 16:34:03,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 169 transitions, 743 flow [2022-12-13 16:34:03,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 169 transitions, 729 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 16:34:03,856 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 280 flow [2022-12-13 16:34:03,857 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2022-12-13 16:34:03,857 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 19 predicate places. [2022-12-13 16:34:03,857 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 280 flow [2022-12-13 16:34:03,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 210.33333333333334) internal successors, (1262), 6 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:03,858 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:34:03,858 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 16:34:03,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:34:04,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:34:04,060 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 16:34:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:34:04,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1493798899, now seen corresponding path program 1 times [2022-12-13 16:34:04,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:34:04,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976365361] [2022-12-13 16:34:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:34:04,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:34:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:34:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 16:34:04,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:34:04,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976365361] [2022-12-13 16:34:04,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976365361] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:34:04,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465681452] [2022-12-13 16:34:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:34:04,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:34:04,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:34:04,155 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:34:04,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:34:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:34:04,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:34:04,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:34:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 16:34:04,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:34:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 16:34:04,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465681452] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:34:04,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:34:04,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 16:34:04,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777224522] [2022-12-13 16:34:04,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:34:04,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 16:34:04,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:34:04,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 16:34:04,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:34:04,296 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 495 [2022-12-13 16:34:04,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 280 flow. Second operand has 13 states, 13 states have (on average 219.3846153846154) internal successors, (2852), 13 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:04,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:34:04,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 495 [2022-12-13 16:34:04,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:34:05,639 INFO L130 PetriNetUnfolder]: 10250/16388 cut-off events. [2022-12-13 16:34:05,640 INFO L131 PetriNetUnfolder]: For 3521/3521 co-relation queries the response was YES. [2022-12-13 16:34:05,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35685 conditions, 16388 events. 10250/16388 cut-off events. For 3521/3521 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 112705 event pairs, 9003 based on Foata normal form. 6/15054 useless extension candidates. Maximal degree in co-relation 35627. Up to 15455 conditions per place. [2022-12-13 16:34:05,685 INFO L137 encePairwiseOnDemand]: 492/495 looper letters, 68 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2022-12-13 16:34:05,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 92 transitions, 474 flow [2022-12-13 16:34:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:34:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 16:34:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2688 transitions. [2022-12-13 16:34:05,690 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45252525252525255 [2022-12-13 16:34:05,690 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2688 transitions. [2022-12-13 16:34:05,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2688 transitions. [2022-12-13 16:34:05,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:34:05,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2688 transitions. [2022-12-13 16:34:05,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:05,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 495.0) internal successors, (6435), 13 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:05,716 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 495.0) internal successors, (6435), 13 states have internal predecessors, (6435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:05,716 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 280 flow. Second operand 12 states and 2688 transitions. [2022-12-13 16:34:05,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 92 transitions, 474 flow [2022-12-13 16:34:05,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 92 transitions, 474 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:34:05,724 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 364 flow [2022-12-13 16:34:05,724 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=495, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=364, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2022-12-13 16:34:05,725 INFO L288 CegarLoopForPetriNet]: 68 programPoint places, 36 predicate places. [2022-12-13 16:34:05,725 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 364 flow [2022-12-13 16:34:05,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 219.3846153846154) internal successors, (2852), 13 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:05,726 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:34:05,727 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 16:34:05,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 16:34:05,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 16:34:05,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 16:34:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:34:05,929 INFO L85 PathProgramCache]: Analyzing trace with hash 2070631187, now seen corresponding path program 2 times [2022-12-13 16:34:05,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:34:05,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749858152] [2022-12-13 16:34:05,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:34:05,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:34:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:34:05,981 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 16:34:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:34:05,997 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 16:34:05,997 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 16:34:05,997 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 16:34:05,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 16:34:05,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 16:34:05,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 16:34:05,997 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 16:34:05,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 16:34:05,997 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-12-13 16:34:05,998 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 16:34:05,998 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 16:34:06,021 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 16:34:06,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 341 transitions, 712 flow [2022-12-13 16:34:06,085 INFO L130 PetriNetUnfolder]: 110/640 cut-off events. [2022-12-13 16:34:06,086 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-12-13 16:34:06,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 640 events. 110/640 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2803 event pairs, 1 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 446. Up to 16 conditions per place. [2022-12-13 16:34:06,090 INFO L82 GeneralOperation]: Start removeDead. Operand has 289 places, 341 transitions, 712 flow [2022-12-13 16:34:06,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 341 transitions, 712 flow [2022-12-13 16:34:06,093 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:34:06,094 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 289 places, 341 transitions, 712 flow [2022-12-13 16:34:06,094 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 289 places, 341 transitions, 712 flow [2022-12-13 16:34:06,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 341 transitions, 712 flow [2022-12-13 16:34:06,155 INFO L130 PetriNetUnfolder]: 110/640 cut-off events. [2022-12-13 16:34:06,155 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-12-13 16:34:06,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 640 events. 110/640 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2803 event pairs, 1 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 446. Up to 16 conditions per place. [2022-12-13 16:34:06,179 INFO L119 LiptonReduction]: Number of co-enabled transitions 65100 [2022-12-13 16:34:09,115 INFO L134 LiptonReduction]: Checked pairs total: 110720 [2022-12-13 16:34:09,115 INFO L136 LiptonReduction]: Total number of compositions: 282 [2022-12-13 16:34:09,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:34:09,117 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;@4add4db8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:34:09,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 16:34:09,119 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2022-12-13 16:34:09,119 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:34:09,119 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:34:09,119 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:34:09,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 16:34:09,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:34:09,119 INFO L85 PathProgramCache]: Analyzing trace with hash 304633241, now seen corresponding path program 1 times [2022-12-13 16:34:09,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:34:09,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438517390] [2022-12-13 16:34:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:34:09,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:34:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:34:09,140 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 16:34:09,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:34:09,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438517390] [2022-12-13 16:34:09,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438517390] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:34:09,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:34:09,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:34:09,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744540472] [2022-12-13 16:34:09,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:34:09,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:34:09,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:34:09,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:34:09,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:34:09,150 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 623 [2022-12-13 16:34:09,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 133 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:09,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:34:09,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 623 [2022-12-13 16:34:09,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:34:27,581 INFO L130 PetriNetUnfolder]: 211193/301478 cut-off events. [2022-12-13 16:34:27,581 INFO L131 PetriNetUnfolder]: For 3280/3280 co-relation queries the response was YES. [2022-12-13 16:34:27,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579962 conditions, 301478 events. 211193/301478 cut-off events. For 3280/3280 co-relation queries the response was YES. Maximal size of possible extension queue 8128. Compared 2426955 event pairs, 200610 based on Foata normal form. 63086/318618 useless extension candidates. Maximal degree in co-relation 39853. Up to 276498 conditions per place. [2022-12-13 16:34:28,783 INFO L137 encePairwiseOnDemand]: 578/623 looper letters, 70 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2022-12-13 16:34:28,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 356 flow [2022-12-13 16:34:28,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:34:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:34:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 943 transitions. [2022-12-13 16:34:28,786 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5045478865703584 [2022-12-13 16:34:28,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 943 transitions. [2022-12-13 16:34:28,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 943 transitions. [2022-12-13 16:34:28,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:34:28,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 943 transitions. [2022-12-13 16:34:28,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 314.3333333333333) internal successors, (943), 3 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:28,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 623.0) internal successors, (2492), 4 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:28,791 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 623.0) internal successors, (2492), 4 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:28,791 INFO L175 Difference]: Start difference. First operand has 90 places, 133 transitions, 296 flow. Second operand 3 states and 943 transitions. [2022-12-13 16:34:28,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 356 flow [2022-12-13 16:34:28,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 91 transitions, 356 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:34:28,793 INFO L231 Difference]: Finished difference. Result has 92 places, 91 transitions, 222 flow [2022-12-13 16:34:28,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=623, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=92, PETRI_TRANSITIONS=91} [2022-12-13 16:34:28,794 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2022-12-13 16:34:28,794 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 91 transitions, 222 flow [2022-12-13 16:34:28,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:28,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:34:28,795 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:34:28,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 16:34:28,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 16:34:28,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:34:28,795 INFO L85 PathProgramCache]: Analyzing trace with hash -3565673, now seen corresponding path program 1 times [2022-12-13 16:34:28,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:34:28,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993673298] [2022-12-13 16:34:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:34:28,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:34:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:34:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:34:28,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:34:28,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993673298] [2022-12-13 16:34:28,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993673298] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:34:28,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954608304] [2022-12-13 16:34:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:34:28,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:34:28,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:34:28,829 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:34:28,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:34:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:34:28,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 16:34:28,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:34:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:34:28,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:34:28,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954608304] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:34:28,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:34:28,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 16:34:28,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867906353] [2022-12-13 16:34:28,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:34:28,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:34:28,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:34:28,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:34:28,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:34:28,912 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 623 [2022-12-13 16:34:28,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 91 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:28,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:34:28,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 623 [2022-12-13 16:34:28,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:34:46,999 INFO L130 PetriNetUnfolder]: 211748/302066 cut-off events. [2022-12-13 16:34:46,999 INFO L131 PetriNetUnfolder]: For 3212/3212 co-relation queries the response was YES. [2022-12-13 16:34:47,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580789 conditions, 302066 events. 211748/302066 cut-off events. For 3212/3212 co-relation queries the response was YES. Maximal size of possible extension queue 8052. Compared 2425927 event pairs, 131408 based on Foata normal form. 0/255655 useless extension candidates. Maximal degree in co-relation 580775. Up to 276678 conditions per place. [2022-12-13 16:34:48,210 INFO L137 encePairwiseOnDemand]: 620/623 looper letters, 86 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2022-12-13 16:34:48,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 107 transitions, 430 flow [2022-12-13 16:34:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:34:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 16:34:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 916 transitions. [2022-12-13 16:34:48,213 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4901016586409845 [2022-12-13 16:34:48,213 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 916 transitions. [2022-12-13 16:34:48,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 916 transitions. [2022-12-13 16:34:48,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:34:48,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 916 transitions. [2022-12-13 16:34:48,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:48,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 623.0) internal successors, (2492), 4 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:48,217 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 623.0) internal successors, (2492), 4 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:48,217 INFO L175 Difference]: Start difference. First operand has 92 places, 91 transitions, 222 flow. Second operand 3 states and 916 transitions. [2022-12-13 16:34:48,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 107 transitions, 430 flow [2022-12-13 16:34:48,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 107 transitions, 426 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 16:34:48,220 INFO L231 Difference]: Finished difference. Result has 94 places, 92 transitions, 230 flow [2022-12-13 16:34:48,220 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=623, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=94, PETRI_TRANSITIONS=92} [2022-12-13 16:34:48,220 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2022-12-13 16:34:48,220 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 92 transitions, 230 flow [2022-12-13 16:34:48,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:48,221 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:34:48,221 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:34:48,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 16:34:48,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 16:34:48,422 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 16:34:48,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:34:48,423 INFO L85 PathProgramCache]: Analyzing trace with hash 144274078, now seen corresponding path program 1 times [2022-12-13 16:34:48,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:34:48,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024149125] [2022-12-13 16:34:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:34:48,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:34:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:34:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:34:48,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:34:48,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024149125] [2022-12-13 16:34:48,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024149125] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:34:48,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146274132] [2022-12-13 16:34:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:34:48,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:34:48,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:34:48,458 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:34:48,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:34:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:34:48,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:34:48,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:34:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:34:48,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:34:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:34:48,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146274132] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:34:48,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:34:48,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 16:34:48,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363811449] [2022-12-13 16:34:48,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:34:48,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:34:48,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:34:48,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:34:48,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:34:48,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 623 [2022-12-13 16:34:48,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 92 transitions, 230 flow. Second operand has 7 states, 7 states have (on average 276.85714285714283) internal successors, (1938), 7 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:34:48,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:34:48,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 623 [2022-12-13 16:34:48,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:35:06,698 INFO L130 PetriNetUnfolder]: 213192/303010 cut-off events. [2022-12-13 16:35:06,698 INFO L131 PetriNetUnfolder]: For 10848/10848 co-relation queries the response was YES. [2022-12-13 16:35:07,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589398 conditions, 303010 events. 213192/303010 cut-off events. For 10848/10848 co-relation queries the response was YES. Maximal size of possible extension queue 8021. Compared 2414555 event pairs, 200610 based on Foata normal form. 3/260369 useless extension candidates. Maximal degree in co-relation 589369. Up to 276694 conditions per place. [2022-12-13 16:35:08,125 INFO L137 encePairwiseOnDemand]: 620/623 looper letters, 71 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2022-12-13 16:35:08,126 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 95 transitions, 394 flow [2022-12-13 16:35:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:35:08,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:35:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1728 transitions. [2022-12-13 16:35:08,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4622792937399679 [2022-12-13 16:35:08,134 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1728 transitions. [2022-12-13 16:35:08,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1728 transitions. [2022-12-13 16:35:08,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:35:08,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1728 transitions. [2022-12-13 16:35:08,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 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 16:35:08,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 623.0) internal successors, (4361), 7 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:08,149 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 623.0) internal successors, (4361), 7 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:08,149 INFO L175 Difference]: Start difference. First operand has 94 places, 92 transitions, 230 flow. Second operand 6 states and 1728 transitions. [2022-12-13 16:35:08,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 95 transitions, 394 flow [2022-12-13 16:35:08,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 95 transitions, 392 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 16:35:08,165 INFO L231 Difference]: Finished difference. Result has 101 places, 95 transitions, 264 flow [2022-12-13 16:35:08,165 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=623, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=101, PETRI_TRANSITIONS=95} [2022-12-13 16:35:08,166 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, 11 predicate places. [2022-12-13 16:35:08,166 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 95 transitions, 264 flow [2022-12-13 16:35:08,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 276.85714285714283) internal successors, (1938), 7 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:08,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:35:08,166 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:35:08,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 16:35:08,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 16:35:08,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 16:35:08,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:35:08,369 INFO L85 PathProgramCache]: Analyzing trace with hash 735733664, now seen corresponding path program 2 times [2022-12-13 16:35:08,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:35:08,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999199684] [2022-12-13 16:35:08,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:35:08,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:35:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:35:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:35:08,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:35:08,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999199684] [2022-12-13 16:35:08,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999199684] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:35:08,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712658830] [2022-12-13 16:35:08,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:35:08,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:35:08,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:35:08,450 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:35:08,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:35:08,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:35:08,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:35:08,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 16:35:08,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:35:08,532 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 7 treesize of output 6 [2022-12-13 16:35:08,566 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:35:08,567 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 11 treesize of output 11 [2022-12-13 16:35:08,585 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 13 treesize of output 15 [2022-12-13 16:35:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 16:35:08,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:35:08,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712658830] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:35:08,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:35:08,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-13 16:35:08,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717105873] [2022-12-13 16:35:08,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:35:08,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:35:08,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:35:08,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:35:08,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:35:08,768 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 623 [2022-12-13 16:35:08,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 95 transitions, 264 flow. Second operand has 6 states, 6 states have (on average 265.3333333333333) internal successors, (1592), 6 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:08,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:35:08,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 623 [2022-12-13 16:35:08,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:35:29,692 INFO L130 PetriNetUnfolder]: 226236/327463 cut-off events. [2022-12-13 16:35:29,693 INFO L131 PetriNetUnfolder]: For 11244/11244 co-relation queries the response was YES. [2022-12-13 16:35:30,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640301 conditions, 327463 events. 226236/327463 cut-off events. For 11244/11244 co-relation queries the response was YES. Maximal size of possible extension queue 9193. Compared 2758553 event pairs, 42713 based on Foata normal form. 0/285369 useless extension candidates. Maximal degree in co-relation 640264. Up to 249622 conditions per place. [2022-12-13 16:35:31,440 INFO L137 encePairwiseOnDemand]: 613/623 looper letters, 199 selfloop transitions, 18 changer transitions 0/236 dead transitions. [2022-12-13 16:35:31,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 236 transitions, 1031 flow [2022-12-13 16:35:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:35:31,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 16:35:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1798 transitions. [2022-12-13 16:35:31,448 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4810058855002675 [2022-12-13 16:35:31,449 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1798 transitions. [2022-12-13 16:35:31,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1798 transitions. [2022-12-13 16:35:31,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:35:31,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1798 transitions. [2022-12-13 16:35:31,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 299.6666666666667) internal successors, (1798), 6 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:31,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 623.0) internal successors, (4361), 7 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:31,463 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 623.0) internal successors, (4361), 7 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:31,463 INFO L175 Difference]: Start difference. First operand has 101 places, 95 transitions, 264 flow. Second operand 6 states and 1798 transitions. [2022-12-13 16:35:31,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 236 transitions, 1031 flow [2022-12-13 16:35:31,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 236 transitions, 1017 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 16:35:31,475 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 355 flow [2022-12-13 16:35:31,476 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=623, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2022-12-13 16:35:31,476 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, 18 predicate places. [2022-12-13 16:35:31,476 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 355 flow [2022-12-13 16:35:31,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 265.3333333333333) internal successors, (1592), 6 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:31,477 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:35:31,477 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:35:31,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 16:35:31,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 16:35:31,678 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 16:35:31,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:35:31,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1464714882, now seen corresponding path program 1 times [2022-12-13 16:35:31,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:35:31,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076885870] [2022-12-13 16:35:31,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:35:31,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:35:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:35:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:35:31,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:35:31,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076885870] [2022-12-13 16:35:31,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076885870] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:35:31,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439329302] [2022-12-13 16:35:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:35:31,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:35:31,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:35:31,739 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:35:31,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 16:35:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:35:31,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:35:31,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:35:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:35:31,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:35:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:35:31,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439329302] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:35:31,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:35:31,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 16:35:31,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950109228] [2022-12-13 16:35:31,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:35:31,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 16:35:31,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:35:31,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 16:35:31,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:35:31,881 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 623 [2022-12-13 16:35:31,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 355 flow. Second operand has 13 states, 13 states have (on average 276.6923076923077) internal successors, (3597), 13 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:31,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:35:31,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 623 [2022-12-13 16:35:31,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:35:56,160 INFO L130 PetriNetUnfolder]: 226777/326445 cut-off events. [2022-12-13 16:35:56,161 INFO L131 PetriNetUnfolder]: For 59205/59205 co-relation queries the response was YES. [2022-12-13 16:35:57,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691091 conditions, 326445 events. 226777/326445 cut-off events. For 59205/59205 co-relation queries the response was YES. Maximal size of possible extension queue 9173. Compared 2703818 event pairs, 200834 based on Foata normal form. 6/295397 useless extension candidates. Maximal degree in co-relation 691032. Up to 301869 conditions per place. [2022-12-13 16:35:57,833 INFO L137 encePairwiseOnDemand]: 620/623 looper letters, 87 selfloop transitions, 11 changer transitions 0/117 dead transitions. [2022-12-13 16:35:57,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 117 transitions, 587 flow [2022-12-13 16:35:57,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:35:57,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 16:35:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3387 transitions. [2022-12-13 16:35:57,839 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4530497592295345 [2022-12-13 16:35:57,839 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3387 transitions. [2022-12-13 16:35:57,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3387 transitions. [2022-12-13 16:35:57,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:35:57,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3387 transitions. [2022-12-13 16:35:57,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 282.25) internal successors, (3387), 12 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:57,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 623.0) internal successors, (8099), 13 states have internal predecessors, (8099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:57,850 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 623.0) internal successors, (8099), 13 states have internal predecessors, (8099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:57,850 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 355 flow. Second operand 12 states and 3387 transitions. [2022-12-13 16:35:57,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 117 transitions, 587 flow [2022-12-13 16:35:57,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 117 transitions, 587 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 16:35:57,946 INFO L231 Difference]: Finished difference. Result has 125 places, 117 transitions, 439 flow [2022-12-13 16:35:57,946 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=623, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=439, PETRI_PLACES=125, PETRI_TRANSITIONS=117} [2022-12-13 16:35:57,947 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, 35 predicate places. [2022-12-13 16:35:57,947 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 117 transitions, 439 flow [2022-12-13 16:35:57,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 276.6923076923077) internal successors, (3597), 13 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:35:57,947 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:35:57,947 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:35:57,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 16:35:58,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 16:35:58,149 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 16:35:58,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:35:58,150 INFO L85 PathProgramCache]: Analyzing trace with hash 2011014594, now seen corresponding path program 2 times [2022-12-13 16:35:58,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:35:58,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133198060] [2022-12-13 16:35:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:35:58,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:35:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:35:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 16:35:58,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:35:58,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133198060] [2022-12-13 16:35:58,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133198060] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:35:58,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630970730] [2022-12-13 16:35:58,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:35:58,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:35:58,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:35:58,342 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:35:58,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 16:35:58,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:35:58,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:35:58,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 16:35:58,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:35:58,446 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 7 treesize of output 6 [2022-12-13 16:35:58,500 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 16:35:58,500 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 11 treesize of output 11 [2022-12-13 16:35:58,514 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 13 treesize of output 15 [2022-12-13 16:35:58,533 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 13 treesize of output 15 [2022-12-13 16:35:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 16:35:58,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:36:06,600 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_432 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_432) |c_~#a~0.base|))) is different from false [2022-12-13 16:36:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2022-12-13 16:36:06,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630970730] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:36:06,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:36:06,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-12-13 16:36:06,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226729372] [2022-12-13 16:36:06,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:36:06,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 16:36:06,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:36:06,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 16:36:06,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=77, Unknown=5, NotChecked=18, Total=132 [2022-12-13 16:36:08,699 WARN L539 Checker$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 16:36:10,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:12,707 WARN L539 Checker$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 16:36:14,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:17,306 WARN L539 Checker$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 16:36:19,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:21,314 WARN L539 Checker$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 16:36:23,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:25,319 WARN L539 Checker$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 16:36:27,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:29,326 WARN L539 Checker$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 16:36:31,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:33,336 WARN L539 Checker$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 16:36:35,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:37,344 WARN L539 Checker$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 16:36:39,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:41,350 WARN L539 Checker$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 16:36:43,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:45,360 WARN L539 Checker$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 16:36:47,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:49,986 WARN L539 Checker$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 16:36:51,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:53,993 WARN L539 Checker$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 16:36:55,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:36:57,999 WARN L539 Checker$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 16:37:00,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:37:02,009 WARN L539 Checker$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 16:37:04,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:37:06,018 WARN L539 Checker$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 16:37:08,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:37:10,027 WARN L539 Checker$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 16:37:12,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:37:14,034 WARN L539 Checker$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 16:37:16,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:37:18,042 WARN L539 Checker$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 16:37:20,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:37:22,052 WARN L539 Checker$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 16:37:24,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:37:26,059 WARN L539 Checker$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 16:37:28,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:37:30,068 WARN L539 Checker$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 16:37:32,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:37:34,077 WARN L539 Checker$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 16:37:36,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 16:37:38,084 WARN L539 Checker$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 16:37:38,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 623 [2022-12-13 16:37:38,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 117 transitions, 439 flow. Second operand has 12 states, 12 states have (on average 234.75) internal successors, (2817), 12 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 16:37:38,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:37:38,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 623 [2022-12-13 16:37:38,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 16:38:11,431 INFO L130 PetriNetUnfolder]: 282584/399273 cut-off events. [2022-12-13 16:38:11,431 INFO L131 PetriNetUnfolder]: For 74458/74458 co-relation queries the response was YES. [2022-12-13 16:38:12,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 854620 conditions, 399273 events. 282584/399273 cut-off events. For 74458/74458 co-relation queries the response was YES. Maximal size of possible extension queue 11117. Compared 3278138 event pairs, 51618 based on Foata normal form. 0/366683 useless extension candidates. Maximal degree in co-relation 854536. Up to 287148 conditions per place. [2022-12-13 16:38:13,812 INFO L137 encePairwiseOnDemand]: 606/623 looper letters, 250 selfloop transitions, 39 changer transitions 0/306 dead transitions. [2022-12-13 16:38:13,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 306 transitions, 1527 flow [2022-12-13 16:38:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:38:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 16:38:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2125 transitions. [2022-12-13 16:38:13,819 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42636436597110755 [2022-12-13 16:38:13,819 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2125 transitions. [2022-12-13 16:38:13,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2125 transitions. [2022-12-13 16:38:13,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 16:38:13,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2125 transitions. [2022-12-13 16:38:13,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 265.625) internal successors, (2125), 8 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:13,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 623.0) internal successors, (5607), 9 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:13,830 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 623.0) internal successors, (5607), 9 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:13,830 INFO L175 Difference]: Start difference. First operand has 125 places, 117 transitions, 439 flow. Second operand 8 states and 2125 transitions. [2022-12-13 16:38:13,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 306 transitions, 1527 flow [2022-12-13 16:38:14,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 306 transitions, 1479 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 16:38:14,078 INFO L231 Difference]: Finished difference. Result has 132 places, 140 transitions, 649 flow [2022-12-13 16:38:14,078 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=623, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=649, PETRI_PLACES=132, PETRI_TRANSITIONS=140} [2022-12-13 16:38:14,078 INFO L288 CegarLoopForPetriNet]: 90 programPoint places, 42 predicate places. [2022-12-13 16:38:14,079 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 140 transitions, 649 flow [2022-12-13 16:38:14,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 234.75) internal successors, (2817), 12 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 16:38:14,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:38:14,079 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 16:38:14,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 16:38:14,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a2d7ef1-7bf3-43e0-8c13-3b1951c8509d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 16:38:14,281 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 16:38:14,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:38:14,282 INFO L85 PathProgramCache]: Analyzing trace with hash -859320685, now seen corresponding path program 1 times [2022-12-13 16:38:14,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:38:14,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715592222] [2022-12-13 16:38:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:38:14,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:38:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:38:14,328 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 16:38:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 16:38:14,343 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 16:38:14,343 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 16:38:14,343 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 16:38:14,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-13 16:38:14,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-13 16:38:14,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 16:38:14,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 16:38:14,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 16:38:14,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 16:38:14,344 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2022-12-13 16:38:14,344 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 16:38:14,344 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 16:38:14,373 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 16:38:14,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 349 places, 413 transitions, 870 flow [2022-12-13 16:38:14,492 INFO L130 PetriNetUnfolder]: 157/910 cut-off events. [2022-12-13 16:38:14,492 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2022-12-13 16:38:14,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 910 events. 157/910 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4351 event pairs, 6 based on Foata normal form. 0/744 useless extension candidates. Maximal degree in co-relation 660. Up to 32 conditions per place. [2022-12-13 16:38:14,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 349 places, 413 transitions, 870 flow [2022-12-13 16:38:14,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 349 places, 413 transitions, 870 flow [2022-12-13 16:38:14,507 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 16:38:14,507 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 349 places, 413 transitions, 870 flow [2022-12-13 16:38:14,507 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 349 places, 413 transitions, 870 flow [2022-12-13 16:38:14,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 349 places, 413 transitions, 870 flow [2022-12-13 16:38:14,623 INFO L130 PetriNetUnfolder]: 157/910 cut-off events. [2022-12-13 16:38:14,623 INFO L131 PetriNetUnfolder]: For 48/52 co-relation queries the response was YES. [2022-12-13 16:38:14,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 910 events. 157/910 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4351 event pairs, 6 based on Foata normal form. 0/744 useless extension candidates. Maximal degree in co-relation 660. Up to 32 conditions per place. [2022-12-13 16:38:14,670 INFO L119 LiptonReduction]: Number of co-enabled transitions 107240 [2022-12-13 16:38:18,355 INFO L134 LiptonReduction]: Checked pairs total: 189001 [2022-12-13 16:38:18,355 INFO L136 LiptonReduction]: Total number of compositions: 342 [2022-12-13 16:38:18,356 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:38:18,357 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;@4add4db8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:38:18,357 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 16:38:18,359 INFO L130 PetriNetUnfolder]: 7/23 cut-off events. [2022-12-13 16:38:18,359 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 16:38:18,359 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 16:38:18,359 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 16:38:18,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 16:38:18,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:38:18,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1074874861, now seen corresponding path program 1 times [2022-12-13 16:38:18,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:38:18,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705743091] [2022-12-13 16:38:18,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:38:18,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:38:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:38:18,376 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 16:38:18,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:38:18,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705743091] [2022-12-13 16:38:18,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705743091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:38:18,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:38:18,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:38:18,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260700435] [2022-12-13 16:38:18,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:38:18,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:38:18,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:38:18,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:38:18,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:38:18,386 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 755 [2022-12-13 16:38:18,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 165 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 335.0) internal successors, (1005), 3 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:38:18,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 16:38:18,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 755 [2022-12-13 16:38:18,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand