./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/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_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/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_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/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 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --- 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 14:20:04,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:20:04,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:20:05,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:20:05,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:20:05,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:20:05,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:20:05,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:20:05,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:20:05,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:20:05,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:20:05,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:20:05,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:20:05,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:20:05,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:20:05,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:20:05,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:20:05,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:20:05,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:20:05,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:20:05,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:20:05,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:20:05,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:20:05,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:20:05,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:20:05,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:20:05,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:20:05,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:20:05,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:20:05,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:20:05,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:20:05,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:20:05,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:20:05,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:20:05,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:20:05,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:20:05,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:20:05,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:20:05,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:20:05,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:20:05,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:20:05,044 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 14:20:05,064 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:20:05,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:20:05,065 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:20:05,065 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:20:05,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:20:05,066 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:20:05,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:20:05,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:20:05,072 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:20:05,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:20:05,072 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:20:05,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:20:05,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:20:05,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:20:05,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 14:20:05,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:20:05,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 14:20:05,073 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:20:05,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 14:20:05,074 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:20:05,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 14:20:05,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:20:05,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:20:05,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:20:05,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:20:05,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:20:05,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:20:05,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 14:20:05,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:20:05,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:20:05,075 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:20:05,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 14:20:05,075 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:20:05,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:20:05,076 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:20:05,076 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_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 [2022-12-13 14:20:05,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:20:05,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:20:05,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:20:05,286 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:20:05,286 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:20:05,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-12-13 14:20:07,863 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:20:08,015 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:20:08,015 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-12-13 14:20:08,020 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/data/60ca39f59/967f10a6cdb746fdab237c8828baf1d1/FLAGe2b368a50 [2022-12-13 14:20:08,035 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/data/60ca39f59/967f10a6cdb746fdab237c8828baf1d1 [2022-12-13 14:20:08,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:20:08,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:20:08,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:20:08,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:20:08,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:20:08,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:20:08" (1/1) ... [2022-12-13 14:20:08,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@652c970e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:20:08, skipping insertion in model container [2022-12-13 14:20:08,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:20:08" (1/1) ... [2022-12-13 14:20:08,052 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:20:08,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:20:08,182 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_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/sv-benchmarks/c/weaver/unroll-3.wvr.c[2500,2513] [2022-12-13 14:20:08,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:20:08,194 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:20:08,209 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_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/sv-benchmarks/c/weaver/unroll-3.wvr.c[2500,2513] [2022-12-13 14:20:08,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:20:08,221 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:20:08,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:20:08 WrapperNode [2022-12-13 14:20:08,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:20:08,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:20:08,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:20:08,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:20:08,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:20:08" (1/1) ... [2022-12-13 14:20:08,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:20:08" (1/1) ... [2022-12-13 14:20:08,249 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 144 [2022-12-13 14:20:08,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:20:08,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:20:08,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:20:08,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:20:08,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:20:08" (1/1) ... [2022-12-13 14:20:08,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:20:08" (1/1) ... [2022-12-13 14:20:08,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:20:08" (1/1) ... [2022-12-13 14:20:08,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:20:08" (1/1) ... [2022-12-13 14:20:08,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:20:08" (1/1) ... [2022-12-13 14:20:08,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:20:08" (1/1) ... [2022-12-13 14:20:08,267 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:20:08" (1/1) ... [2022-12-13 14:20:08,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:20:08" (1/1) ... [2022-12-13 14:20:08,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:20:08,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:20:08,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:20:08,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:20:08,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:20:08" (1/1) ... [2022-12-13 14:20:08,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:20:08,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:20:08,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:20:08,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:20:08,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:20:08,329 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 14:20:08,329 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 14:20:08,329 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 14:20:08,330 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 14:20:08,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:20:08,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 14:20:08,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 14:20:08,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 14:20:08,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:20:08,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:20:08,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 14:20:08,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:20:08,332 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 14:20:08,419 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:20:08,421 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:20:08,634 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:20:08,644 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:20:08,644 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 14:20:08,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:20:08 BoogieIcfgContainer [2022-12-13 14:20:08,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:20:08,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:20:08,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:20:08,652 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:20:08,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:20:08" (1/3) ... [2022-12-13 14:20:08,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1c14e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:20:08, skipping insertion in model container [2022-12-13 14:20:08,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:20:08" (2/3) ... [2022-12-13 14:20:08,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e1c14e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:20:08, skipping insertion in model container [2022-12-13 14:20:08,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:20:08" (3/3) ... [2022-12-13 14:20:08,655 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2022-12-13 14:20:08,662 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 14:20:08,669 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:20:08,669 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 14:20:08,669 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 14:20:08,732 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 14:20:08,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 185 transitions, 386 flow [2022-12-13 14:20:08,848 INFO L130 PetriNetUnfolder]: 15/183 cut-off events. [2022-12-13 14:20:08,848 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:20:08,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 183 events. 15/183 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 173 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-12-13 14:20:08,852 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 185 transitions, 386 flow [2022-12-13 14:20:08,858 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 174 transitions, 360 flow [2022-12-13 14:20:08,860 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 14:20:08,869 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 174 transitions, 360 flow [2022-12-13 14:20:08,871 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 174 transitions, 360 flow [2022-12-13 14:20:08,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 174 transitions, 360 flow [2022-12-13 14:20:08,913 INFO L130 PetriNetUnfolder]: 15/174 cut-off events. [2022-12-13 14:20:08,914 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:20:08,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 174 events. 15/174 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 152 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-12-13 14:20:08,917 INFO L119 LiptonReduction]: Number of co-enabled transitions 2856 [2022-12-13 14:20:12,511 INFO L134 LiptonReduction]: Checked pairs total: 2711 [2022-12-13 14:20:12,511 INFO L136 LiptonReduction]: Total number of compositions: 204 [2022-12-13 14:20:12,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:20:12,526 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;@21529fad, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:20:12,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 14:20:12,529 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2022-12-13 14:20:12,529 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:20:12,529 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:20:12,530 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:20:12,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:20:12,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:20:12,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1894597803, now seen corresponding path program 1 times [2022-12-13 14:20:12,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:20:12,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639094517] [2022-12-13 14:20:12,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:20:12,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:20:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:12,776 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 14:20:12,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:20:12,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639094517] [2022-12-13 14:20:12,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639094517] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:20:12,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:20:12,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:20:12,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216155680] [2022-12-13 14:20:12,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:20:12,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:20:12,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:20:12,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:20:12,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:20:12,819 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 389 [2022-12-13 14:20:12,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:12,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:20:12,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 389 [2022-12-13 14:20:12,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:20:12,868 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2022-12-13 14:20:12,869 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 14:20:12,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 185 event pairs, 18 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2022-12-13 14:20:12,871 INFO L137 encePairwiseOnDemand]: 386/389 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2022-12-13 14:20:12,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2022-12-13 14:20:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:20:12,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:20:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2022-12-13 14:20:12,882 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4361610968294773 [2022-12-13 14:20:12,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2022-12-13 14:20:12,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2022-12-13 14:20:12,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:20:12,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2022-12-13 14:20:12,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:12,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:12,892 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:12,893 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 509 transitions. [2022-12-13 14:20:12,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2022-12-13 14:20:12,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 14:20:12,897 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2022-12-13 14:20:12,898 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2022-12-13 14:20:12,902 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2022-12-13 14:20:12,902 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2022-12-13 14:20:12,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:12,903 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:20:12,903 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:20:12,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:20:12,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:20:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:20:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash 87824752, now seen corresponding path program 1 times [2022-12-13 14:20:12,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:20:12,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652604879] [2022-12-13 14:20:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:20:12,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:20:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:13,098 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 14:20:13,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:20:13,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652604879] [2022-12-13 14:20:13,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652604879] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:20:13,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:20:13,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:20:13,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562724185] [2022-12-13 14:20:13,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:20:13,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:20:13,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:20:13,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:20:13,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:20:13,122 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 389 [2022-12-13 14:20:13,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:20:13,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 389 [2022-12-13 14:20:13,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:20:13,176 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2022-12-13 14:20:13,176 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 14:20:13,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 318 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2022-12-13 14:20:13,177 INFO L137 encePairwiseOnDemand]: 385/389 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2022-12-13 14:20:13,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2022-12-13 14:20:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:20:13,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 14:20:13,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2022-12-13 14:20:13,179 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4387317909168809 [2022-12-13 14:20:13,179 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2022-12-13 14:20:13,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2022-12-13 14:20:13,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:20:13,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2022-12-13 14:20:13,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,183 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 389.0) internal successors, (1556), 4 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,183 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 512 transitions. [2022-12-13 14:20:13,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2022-12-13 14:20:13,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 14:20:13,184 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2022-12-13 14:20:13,184 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2022-12-13 14:20:13,184 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2022-12-13 14:20:13,185 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2022-12-13 14:20:13,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,185 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:20:13,185 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:20:13,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 14:20:13,185 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:20:13,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:20:13,186 INFO L85 PathProgramCache]: Analyzing trace with hash 185654533, now seen corresponding path program 1 times [2022-12-13 14:20:13,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:20:13,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060017007] [2022-12-13 14:20:13,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:20:13,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:20:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:20:13,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:20:13,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060017007] [2022-12-13 14:20:13,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060017007] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:20:13,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:20:13,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:20:13,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036187138] [2022-12-13 14:20:13,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:20:13,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:20:13,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:20:13,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:20:13,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:20:13,303 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 389 [2022-12-13 14:20:13,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,304 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:20:13,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 389 [2022-12-13 14:20:13,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:20:13,380 INFO L130 PetriNetUnfolder]: 74/143 cut-off events. [2022-12-13 14:20:13,380 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-12-13 14:20:13,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 143 events. 74/143 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 468 event pairs, 21 based on Foata normal form. 8/144 useless extension candidates. Maximal degree in co-relation 330. Up to 83 conditions per place. [2022-12-13 14:20:13,381 INFO L137 encePairwiseOnDemand]: 385/389 looper letters, 29 selfloop transitions, 4 changer transitions 2/36 dead transitions. [2022-12-13 14:20:13,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 36 transitions, 180 flow [2022-12-13 14:20:13,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:20:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:20:13,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 676 transitions. [2022-12-13 14:20:13,383 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43444730077120824 [2022-12-13 14:20:13,383 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 676 transitions. [2022-12-13 14:20:13,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 676 transitions. [2022-12-13 14:20:13,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:20:13,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 676 transitions. [2022-12-13 14:20:13,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 389.0) internal successors, (1945), 5 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,387 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 389.0) internal successors, (1945), 5 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,387 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 4 states and 676 transitions. [2022-12-13 14:20:13,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 36 transitions, 180 flow [2022-12-13 14:20:13,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 36 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 14:20:13,389 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 89 flow [2022-12-13 14:20:13,389 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2022-12-13 14:20:13,389 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2022-12-13 14:20:13,389 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 89 flow [2022-12-13 14:20:13,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,390 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:20:13,390 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:20:13,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 14:20:13,390 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:20:13,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:20:13,390 INFO L85 PathProgramCache]: Analyzing trace with hash -899732075, now seen corresponding path program 1 times [2022-12-13 14:20:13,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:20:13,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160911607] [2022-12-13 14:20:13,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:20:13,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:20:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:20:13,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:20:13,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160911607] [2022-12-13 14:20:13,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160911607] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:20:13,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:20:13,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:20:13,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976867439] [2022-12-13 14:20:13,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:20:13,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:20:13,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:20:13,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:20:13,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:20:13,552 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 389 [2022-12-13 14:20:13,554 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,554 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:20:13,554 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 389 [2022-12-13 14:20:13,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:20:13,681 INFO L130 PetriNetUnfolder]: 85/157 cut-off events. [2022-12-13 14:20:13,681 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-12-13 14:20:13,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 157 events. 85/157 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 481 event pairs, 2 based on Foata normal form. 10/166 useless extension candidates. Maximal degree in co-relation 447. Up to 72 conditions per place. [2022-12-13 14:20:13,682 INFO L137 encePairwiseOnDemand]: 383/389 looper letters, 34 selfloop transitions, 8 changer transitions 4/46 dead transitions. [2022-12-13 14:20:13,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 46 transitions, 255 flow [2022-12-13 14:20:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:20:13,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:20:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 989 transitions. [2022-12-13 14:20:13,686 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42373607540702657 [2022-12-13 14:20:13,686 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 989 transitions. [2022-12-13 14:20:13,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 989 transitions. [2022-12-13 14:20:13,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:20:13,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 989 transitions. [2022-12-13 14:20:13,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.83333333333334) internal successors, (989), 6 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 389.0) internal successors, (2723), 7 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,696 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 389.0) internal successors, (2723), 7 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,696 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 89 flow. Second operand 6 states and 989 transitions. [2022-12-13 14:20:13,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 46 transitions, 255 flow [2022-12-13 14:20:13,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 241 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-13 14:20:13,698 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 120 flow [2022-12-13 14:20:13,699 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=120, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2022-12-13 14:20:13,699 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2022-12-13 14:20:13,699 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 120 flow [2022-12-13 14:20:13,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:20:13,700 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:20:13,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 14:20:13,701 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:20:13,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:20:13,701 INFO L85 PathProgramCache]: Analyzing trace with hash 909063375, now seen corresponding path program 2 times [2022-12-13 14:20:13,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:20:13,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434433932] [2022-12-13 14:20:13,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:20:13,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:20:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:20:13,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:20:13,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434433932] [2022-12-13 14:20:13,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434433932] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:20:13,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:20:13,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:20:13,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423244898] [2022-12-13 14:20:13,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:20:13,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:20:13,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:20:13,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:20:13,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:20:13,829 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 389 [2022-12-13 14:20:13,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:20:13,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 389 [2022-12-13 14:20:13,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:20:13,909 INFO L130 PetriNetUnfolder]: 73/137 cut-off events. [2022-12-13 14:20:13,910 INFO L131 PetriNetUnfolder]: For 157/164 co-relation queries the response was YES. [2022-12-13 14:20:13,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 137 events. 73/137 cut-off events. For 157/164 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 354 event pairs, 22 based on Foata normal form. 11/147 useless extension candidates. Maximal degree in co-relation 429. Up to 91 conditions per place. [2022-12-13 14:20:13,911 INFO L137 encePairwiseOnDemand]: 385/389 looper letters, 30 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2022-12-13 14:20:13,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 39 transitions, 246 flow [2022-12-13 14:20:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:20:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 14:20:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 666 transitions. [2022-12-13 14:20:13,914 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42802056555269924 [2022-12-13 14:20:13,914 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 666 transitions. [2022-12-13 14:20:13,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 666 transitions. [2022-12-13 14:20:13,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:20:13,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 666 transitions. [2022-12-13 14:20:13,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.5) internal successors, (666), 4 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 389.0) internal successors, (1945), 5 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,920 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 389.0) internal successors, (1945), 5 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,920 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 120 flow. Second operand 4 states and 666 transitions. [2022-12-13 14:20:13,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 39 transitions, 246 flow [2022-12-13 14:20:13,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 39 transitions, 231 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-13 14:20:13,923 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 148 flow [2022-12-13 14:20:13,923 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2022-12-13 14:20:13,923 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 13 predicate places. [2022-12-13 14:20:13,924 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 148 flow [2022-12-13 14:20:13,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:13,924 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:20:13,924 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:20:13,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 14:20:13,925 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:20:13,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:20:13,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1486651423, now seen corresponding path program 3 times [2022-12-13 14:20:13,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:20:13,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781082942] [2022-12-13 14:20:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:20:13,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:20:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:20:14,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:20:14,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781082942] [2022-12-13 14:20:14,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781082942] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:20:14,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038034585] [2022-12-13 14:20:14,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:20:14,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:20:14,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:20:14,123 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:20:14,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:20:14,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 14:20:14,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:20:14,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:20:14,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:20:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:20:14,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:20:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:20:14,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038034585] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:20:14,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:20:14,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-12-13 14:20:14,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793393847] [2022-12-13 14:20:14,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:20:14,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:20:14,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:20:14,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:20:14,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:20:14,503 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 389 [2022-12-13 14:20:14,504 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 148 flow. Second operand has 9 states, 9 states have (on average 158.77777777777777) internal successors, (1429), 9 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:14,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:20:14,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 389 [2022-12-13 14:20:14,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:20:14,646 INFO L130 PetriNetUnfolder]: 98/177 cut-off events. [2022-12-13 14:20:14,646 INFO L131 PetriNetUnfolder]: For 413/413 co-relation queries the response was YES. [2022-12-13 14:20:14,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 177 events. 98/177 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 498 event pairs, 25 based on Foata normal form. 12/188 useless extension candidates. Maximal degree in co-relation 677. Up to 116 conditions per place. [2022-12-13 14:20:14,647 INFO L137 encePairwiseOnDemand]: 384/389 looper letters, 35 selfloop transitions, 13 changer transitions 2/50 dead transitions. [2022-12-13 14:20:14,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 363 flow [2022-12-13 14:20:14,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:20:14,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 14:20:14,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 979 transitions. [2022-12-13 14:20:14,650 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4194515852613539 [2022-12-13 14:20:14,650 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 979 transitions. [2022-12-13 14:20:14,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 979 transitions. [2022-12-13 14:20:14,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:20:14,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 979 transitions. [2022-12-13 14:20:14,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.16666666666666) internal successors, (979), 6 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:14,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 389.0) internal successors, (2723), 7 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:14,657 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 389.0) internal successors, (2723), 7 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:14,657 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 148 flow. Second operand 6 states and 979 transitions. [2022-12-13 14:20:14,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 363 flow [2022-12-13 14:20:14,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 332 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-12-13 14:20:14,660 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 209 flow [2022-12-13 14:20:14,660 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=209, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2022-12-13 14:20:14,661 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2022-12-13 14:20:14,661 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 209 flow [2022-12-13 14:20:14,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 158.77777777777777) internal successors, (1429), 9 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:14,662 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:20:14,662 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:20:14,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:20:14,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:20:14,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:20:14,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:20:14,865 INFO L85 PathProgramCache]: Analyzing trace with hash 891775216, now seen corresponding path program 1 times [2022-12-13 14:20:14,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:20:14,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073692138] [2022-12-13 14:20:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:20:14,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:20:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:15,151 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 14:20:15,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:20:15,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073692138] [2022-12-13 14:20:15,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073692138] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:20:15,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575088306] [2022-12-13 14:20:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:20:15,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:20:15,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:20:15,153 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:20:15,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:20:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:15,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 14:20:15,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:20:15,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 14:20:15,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:20:15,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:20:15,465 INFO L321 Elim1Store]: treesize reduction 23, result has 58.2 percent of original size [2022-12-13 14:20:15,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 54 [2022-12-13 14:20:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:20:15,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:20:15,644 WARN L837 $PredicateComparison]: unable to prove that (forall ((~x2~0 Int) (v_ArrVal_137 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_137) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ (* 4 (select .cse1 (+ c_~f~0.offset (* ~x2~0 4)))) c_~f~0.offset)))) (or (< .cse0 0) (<= c_~size~0 .cse0) (= (select .cse1 (+ (* .cse0 4) c_~f~0.offset)) (select .cse1 (+ (* c_~x1~0 4) c_~f~0.offset))))))) is different from false [2022-12-13 14:20:15,737 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:20:15,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 134 [2022-12-13 14:20:15,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:20:15,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 696 treesize of output 652 [2022-12-13 14:20:15,821 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:20:15,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 568 treesize of output 460 [2022-12-13 14:20:15,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:20:15,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 376 treesize of output 364 [2022-12-13 14:20:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:20:17,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575088306] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:20:17,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:20:17,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2022-12-13 14:20:17,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785191670] [2022-12-13 14:20:17,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:20:17,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:20:17,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:20:17,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:20:17,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=171, Unknown=1, NotChecked=26, Total=240 [2022-12-13 14:20:17,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 389 [2022-12-13 14:20:17,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 209 flow. Second operand has 16 states, 16 states have (on average 113.6875) internal successors, (1819), 16 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:17,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:20:17,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 389 [2022-12-13 14:20:17,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:20:19,126 INFO L130 PetriNetUnfolder]: 273/485 cut-off events. [2022-12-13 14:20:19,126 INFO L131 PetriNetUnfolder]: For 1082/1120 co-relation queries the response was YES. [2022-12-13 14:20:19,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 485 events. 273/485 cut-off events. For 1082/1120 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1953 event pairs, 10 based on Foata normal form. 58/537 useless extension candidates. Maximal degree in co-relation 1501. Up to 239 conditions per place. [2022-12-13 14:20:19,128 INFO L137 encePairwiseOnDemand]: 380/389 looper letters, 38 selfloop transitions, 22 changer transitions 81/143 dead transitions. [2022-12-13 14:20:19,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 143 transitions, 1055 flow [2022-12-13 14:20:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 14:20:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 14:20:19,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2673 transitions. [2022-12-13 14:20:19,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2987593606795574 [2022-12-13 14:20:19,134 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2673 transitions. [2022-12-13 14:20:19,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2673 transitions. [2022-12-13 14:20:19,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:20:19,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2673 transitions. [2022-12-13 14:20:19,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 116.21739130434783) internal successors, (2673), 23 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:19,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 389.0) internal successors, (9336), 24 states have internal predecessors, (9336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:19,147 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 389.0) internal successors, (9336), 24 states have internal predecessors, (9336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:19,147 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 209 flow. Second operand 23 states and 2673 transitions. [2022-12-13 14:20:19,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 143 transitions, 1055 flow [2022-12-13 14:20:19,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 143 transitions, 1010 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-12-13 14:20:19,151 INFO L231 Difference]: Finished difference. Result has 70 places, 42 transitions, 368 flow [2022-12-13 14:20:19,151 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=368, PETRI_PLACES=70, PETRI_TRANSITIONS=42} [2022-12-13 14:20:19,151 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 49 predicate places. [2022-12-13 14:20:19,151 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 42 transitions, 368 flow [2022-12-13 14:20:19,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 113.6875) internal successors, (1819), 16 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:19,152 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:20:19,152 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:20:19,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:20:19,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:20:19,353 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:20:19,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:20:19,353 INFO L85 PathProgramCache]: Analyzing trace with hash -855240149, now seen corresponding path program 2 times [2022-12-13 14:20:19,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:20:19,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093759895] [2022-12-13 14:20:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:20:19,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:20:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:20:20,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:20:20,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093759895] [2022-12-13 14:20:20,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093759895] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:20:20,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600371822] [2022-12-13 14:20:20,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:20:20,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:20:20,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:20:20,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:20:20,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:20:20,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:20:20,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:20:20,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 14:20:20,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:20:20,568 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 15 treesize of output 11 [2022-12-13 14:20:20,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:20:20,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:20:20,714 INFO L321 Elim1Store]: treesize reduction 29, result has 58.0 percent of original size [2022-12-13 14:20:20,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 66 [2022-12-13 14:20:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:20:20,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:20:20,909 WARN L837 $PredicateComparison]: unable to prove that (forall ((~x1~0 Int) (~x2~0 Int) (v_ArrVal_171 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_171) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ (* 4 (select .cse1 (+ c_~f~0.offset (* ~x2~0 4)))) c_~f~0.offset)))) (or (< ~x1~0 0) (<= c_~size~0 ~x1~0) (<= c_~size~0 .cse0) (< .cse0 0) (= (select .cse1 (+ (* ~x1~0 4) c_~f~0.offset)) (select .cse1 (+ (* .cse0 4) c_~f~0.offset))))))) is different from false [2022-12-13 14:20:21,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:20:21,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 134 [2022-12-13 14:20:21,095 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:20:21,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 332 treesize of output 352 [2022-12-13 14:20:21,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:20:21,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 340 treesize of output 304 [2022-12-13 14:20:21,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:20:21,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 133 treesize of output 169 [2022-12-13 14:20:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-13 14:20:23,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600371822] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:20:23,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:20:23,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-12-13 14:20:23,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680351675] [2022-12-13 14:20:23,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:20:23,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 14:20:23,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:20:23,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 14:20:23,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2022-12-13 14:20:23,441 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 389 [2022-12-13 14:20:23,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 42 transitions, 368 flow. Second operand has 17 states, 17 states have (on average 113.6470588235294) internal successors, (1932), 17 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:23,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:20:23,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 389 [2022-12-13 14:20:23,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:20:29,456 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 [] [2022-12-13 14:20:31,953 INFO L130 PetriNetUnfolder]: 223/410 cut-off events. [2022-12-13 14:20:31,953 INFO L131 PetriNetUnfolder]: For 2390/2411 co-relation queries the response was YES. [2022-12-13 14:20:31,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2417 conditions, 410 events. 223/410 cut-off events. For 2390/2411 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1579 event pairs, 4 based on Foata normal form. 48/457 useless extension candidates. Maximal degree in co-relation 2385. Up to 202 conditions per place. [2022-12-13 14:20:31,956 INFO L137 encePairwiseOnDemand]: 381/389 looper letters, 67 selfloop transitions, 29 changer transitions 30/128 dead transitions. [2022-12-13 14:20:31,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 128 transitions, 1291 flow [2022-12-13 14:20:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 14:20:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 14:20:31,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2550 transitions. [2022-12-13 14:20:31,960 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.29796681467632624 [2022-12-13 14:20:31,960 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2550 transitions. [2022-12-13 14:20:31,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2550 transitions. [2022-12-13 14:20:31,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:20:31,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2550 transitions. [2022-12-13 14:20:31,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 115.9090909090909) internal successors, (2550), 22 states have internal predecessors, (2550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:31,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 389.0) internal successors, (8947), 23 states have internal predecessors, (8947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:31,972 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 389.0) internal successors, (8947), 23 states have internal predecessors, (8947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:31,972 INFO L175 Difference]: Start difference. First operand has 70 places, 42 transitions, 368 flow. Second operand 22 states and 2550 transitions. [2022-12-13 14:20:31,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 128 transitions, 1291 flow [2022-12-13 14:20:31,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 128 transitions, 1032 flow, removed 115 selfloop flow, removed 14 redundant places. [2022-12-13 14:20:31,978 INFO L231 Difference]: Finished difference. Result has 76 places, 50 transitions, 478 flow [2022-12-13 14:20:31,978 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=478, PETRI_PLACES=76, PETRI_TRANSITIONS=50} [2022-12-13 14:20:31,979 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2022-12-13 14:20:31,979 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 50 transitions, 478 flow [2022-12-13 14:20:31,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 113.6470588235294) internal successors, (1932), 17 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:31,979 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:20:31,979 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:20:31,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:20:32,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:20:32,180 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:20:32,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:20:32,180 INFO L85 PathProgramCache]: Analyzing trace with hash 935873960, now seen corresponding path program 3 times [2022-12-13 14:20:32,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:20:32,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003446426] [2022-12-13 14:20:32,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:20:32,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:20:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:20:32,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:20:32,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003446426] [2022-12-13 14:20:32,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003446426] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:20:32,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706785914] [2022-12-13 14:20:32,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:20:32,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:20:32,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:20:32,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:20:32,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:20:32,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 14:20:32,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:20:32,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 14:20:32,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:20:32,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 14:20:32,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:20:32,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:20:32,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:20:32,970 INFO L321 Elim1Store]: treesize reduction 38, result has 20.8 percent of original size [2022-12-13 14:20:32,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 32 [2022-12-13 14:20:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:20:32,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:20:33,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:20:33,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 108 [2022-12-13 14:20:33,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:20:33,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 610 treesize of output 598 [2022-12-13 14:20:33,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:20:33,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 396 treesize of output 408 [2022-12-13 14:20:33,443 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:20:33,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 442 treesize of output 382 [2022-12-13 14:20:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:20:34,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706785914] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:20:34,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:20:34,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-12-13 14:20:34,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063996778] [2022-12-13 14:20:34,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:20:34,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 14:20:34,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:20:34,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 14:20:34,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=272, Unknown=4, NotChecked=0, Total=342 [2022-12-13 14:20:36,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:20:38,851 WARN L539 Checker$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 14:20:40,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:20:43,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:20:43,717 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 389 [2022-12-13 14:20:43,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 50 transitions, 478 flow. Second operand has 19 states, 19 states have (on average 123.52631578947368) internal successors, (2347), 19 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:43,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:20:43,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 389 [2022-12-13 14:20:43,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:20:44,234 INFO L130 PetriNetUnfolder]: 168/318 cut-off events. [2022-12-13 14:20:44,234 INFO L131 PetriNetUnfolder]: For 1881/1919 co-relation queries the response was YES. [2022-12-13 14:20:44,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1873 conditions, 318 events. 168/318 cut-off events. For 1881/1919 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1170 event pairs, 24 based on Foata normal form. 29/339 useless extension candidates. Maximal degree in co-relation 1847. Up to 200 conditions per place. [2022-12-13 14:20:44,236 INFO L137 encePairwiseOnDemand]: 383/389 looper letters, 29 selfloop transitions, 9 changer transitions 26/69 dead transitions. [2022-12-13 14:20:44,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 69 transitions, 710 flow [2022-12-13 14:20:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:20:44,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 14:20:44,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1010 transitions. [2022-12-13 14:20:44,238 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3245501285347044 [2022-12-13 14:20:44,238 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1010 transitions. [2022-12-13 14:20:44,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1010 transitions. [2022-12-13 14:20:44,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:20:44,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1010 transitions. [2022-12-13 14:20:44,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.25) internal successors, (1010), 8 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:44,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 389.0) internal successors, (3501), 9 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:44,242 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 389.0) internal successors, (3501), 9 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:44,243 INFO L175 Difference]: Start difference. First operand has 76 places, 50 transitions, 478 flow. Second operand 8 states and 1010 transitions. [2022-12-13 14:20:44,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 69 transitions, 710 flow [2022-12-13 14:20:44,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 620 flow, removed 27 selfloop flow, removed 14 redundant places. [2022-12-13 14:20:44,247 INFO L231 Difference]: Finished difference. Result has 66 places, 40 transitions, 328 flow [2022-12-13 14:20:44,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=328, PETRI_PLACES=66, PETRI_TRANSITIONS=40} [2022-12-13 14:20:44,248 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 45 predicate places. [2022-12-13 14:20:44,248 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 40 transitions, 328 flow [2022-12-13 14:20:44,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 123.52631578947368) internal successors, (2347), 19 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:44,248 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:20:44,249 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:20:44,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 14:20:44,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:20:44,450 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:20:44,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:20:44,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1914727591, now seen corresponding path program 4 times [2022-12-13 14:20:44,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:20:44,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468472566] [2022-12-13 14:20:44,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:20:44,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:20:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:45,671 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 14:20:45,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:20:45,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468472566] [2022-12-13 14:20:45,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468472566] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:20:45,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311825403] [2022-12-13 14:20:45,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:20:45,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:20:45,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:20:45,672 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:20:45,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:20:45,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:20:45,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:20:45,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 14:20:45,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:20:45,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:20:45,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2022-12-13 14:20:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:20:45,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:20:46,090 INFO L321 Elim1Store]: treesize reduction 15, result has 90.4 percent of original size [2022-12-13 14:20:46,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 177 [2022-12-13 14:20:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:20:46,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311825403] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:20:46,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:20:46,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2022-12-13 14:20:46,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982690586] [2022-12-13 14:20:46,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:20:46,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 14:20:46,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:20:46,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 14:20:46,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-12-13 14:20:47,396 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 389 [2022-12-13 14:20:47,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 40 transitions, 328 flow. Second operand has 20 states, 20 states have (on average 152.05) internal successors, (3041), 20 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:47,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:20:47,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 389 [2022-12-13 14:20:47,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:20:48,349 INFO L130 PetriNetUnfolder]: 498/884 cut-off events. [2022-12-13 14:20:48,349 INFO L131 PetriNetUnfolder]: For 4006/4076 co-relation queries the response was YES. [2022-12-13 14:20:48,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4747 conditions, 884 events. 498/884 cut-off events. For 4006/4076 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4146 event pairs, 21 based on Foata normal form. 66/940 useless extension candidates. Maximal degree in co-relation 4711. Up to 451 conditions per place. [2022-12-13 14:20:48,354 INFO L137 encePairwiseOnDemand]: 382/389 looper letters, 99 selfloop transitions, 95 changer transitions 2/201 dead transitions. [2022-12-13 14:20:48,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 201 transitions, 1957 flow [2022-12-13 14:20:48,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 14:20:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 14:20:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3286 transitions. [2022-12-13 14:20:48,358 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4022524176765822 [2022-12-13 14:20:48,358 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3286 transitions. [2022-12-13 14:20:48,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3286 transitions. [2022-12-13 14:20:48,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:20:48,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3286 transitions. [2022-12-13 14:20:48,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 156.47619047619048) internal successors, (3286), 21 states have internal predecessors, (3286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:48,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 389.0) internal successors, (8558), 22 states have internal predecessors, (8558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:48,370 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 389.0) internal successors, (8558), 22 states have internal predecessors, (8558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:48,370 INFO L175 Difference]: Start difference. First operand has 66 places, 40 transitions, 328 flow. Second operand 21 states and 3286 transitions. [2022-12-13 14:20:48,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 201 transitions, 1957 flow [2022-12-13 14:20:48,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 201 transitions, 1826 flow, removed 41 selfloop flow, removed 9 redundant places. [2022-12-13 14:20:48,378 INFO L231 Difference]: Finished difference. Result has 71 places, 128 transitions, 1421 flow [2022-12-13 14:20:48,378 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1421, PETRI_PLACES=71, PETRI_TRANSITIONS=128} [2022-12-13 14:20:48,378 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 50 predicate places. [2022-12-13 14:20:48,378 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 128 transitions, 1421 flow [2022-12-13 14:20:48,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 152.05) internal successors, (3041), 20 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:48,379 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:20:48,379 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:20:48,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 14:20:48,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:20:48,581 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:20:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:20:48,582 INFO L85 PathProgramCache]: Analyzing trace with hash 542572579, now seen corresponding path program 5 times [2022-12-13 14:20:48,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:20:48,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692902217] [2022-12-13 14:20:48,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:20:48,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:20:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:49,848 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 14:20:49,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:20:49,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692902217] [2022-12-13 14:20:49,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692902217] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:20:49,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520311466] [2022-12-13 14:20:49,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:20:49,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:20:49,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:20:49,849 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:20:49,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 14:20:49,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 14:20:49,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:20:49,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 14:20:49,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:20:50,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:20:50,126 INFO L321 Elim1Store]: treesize reduction 86, result has 30.6 percent of original size [2022-12-13 14:20:50,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 41 treesize of output 64 [2022-12-13 14:20:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:20:50,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:20:50,356 INFO L321 Elim1Store]: treesize reduction 15, result has 90.4 percent of original size [2022-12-13 14:20:50,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 177 [2022-12-13 14:20:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:20:50,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520311466] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:20:50,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:20:50,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 19 [2022-12-13 14:20:50,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122764552] [2022-12-13 14:20:50,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:20:50,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 14:20:50,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:20:50,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 14:20:50,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-12-13 14:20:52,146 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 389 [2022-12-13 14:20:52,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 128 transitions, 1421 flow. Second operand has 21 states, 21 states have (on average 146.95238095238096) internal successors, (3086), 21 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:52,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:20:52,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 389 [2022-12-13 14:20:52,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:20:53,297 INFO L130 PetriNetUnfolder]: 672/1201 cut-off events. [2022-12-13 14:20:53,298 INFO L131 PetriNetUnfolder]: For 5774/5829 co-relation queries the response was YES. [2022-12-13 14:20:53,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6582 conditions, 1201 events. 672/1201 cut-off events. For 5774/5829 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6111 event pairs, 81 based on Foata normal form. 50/1240 useless extension candidates. Maximal degree in co-relation 6041. Up to 732 conditions per place. [2022-12-13 14:20:53,305 INFO L137 encePairwiseOnDemand]: 382/389 looper letters, 128 selfloop transitions, 81 changer transitions 2/216 dead transitions. [2022-12-13 14:20:53,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 216 transitions, 2447 flow [2022-12-13 14:20:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 14:20:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 14:20:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3016 transitions. [2022-12-13 14:20:53,310 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3876606683804627 [2022-12-13 14:20:53,310 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3016 transitions. [2022-12-13 14:20:53,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3016 transitions. [2022-12-13 14:20:53,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:20:53,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3016 transitions. [2022-12-13 14:20:53,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 150.8) internal successors, (3016), 20 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:53,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 389.0) internal successors, (8169), 21 states have internal predecessors, (8169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:53,319 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 389.0) internal successors, (8169), 21 states have internal predecessors, (8169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:53,319 INFO L175 Difference]: Start difference. First operand has 71 places, 128 transitions, 1421 flow. Second operand 20 states and 3016 transitions. [2022-12-13 14:20:53,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 216 transitions, 2447 flow [2022-12-13 14:20:53,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 216 transitions, 2159 flow, removed 142 selfloop flow, removed 2 redundant places. [2022-12-13 14:20:53,332 INFO L231 Difference]: Finished difference. Result has 92 places, 157 transitions, 1740 flow [2022-12-13 14:20:53,332 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1740, PETRI_PLACES=92, PETRI_TRANSITIONS=157} [2022-12-13 14:20:53,332 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 71 predicate places. [2022-12-13 14:20:53,333 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 157 transitions, 1740 flow [2022-12-13 14:20:53,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 146.95238095238096) internal successors, (3086), 21 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:53,336 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:20:53,336 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:20:53,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 14:20:53,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:20:53,537 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:20:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:20:53,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1460020263, now seen corresponding path program 6 times [2022-12-13 14:20:53,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:20:53,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087904033] [2022-12-13 14:20:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:20:53,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:20:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:54,931 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 14:20:54,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:20:54,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087904033] [2022-12-13 14:20:54,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087904033] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:20:54,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505200184] [2022-12-13 14:20:54,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:20:54,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:20:54,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:20:54,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:20:54,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 14:20:55,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 14:20:55,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:20:55,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 14:20:55,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:20:55,185 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:20:55,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2022-12-13 14:20:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:20:55,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:20:55,435 INFO L321 Elim1Store]: treesize reduction 15, result has 90.4 percent of original size [2022-12-13 14:20:55,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 177 [2022-12-13 14:20:55,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:20:55,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505200184] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:20:55,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:20:55,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2022-12-13 14:20:55,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278338316] [2022-12-13 14:20:55,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:20:55,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 14:20:55,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:20:55,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 14:20:55,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-12-13 14:20:57,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 389 [2022-12-13 14:20:57,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 157 transitions, 1740 flow. Second operand has 20 states, 20 states have (on average 146.15) internal successors, (2923), 20 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:57,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:20:57,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 389 [2022-12-13 14:20:57,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:20:58,301 INFO L130 PetriNetUnfolder]: 888/1591 cut-off events. [2022-12-13 14:20:58,302 INFO L131 PetriNetUnfolder]: For 7284/7343 co-relation queries the response was YES. [2022-12-13 14:20:58,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8420 conditions, 1591 events. 888/1591 cut-off events. For 7284/7343 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8612 event pairs, 123 based on Foata normal form. 54/1634 useless extension candidates. Maximal degree in co-relation 8376. Up to 1081 conditions per place. [2022-12-13 14:20:58,310 INFO L137 encePairwiseOnDemand]: 382/389 looper letters, 152 selfloop transitions, 79 changer transitions 1/237 dead transitions. [2022-12-13 14:20:58,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 237 transitions, 2822 flow [2022-12-13 14:20:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 14:20:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 14:20:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2688 transitions. [2022-12-13 14:20:58,313 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3838903170522708 [2022-12-13 14:20:58,313 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2688 transitions. [2022-12-13 14:20:58,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2688 transitions. [2022-12-13 14:20:58,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:20:58,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2688 transitions. [2022-12-13 14:20:58,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 149.33333333333334) internal successors, (2688), 18 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 14:20:58,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 389.0) internal successors, (7391), 19 states have internal predecessors, (7391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:58,320 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 389.0) internal successors, (7391), 19 states have internal predecessors, (7391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:58,320 INFO L175 Difference]: Start difference. First operand has 92 places, 157 transitions, 1740 flow. Second operand 18 states and 2688 transitions. [2022-12-13 14:20:58,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 237 transitions, 2822 flow [2022-12-13 14:20:58,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 237 transitions, 2679 flow, removed 43 selfloop flow, removed 9 redundant places. [2022-12-13 14:20:58,340 INFO L231 Difference]: Finished difference. Result has 104 places, 191 transitions, 2298 flow [2022-12-13 14:20:58,340 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=1597, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2298, PETRI_PLACES=104, PETRI_TRANSITIONS=191} [2022-12-13 14:20:58,340 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2022-12-13 14:20:58,340 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 191 transitions, 2298 flow [2022-12-13 14:20:58,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 146.15) internal successors, (2923), 20 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:20:58,341 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:20:58,341 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:20:58,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 14:20:58,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 14:20:58,542 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:20:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:20:58,543 INFO L85 PathProgramCache]: Analyzing trace with hash -365572137, now seen corresponding path program 7 times [2022-12-13 14:20:58,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:20:58,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103350526] [2022-12-13 14:20:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:20:58,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:20:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:59,501 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 14:20:59,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:20:59,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103350526] [2022-12-13 14:20:59,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103350526] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:20:59,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852702338] [2022-12-13 14:20:59,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:20:59,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:20:59,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:20:59,503 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:20:59,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 14:20:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:20:59,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 14:20:59,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:20:59,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:20:59,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2022-12-13 14:20:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:20:59,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:20:59,937 INFO L321 Elim1Store]: treesize reduction 15, result has 90.4 percent of original size [2022-12-13 14:20:59,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 177 [2022-12-13 14:21:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:21:00,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852702338] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:21:00,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:21:00,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2022-12-13 14:21:00,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324116066] [2022-12-13 14:21:00,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:21:00,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 14:21:00,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:21:00,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 14:21:00,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-12-13 14:21:01,157 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 389 [2022-12-13 14:21:01,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 191 transitions, 2298 flow. Second operand has 20 states, 20 states have (on average 147.15) internal successors, (2943), 20 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:21:01,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:21:01,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 389 [2022-12-13 14:21:01,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:21:02,105 INFO L130 PetriNetUnfolder]: 1168/2099 cut-off events. [2022-12-13 14:21:02,105 INFO L131 PetriNetUnfolder]: For 10374/10437 co-relation queries the response was YES. [2022-12-13 14:21:02,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11468 conditions, 2099 events. 1168/2099 cut-off events. For 10374/10437 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12092 event pairs, 205 based on Foata normal form. 58/2146 useless extension candidates. Maximal degree in co-relation 11419. Up to 1481 conditions per place. [2022-12-13 14:21:02,117 INFO L137 encePairwiseOnDemand]: 383/389 looper letters, 212 selfloop transitions, 79 changer transitions 2/298 dead transitions. [2022-12-13 14:21:02,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 298 transitions, 3838 flow [2022-12-13 14:21:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 14:21:02,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 14:21:02,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3012 transitions. [2022-12-13 14:21:02,120 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.387146529562982 [2022-12-13 14:21:02,120 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3012 transitions. [2022-12-13 14:21:02,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3012 transitions. [2022-12-13 14:21:02,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:21:02,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3012 transitions. [2022-12-13 14:21:02,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 150.6) internal successors, (3012), 20 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:21:02,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 389.0) internal successors, (8169), 21 states have internal predecessors, (8169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:21:02,128 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 389.0) internal successors, (8169), 21 states have internal predecessors, (8169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:21:02,128 INFO L175 Difference]: Start difference. First operand has 104 places, 191 transitions, 2298 flow. Second operand 20 states and 3012 transitions. [2022-12-13 14:21:02,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 298 transitions, 3838 flow [2022-12-13 14:21:02,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 298 transitions, 3671 flow, removed 64 selfloop flow, removed 7 redundant places. [2022-12-13 14:21:02,166 INFO L231 Difference]: Finished difference. Result has 124 places, 239 transitions, 3140 flow [2022-12-13 14:21:02,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=2149, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3140, PETRI_PLACES=124, PETRI_TRANSITIONS=239} [2022-12-13 14:21:02,166 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 103 predicate places. [2022-12-13 14:21:02,166 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 239 transitions, 3140 flow [2022-12-13 14:21:02,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 147.15) internal successors, (2943), 20 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:21:02,167 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:21:02,167 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:21:02,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 14:21:02,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 14:21:02,368 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:21:02,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:21:02,369 INFO L85 PathProgramCache]: Analyzing trace with hash -836347417, now seen corresponding path program 8 times [2022-12-13 14:21:02,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:21:02,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73859792] [2022-12-13 14:21:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:02,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:21:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:21:03,906 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 14:21:03,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:21:03,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73859792] [2022-12-13 14:21:03,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73859792] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:21:03,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867810315] [2022-12-13 14:21:03,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:21:03,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:21:03,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:21:03,908 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:21:03,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 14:21:03,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:21:03,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:21:03,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 14:21:03,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:21:04,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:21:04,159 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 22 treesize of output 22 [2022-12-13 14:21:04,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:21:04,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2022-12-13 14:21:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:21:04,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:21:04,310 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_376 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) 4))) (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset))))) is different from false [2022-12-13 14:21:04,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:21:04,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 228 [2022-12-13 14:21:04,484 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:21:04,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 92 [2022-12-13 14:21:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:21:05,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867810315] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:21:05,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:21:05,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2022-12-13 14:21:05,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35016651] [2022-12-13 14:21:05,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:21:05,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:21:05,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:21:05,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:21:05,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=437, Unknown=3, NotChecked=42, Total=552 [2022-12-13 14:21:05,315 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 389 [2022-12-13 14:21:05,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 239 transitions, 3140 flow. Second operand has 24 states, 24 states have (on average 122.70833333333333) internal successors, (2945), 24 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:21:05,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:21:05,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 389 [2022-12-13 14:21:05,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:21:05,706 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* c_~x1~0 4) c_~f~0.offset))) (let ((.cse3 (select (select |c_#memory_int| c_~f~0.base) .cse1))) (let ((.cse0 (= c_~x2~0 .cse3))) (and (= c_~f~0.offset 0) (or (<= c_~x1~0 1) (<= c_~size~0 2)) .cse0 (or (and (not (= .cse1 0)) (not (= c_~x1~0 1))) .cse0) (forall ((v_ArrVal_376 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) c_~f~0.base))) (= (select .cse2 (+ c_~f~0.offset (* .cse3 4))) (select .cse2 (+ c_~f~0.offset (* (select .cse2 (+ (* (select .cse2 (+ (* c_~x2~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) 4)))))))))) is different from false [2022-12-13 14:21:05,867 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_376 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) 4))) (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset))))) (= c_~x1~0 c_~x2~0)) is different from false [2022-12-13 14:21:05,927 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| c_~f~0.base)) (.cse0 (+ (* c_~x1~0 4) c_~f~0.offset))) (let ((.cse1 (select .cse2 .cse0)) (.cse3 (select .cse2 (+ c_~f~0.offset (* (select .cse2 c_~f~0.offset) 4))))) (and (= c_~f~0.offset 0) (or (<= c_~x1~0 1) (<= c_~size~0 2)) (or (and (not (= .cse0 0)) (not (= c_~x1~0 1))) (= c_~x2~0 .cse1)) (= c_~x2~0 (select .cse2 (+ c_~f~0.offset (* .cse3 4)))) (forall ((v_ArrVal_376 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) c_~f~0.base))) (= (select .cse4 (+ c_~f~0.offset (* .cse1 4))) (select .cse4 (+ c_~f~0.offset (* (select .cse4 (+ (* (select .cse4 (+ (* c_~x2~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) 4)))))) (= c_~x1~0 .cse3)))) is different from false [2022-12-13 14:21:05,944 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)))) (and (= c_~x2~0 .cse0) (forall ((v_ArrVal_376 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_376) c_~f~0.base))) (= (select .cse1 (+ c_~f~0.offset (* .cse0 4))) (select .cse1 (+ c_~f~0.offset (* (select .cse1 (+ (* (select .cse1 (+ (* c_~x2~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) 4)))))))) is different from false [2022-12-13 14:21:06,428 INFO L130 PetriNetUnfolder]: 1302/2318 cut-off events. [2022-12-13 14:21:06,428 INFO L131 PetriNetUnfolder]: For 13814/13879 co-relation queries the response was YES. [2022-12-13 14:21:06,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13316 conditions, 2318 events. 1302/2318 cut-off events. For 13814/13879 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13437 event pairs, 230 based on Foata normal form. 58/2365 useless extension candidates. Maximal degree in co-relation 13258. Up to 2023 conditions per place. [2022-12-13 14:21:06,443 INFO L137 encePairwiseOnDemand]: 380/389 looper letters, 206 selfloop transitions, 133 changer transitions 1/345 dead transitions. [2022-12-13 14:21:06,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 345 transitions, 4991 flow [2022-12-13 14:21:06,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 14:21:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 14:21:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2885 transitions. [2022-12-13 14:21:06,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3224544540069297 [2022-12-13 14:21:06,446 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2885 transitions. [2022-12-13 14:21:06,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2885 transitions. [2022-12-13 14:21:06,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:21:06,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2885 transitions. [2022-12-13 14:21:06,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 125.43478260869566) internal successors, (2885), 23 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:21:06,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 389.0) internal successors, (9336), 24 states have internal predecessors, (9336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:21:06,453 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 389.0) internal successors, (9336), 24 states have internal predecessors, (9336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:21:06,453 INFO L175 Difference]: Start difference. First operand has 124 places, 239 transitions, 3140 flow. Second operand 23 states and 2885 transitions. [2022-12-13 14:21:06,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 345 transitions, 4991 flow [2022-12-13 14:21:06,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 345 transitions, 4745 flow, removed 106 selfloop flow, removed 6 redundant places. [2022-12-13 14:21:06,497 INFO L231 Difference]: Finished difference. Result has 148 places, 324 transitions, 4432 flow [2022-12-13 14:21:06,497 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=2900, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4432, PETRI_PLACES=148, PETRI_TRANSITIONS=324} [2022-12-13 14:21:06,498 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2022-12-13 14:21:06,498 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 324 transitions, 4432 flow [2022-12-13 14:21:06,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 122.70833333333333) internal successors, (2945), 24 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:21:06,498 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:21:06,498 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:21:06,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 14:21:06,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 14:21:06,700 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:21:06,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:21:06,701 INFO L85 PathProgramCache]: Analyzing trace with hash 740488907, now seen corresponding path program 9 times [2022-12-13 14:21:06,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:21:06,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399495053] [2022-12-13 14:21:06,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:21:06,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:21:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:21:08,252 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 14:21:08,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:21:08,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399495053] [2022-12-13 14:21:08,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399495053] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:21:08,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152198766] [2022-12-13 14:21:08,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:21:08,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:21:08,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:21:08,253 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:21:08,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 14:21:08,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 14:21:08,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:21:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 14:21:08,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:21:08,473 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 13 treesize of output 9 [2022-12-13 14:21:08,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:21:08,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:21:08,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 14:21:08,688 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-13 14:21:08,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 40 [2022-12-13 14:21:08,720 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 14:21:08,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:21:09,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:21:09,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 431 treesize of output 251 [2022-12-13 14:21:09,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:21:09,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 2358 treesize of output 2188 [2022-12-13 14:21:09,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:21:09,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 1772 treesize of output 1718 [2022-12-13 14:21:10,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:21:10,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 1462 treesize of output 1242 [2022-12-13 14:24:34,021 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 14:27:12,096 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 14:27:12,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152198766] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:27:12,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:27:12,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2022-12-13 14:27:12,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311771422] [2022-12-13 14:27:12,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:27:12,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 14:27:12,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:27:12,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 14:27:12,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=639, Unknown=2, NotChecked=0, Total=756 [2022-12-13 14:27:13,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 389 [2022-12-13 14:27:13,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 324 transitions, 4432 flow. Second operand has 28 states, 28 states have (on average 122.71428571428571) internal successors, (3436), 28 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:13,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:27:13,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 389 [2022-12-13 14:27:13,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:27:14,250 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~x1~0 4)) (.cse1 (* c_~x2~0 4))) (and (or (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~2#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (let ((.cse2 (< c_~size~0 2))) (and (or (= .cse0 .cse1) .cse2) (or .cse2 (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)))))) (forall ((v_ArrVal_414 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_414) c_~f~0.base))) (let ((.cse6 (select .cse4 (+ .cse1 c_~f~0.offset)))) (let ((.cse5 (select .cse4 (+ (* 4 .cse6) c_~f~0.offset))) (.cse3 (select .cse4 (+ c_~f~0.offset (* (select (select |c_#memory_int| c_~f~0.base) (+ .cse0 c_~f~0.offset)) 4))))) (or (<= c_~size~0 .cse3) (= (select .cse4 (+ (* .cse5 4) c_~f~0.offset)) (select .cse4 (+ c_~f~0.offset (* .cse3 4)))) (<= c_~size~0 .cse5) (< .cse5 0) (< .cse3 0) (not (<= 0 .cse6)) (not (< .cse6 c_~size~0))))))) (<= c_~x1~0 1) (<= 0 c_~x1~0) (= c_~x1~0 c_~x2~0))) is different from false [2022-12-13 14:27:14,661 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (+ (* c_~x1~0 4) c_~f~0.offset)) (.cse5 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (let ((.cse3 (select |c_#memory_int| c_~f~0.base))) (let ((.cse0 (select .cse3 .cse5))) (let ((.cse1 (select .cse3 (+ (* .cse0 4) c_~f~0.offset))) (.cse2 (select .cse3 .cse4))) (or (not (< .cse0 c_~size~0)) (< .cse1 0) (not (<= 0 .cse0)) (<= c_~size~0 .cse1) (<= c_~size~0 .cse2) (< .cse2 0) (= (select .cse3 (+ c_~f~0.offset (* 4 .cse1))) (select .cse3 (+ c_~f~0.offset (* .cse2 4)))))))) (forall ((v_ArrVal_414 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_414) c_~f~0.base))) (let ((.cse9 (select .cse8 .cse5))) (let ((.cse7 (select .cse8 (+ (* 4 .cse9) c_~f~0.offset))) (.cse6 (select .cse8 .cse4))) (or (< .cse6 0) (<= c_~size~0 .cse7) (< .cse7 0) (= (select .cse8 (+ (* .cse7 4) c_~f~0.offset)) (select .cse8 (+ c_~f~0.offset (* .cse6 4)))) (<= c_~size~0 .cse6) (not (<= 0 .cse9)) (not (< .cse9 c_~size~0))))))))) is different from false [2022-12-13 14:27:16,798 WARN L539 Checker$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 14:27:18,955 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 14:27:19,102 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| c_~f~0.base))) (let ((.cse3 (select .cse2 (+ (* c_~x1~0 4) c_~f~0.offset))) (.cse4 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (let ((.cse0 (select .cse2 .cse4))) (let ((.cse1 (select .cse2 (+ (* .cse0 4) c_~f~0.offset)))) (or (< c_~x1~0 0) (not (< .cse0 c_~size~0)) (< .cse1 0) (not (<= 0 .cse0)) (= (select .cse2 (+ c_~f~0.offset (* 4 .cse1))) .cse3) (<= c_~size~0 .cse1) (<= c_~size~0 c_~x1~0)))) (forall ((v_ArrVal_414 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_414) c_~f~0.base))) (let ((.cse8 (select .cse6 .cse4))) (let ((.cse7 (select .cse6 (+ (* 4 .cse8) c_~f~0.offset))) (.cse5 (select .cse6 (+ c_~f~0.offset (* .cse3 4))))) (or (<= c_~size~0 .cse5) (= (select .cse6 (+ (* .cse7 4) c_~f~0.offset)) (select .cse6 (+ c_~f~0.offset (* .cse5 4)))) (<= c_~size~0 .cse7) (< .cse7 0) (< .cse5 0) (not (<= 0 .cse8)) (not (< .cse8 c_~size~0))))))) (<= c_~x1~0 1) (<= 0 c_~x1~0) (= c_~x1~0 c_~x2~0)))) is different from false [2022-12-13 14:27:21,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:27:23,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:27:25,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:27:26,681 INFO L130 PetriNetUnfolder]: 1981/3535 cut-off events. [2022-12-13 14:27:26,681 INFO L131 PetriNetUnfolder]: For 31452/31583 co-relation queries the response was YES. [2022-12-13 14:27:26,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24456 conditions, 3535 events. 1981/3535 cut-off events. For 31452/31583 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 22588 event pairs, 254 based on Foata normal form. 116/3625 useless extension candidates. Maximal degree in co-relation 23618. Up to 2340 conditions per place. [2022-12-13 14:27:26,702 INFO L137 encePairwiseOnDemand]: 379/389 looper letters, 321 selfloop transitions, 241 changer transitions 5/572 dead transitions. [2022-12-13 14:27:26,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 572 transitions, 8735 flow [2022-12-13 14:27:26,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 14:27:26,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 14:27:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3668 transitions. [2022-12-13 14:27:26,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3251484797447035 [2022-12-13 14:27:26,706 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3668 transitions. [2022-12-13 14:27:26,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3668 transitions. [2022-12-13 14:27:26,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:27:26,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3668 transitions. [2022-12-13 14:27:26,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 126.48275862068965) internal successors, (3668), 29 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:26,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 389.0) internal successors, (11670), 30 states have internal predecessors, (11670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:26,715 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 389.0) internal successors, (11670), 30 states have internal predecessors, (11670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:26,715 INFO L175 Difference]: Start difference. First operand has 148 places, 324 transitions, 4432 flow. Second operand 29 states and 3668 transitions. [2022-12-13 14:27:26,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 572 transitions, 8735 flow [2022-12-13 14:27:26,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 572 transitions, 8092 flow, removed 307 selfloop flow, removed 5 redundant places. [2022-12-13 14:27:26,817 INFO L231 Difference]: Finished difference. Result has 183 places, 501 transitions, 7451 flow [2022-12-13 14:27:26,818 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=3993, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7451, PETRI_PLACES=183, PETRI_TRANSITIONS=501} [2022-12-13 14:27:26,818 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 162 predicate places. [2022-12-13 14:27:26,818 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 501 transitions, 7451 flow [2022-12-13 14:27:26,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 122.71428571428571) internal successors, (3436), 28 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:26,819 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:27:26,819 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:27:26,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 14:27:27,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 14:27:27,020 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:27:27,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:27:27,022 INFO L85 PathProgramCache]: Analyzing trace with hash -100968123, now seen corresponding path program 10 times [2022-12-13 14:27:27,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:27:27,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753120610] [2022-12-13 14:27:27,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:27:27,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:27:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:28,135 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 14:27:28,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:27:28,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753120610] [2022-12-13 14:27:28,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753120610] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:27:28,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886383010] [2022-12-13 14:27:28,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:27:28,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:27:28,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:27:28,137 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:27:28,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 14:27:28,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:27:28,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:27:28,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 14:27:28,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:27:28,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:27:28,355 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 22 treesize of output 22 [2022-12-13 14:27:28,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:27:28,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2022-12-13 14:27:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:27:28,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:27:28,492 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_449 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~f~0.base))) (= (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) (select .cse0 (+ (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset))))) 4) c_~f~0.offset))))) is different from false [2022-12-13 14:27:28,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:27:28,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 228 [2022-12-13 14:27:28,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:27:28,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 92 [2022-12-13 14:27:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:27:29,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886383010] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:27:29,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:27:29,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2022-12-13 14:27:29,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712147307] [2022-12-13 14:27:29,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:27:29,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:27:29,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:27:29,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:27:29,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=438, Unknown=7, NotChecked=42, Total=552 [2022-12-13 14:27:29,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 389 [2022-12-13 14:27:29,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 501 transitions, 7451 flow. Second operand has 24 states, 24 states have (on average 122.70833333333333) internal successors, (2945), 24 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:29,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:27:29,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 389 [2022-12-13 14:27:29,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:27:31,179 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| c_~f~0.base)) (.cse2 (+ (* c_~x2~0 4) c_~f~0.offset))) (and (forall ((v_ArrVal_449 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select .cse1 (+ (* c_~x1~0 4) c_~f~0.offset)) 4))) (select .cse0 (+ (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 .cse2)))) 4) c_~f~0.offset))))) (= (select .cse1 (+ c_~f~0.offset (* 4 (select .cse1 (+ (* (select .cse1 .cse2) 4) c_~f~0.offset))))) c_~x1~0))) is different from false [2022-12-13 14:27:32,396 INFO L130 PetriNetUnfolder]: 2399/4191 cut-off events. [2022-12-13 14:27:32,396 INFO L131 PetriNetUnfolder]: For 49570/49670 co-relation queries the response was YES. [2022-12-13 14:27:32,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32522 conditions, 4191 events. 2399/4191 cut-off events. For 49570/49670 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26944 event pairs, 273 based on Foata normal form. 86/4259 useless extension candidates. Maximal degree in co-relation 31660. Up to 3188 conditions per place. [2022-12-13 14:27:32,423 INFO L137 encePairwiseOnDemand]: 378/389 looper letters, 362 selfloop transitions, 362 changer transitions 3/732 dead transitions. [2022-12-13 14:27:32,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 732 transitions, 12576 flow [2022-12-13 14:27:32,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 14:27:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-13 14:27:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3278 transitions. [2022-12-13 14:27:32,427 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32410520071188453 [2022-12-13 14:27:32,428 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3278 transitions. [2022-12-13 14:27:32,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3278 transitions. [2022-12-13 14:27:32,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:27:32,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3278 transitions. [2022-12-13 14:27:32,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 126.07692307692308) internal successors, (3278), 26 states have internal predecessors, (3278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:32,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 389.0) internal successors, (10503), 27 states have internal predecessors, (10503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:32,437 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 389.0) internal successors, (10503), 27 states have internal predecessors, (10503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:32,437 INFO L175 Difference]: Start difference. First operand has 183 places, 501 transitions, 7451 flow. Second operand 26 states and 3278 transitions. [2022-12-13 14:27:32,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 732 transitions, 12576 flow [2022-12-13 14:27:32,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 732 transitions, 11864 flow, removed 340 selfloop flow, removed 8 redundant places. [2022-12-13 14:27:32,605 INFO L231 Difference]: Finished difference. Result has 211 places, 695 transitions, 11423 flow [2022-12-13 14:27:32,605 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=7033, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11423, PETRI_PLACES=211, PETRI_TRANSITIONS=695} [2022-12-13 14:27:32,606 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 190 predicate places. [2022-12-13 14:27:32,606 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 695 transitions, 11423 flow [2022-12-13 14:27:32,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 122.70833333333333) internal successors, (2945), 24 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:32,606 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:27:32,606 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:27:32,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 14:27:32,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:27:32,808 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:27:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:27:32,809 INFO L85 PathProgramCache]: Analyzing trace with hash 363475, now seen corresponding path program 11 times [2022-12-13 14:27:32,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:27:32,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153259750] [2022-12-13 14:27:32,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:27:32,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:27:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:33,965 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 14:27:33,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:27:33,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153259750] [2022-12-13 14:27:33,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153259750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:27:33,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845617506] [2022-12-13 14:27:33,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:27:33,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:27:33,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:27:33,967 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:27:33,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 14:27:34,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 14:27:34,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:27:34,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 14:27:34,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:27:34,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:27:34,270 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 30 treesize of output 28 [2022-12-13 14:27:34,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:27:34,362 INFO L321 Elim1Store]: treesize reduction 90, result has 27.4 percent of original size [2022-12-13 14:27:34,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 41 treesize of output 60 [2022-12-13 14:27:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:27:34,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:27:34,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:27:34,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 222 [2022-12-13 14:27:34,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:27:34,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 56 [2022-12-13 14:27:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:27:35,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845617506] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:27:35,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:27:35,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2022-12-13 14:27:35,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890588492] [2022-12-13 14:27:35,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:27:35,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:27:35,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:27:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:27:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=482, Unknown=3, NotChecked=0, Total=552 [2022-12-13 14:27:36,979 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 389 [2022-12-13 14:27:36,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 695 transitions, 11423 flow. Second operand has 24 states, 24 states have (on average 132.70833333333334) internal successors, (3185), 24 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:36,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:27:36,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 389 [2022-12-13 14:27:36,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:27:40,387 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 14:27:42,383 INFO L130 PetriNetUnfolder]: 2990/5348 cut-off events. [2022-12-13 14:27:42,383 INFO L131 PetriNetUnfolder]: For 85413/85543 co-relation queries the response was YES. [2022-12-13 14:27:42,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45488 conditions, 5348 events. 2990/5348 cut-off events. For 85413/85543 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 37148 event pairs, 303 based on Foata normal form. 118/5448 useless extension candidates. Maximal degree in co-relation 44480. Up to 2573 conditions per place. [2022-12-13 14:27:42,436 INFO L137 encePairwiseOnDemand]: 383/389 looper letters, 370 selfloop transitions, 517 changer transitions 5/897 dead transitions. [2022-12-13 14:27:42,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 897 transitions, 16462 flow [2022-12-13 14:27:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 14:27:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-13 14:27:42,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3162 transitions. [2022-12-13 14:27:42,439 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3534145523639209 [2022-12-13 14:27:42,440 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3162 transitions. [2022-12-13 14:27:42,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3162 transitions. [2022-12-13 14:27:42,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:27:42,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3162 transitions. [2022-12-13 14:27:42,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 137.47826086956522) internal successors, (3162), 23 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:42,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 389.0) internal successors, (9336), 24 states have internal predecessors, (9336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:42,447 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 389.0) internal successors, (9336), 24 states have internal predecessors, (9336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:42,447 INFO L175 Difference]: Start difference. First operand has 211 places, 695 transitions, 11423 flow. Second operand 23 states and 3162 transitions. [2022-12-13 14:27:42,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 897 transitions, 16462 flow [2022-12-13 14:27:42,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 897 transitions, 14360 flow, removed 974 selfloop flow, removed 11 redundant places. [2022-12-13 14:27:42,807 INFO L231 Difference]: Finished difference. Result has 229 places, 798 transitions, 13170 flow [2022-12-13 14:27:42,807 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=9553, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=431, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=13170, PETRI_PLACES=229, PETRI_TRANSITIONS=798} [2022-12-13 14:27:42,808 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 208 predicate places. [2022-12-13 14:27:42,808 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 798 transitions, 13170 flow [2022-12-13 14:27:42,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 132.70833333333334) internal successors, (3185), 24 states have internal predecessors, (3185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:27:42,808 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:27:42,808 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:27:42,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 14:27:43,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 14:27:43,009 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:27:43,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:27:43,010 INFO L85 PathProgramCache]: Analyzing trace with hash -364531113, now seen corresponding path program 12 times [2022-12-13 14:27:43,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:27:43,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118866521] [2022-12-13 14:27:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:27:43,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:27:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:27:45,428 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 14:27:45,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:27:45,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118866521] [2022-12-13 14:27:45,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118866521] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:27:45,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611750081] [2022-12-13 14:27:45,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:27:45,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:27:45,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:27:45,429 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:27:45,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 14:27:45,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 14:27:45,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:27:45,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-13 14:27:45,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:27:45,701 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 15 treesize of output 11 [2022-12-13 14:27:45,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:27:45,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:27:45,895 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 22 treesize of output 22 [2022-12-13 14:27:46,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:27:46,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2022-12-13 14:27:46,054 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 14:27:46,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:27:46,596 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:27:46,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 362 treesize of output 206 [2022-12-13 14:27:46,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:27:46,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 686 treesize of output 814 [2022-12-13 14:27:46,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:27:46,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 428 treesize of output 440 [2022-12-13 14:27:47,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:27:47,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 496 treesize of output 528 [2022-12-13 14:28:02,809 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 14:28:02,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611750081] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:28:02,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:28:02,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2022-12-13 14:28:02,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243844193] [2022-12-13 14:28:02,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:28:02,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 14:28:02,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:28:02,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 14:28:02,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=759, Unknown=1, NotChecked=0, Total=870 [2022-12-13 14:28:09,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:28:09,499 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 389 [2022-12-13 14:28:09,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 798 transitions, 13170 flow. Second operand has 30 states, 30 states have (on average 105.66666666666667) internal successors, (3170), 30 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:09,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:28:09,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 389 [2022-12-13 14:28:09,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:28:11,626 WARN L539 Checker$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 14:28:15,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:28:22,280 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:28:27,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:28:30,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:28:32,168 INFO L130 PetriNetUnfolder]: 3382/6012 cut-off events. [2022-12-13 14:28:32,168 INFO L131 PetriNetUnfolder]: For 98388/98388 co-relation queries the response was YES. [2022-12-13 14:28:32,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49216 conditions, 6012 events. 3382/6012 cut-off events. For 98388/98388 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 42046 event pairs, 607 based on Foata normal form. 3/6015 useless extension candidates. Maximal degree in co-relation 48141. Up to 5064 conditions per place. [2022-12-13 14:28:32,210 INFO L137 encePairwiseOnDemand]: 379/389 looper letters, 658 selfloop transitions, 294 changer transitions 2/954 dead transitions. [2022-12-13 14:28:32,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 954 transitions, 17236 flow [2022-12-13 14:28:32,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 14:28:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 14:28:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3069 transitions. [2022-12-13 14:28:32,214 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.28176643408005875 [2022-12-13 14:28:32,214 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3069 transitions. [2022-12-13 14:28:32,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3069 transitions. [2022-12-13 14:28:32,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:28:32,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3069 transitions. [2022-12-13 14:28:32,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 109.60714285714286) internal successors, (3069), 28 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:32,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 389.0) internal successors, (11281), 29 states have internal predecessors, (11281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:32,223 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 389.0) internal successors, (11281), 29 states have internal predecessors, (11281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:32,223 INFO L175 Difference]: Start difference. First operand has 229 places, 798 transitions, 13170 flow. Second operand 28 states and 3069 transitions. [2022-12-13 14:28:32,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 954 transitions, 17236 flow [2022-12-13 14:28:32,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 954 transitions, 16602 flow, removed 258 selfloop flow, removed 9 redundant places. [2022-12-13 14:28:32,694 INFO L231 Difference]: Finished difference. Result has 257 places, 868 transitions, 14828 flow [2022-12-13 14:28:32,695 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=12639, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=14828, PETRI_PLACES=257, PETRI_TRANSITIONS=868} [2022-12-13 14:28:32,695 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 236 predicate places. [2022-12-13 14:28:32,695 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 868 transitions, 14828 flow [2022-12-13 14:28:32,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 105.66666666666667) internal successors, (3170), 30 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:32,695 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:28:32,696 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:28:32,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 14:28:32,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 14:28:32,897 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:28:32,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:28:32,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1514484547, now seen corresponding path program 13 times [2022-12-13 14:28:32,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:28:32,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582628392] [2022-12-13 14:28:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:28:32,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:28:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:28:34,179 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 14:28:34,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:28:34,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582628392] [2022-12-13 14:28:34,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582628392] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:28:34,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560558271] [2022-12-13 14:28:34,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:28:34,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:28:34,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:28:34,181 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:28:34,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 14:28:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:28:34,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 14:28:34,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:28:34,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:28:34,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 14:28:34,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:28:34,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2022-12-13 14:28:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:28:34,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:28:34,653 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_557 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_557) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4) c_~f~0.offset))))) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) 4)))))) is different from false [2022-12-13 14:28:34,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:28:34,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 234 [2022-12-13 14:28:34,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:28:34,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 140 [2022-12-13 14:28:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:28:36,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560558271] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:28:36,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:28:36,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2022-12-13 14:28:36,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310525571] [2022-12-13 14:28:36,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:28:36,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:28:36,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:28:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:28:36,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=442, Unknown=1, NotChecked=42, Total=552 [2022-12-13 14:28:36,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 389 [2022-12-13 14:28:36,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 868 transitions, 14828 flow. Second operand has 24 states, 24 states have (on average 122.79166666666667) internal successors, (2947), 24 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:36,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:28:36,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 389 [2022-12-13 14:28:36,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:28:44,973 INFO L130 PetriNetUnfolder]: 3392/6101 cut-off events. [2022-12-13 14:28:44,974 INFO L131 PetriNetUnfolder]: For 98459/98579 co-relation queries the response was YES. [2022-12-13 14:28:44,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50887 conditions, 6101 events. 3392/6101 cut-off events. For 98459/98579 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 43904 event pairs, 484 based on Foata normal form. 105/6190 useless extension candidates. Maximal degree in co-relation 49657. Up to 4729 conditions per place. [2022-12-13 14:28:45,018 INFO L137 encePairwiseOnDemand]: 380/389 looper letters, 723 selfloop transitions, 251 changer transitions 2/985 dead transitions. [2022-12-13 14:28:45,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 985 transitions, 18848 flow [2022-12-13 14:28:45,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 14:28:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-13 14:28:45,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2653 transitions. [2022-12-13 14:28:45,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32476435304198803 [2022-12-13 14:28:45,021 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2653 transitions. [2022-12-13 14:28:45,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2653 transitions. [2022-12-13 14:28:45,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:28:45,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2653 transitions. [2022-12-13 14:28:45,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 126.33333333333333) internal successors, (2653), 21 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:45,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 389.0) internal successors, (8558), 22 states have internal predecessors, (8558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:45,027 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 389.0) internal successors, (8558), 22 states have internal predecessors, (8558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:45,027 INFO L175 Difference]: Start difference. First operand has 257 places, 868 transitions, 14828 flow. Second operand 21 states and 2653 transitions. [2022-12-13 14:28:45,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 985 transitions, 18848 flow [2022-12-13 14:28:45,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 985 transitions, 18609 flow, removed 74 selfloop flow, removed 12 redundant places. [2022-12-13 14:28:45,549 INFO L231 Difference]: Finished difference. Result has 272 places, 927 transitions, 16830 flow [2022-12-13 14:28:45,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=14599, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=16830, PETRI_PLACES=272, PETRI_TRANSITIONS=927} [2022-12-13 14:28:45,550 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 251 predicate places. [2022-12-13 14:28:45,550 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 927 transitions, 16830 flow [2022-12-13 14:28:45,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 122.79166666666667) internal successors, (2947), 24 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:45,551 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:28:45,551 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:28:45,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 14:28:45,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:28:45,752 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:28:45,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:28:45,753 INFO L85 PathProgramCache]: Analyzing trace with hash 223023938, now seen corresponding path program 14 times [2022-12-13 14:28:45,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:28:45,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708762229] [2022-12-13 14:28:45,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:28:45,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:28:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:28:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:28:45,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:28:45,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708762229] [2022-12-13 14:28:45,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708762229] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:28:45,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577075877] [2022-12-13 14:28:45,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:28:45,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:28:45,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:28:45,950 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:28:45,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 14:28:46,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:28:46,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:28:46,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 14:28:46,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:28:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:28:46,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:28:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:28:46,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577075877] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:28:46,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:28:46,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-13 14:28:46,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367649305] [2022-12-13 14:28:46,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:28:46,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 14:28:46,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:28:46,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 14:28:46,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-12-13 14:28:47,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 389 [2022-12-13 14:28:47,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 927 transitions, 16830 flow. Second operand has 18 states, 18 states have (on average 158.05555555555554) internal successors, (2845), 18 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:47,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:28:47,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 389 [2022-12-13 14:28:47,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:28:52,220 INFO L130 PetriNetUnfolder]: 4367/8009 cut-off events. [2022-12-13 14:28:52,220 INFO L131 PetriNetUnfolder]: For 163848/163848 co-relation queries the response was YES. [2022-12-13 14:28:52,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70565 conditions, 8009 events. 4367/8009 cut-off events. For 163848/163848 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 61467 event pairs, 514 based on Foata normal form. 44/8053 useless extension candidates. Maximal degree in co-relation 69198. Up to 2752 conditions per place. [2022-12-13 14:28:52,282 INFO L137 encePairwiseOnDemand]: 383/389 looper letters, 795 selfloop transitions, 567 changer transitions 40/1402 dead transitions. [2022-12-13 14:28:52,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 1402 transitions, 28609 flow [2022-12-13 14:28:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 14:28:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-13 14:28:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4031 transitions. [2022-12-13 14:28:52,286 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4144987146529563 [2022-12-13 14:28:52,287 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4031 transitions. [2022-12-13 14:28:52,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4031 transitions. [2022-12-13 14:28:52,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:28:52,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4031 transitions. [2022-12-13 14:28:52,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 161.24) internal successors, (4031), 25 states have internal predecessors, (4031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:52,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 389.0) internal successors, (10114), 26 states have internal predecessors, (10114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:52,295 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 389.0) internal successors, (10114), 26 states have internal predecessors, (10114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:52,295 INFO L175 Difference]: Start difference. First operand has 272 places, 927 transitions, 16830 flow. Second operand 25 states and 4031 transitions. [2022-12-13 14:28:52,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 1402 transitions, 28609 flow [2022-12-13 14:28:53,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 1402 transitions, 27974 flow, removed 272 selfloop flow, removed 8 redundant places. [2022-12-13 14:28:53,023 INFO L231 Difference]: Finished difference. Result has 298 places, 1146 transitions, 22299 flow [2022-12-13 14:28:53,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=16456, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=22299, PETRI_PLACES=298, PETRI_TRANSITIONS=1146} [2022-12-13 14:28:53,024 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 277 predicate places. [2022-12-13 14:28:53,024 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 1146 transitions, 22299 flow [2022-12-13 14:28:53,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 158.05555555555554) internal successors, (2845), 18 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:28:53,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:28:53,024 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:28:53,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 14:28:53,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:28:53,226 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:28:53,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:28:53,227 INFO L85 PathProgramCache]: Analyzing trace with hash -624592572, now seen corresponding path program 15 times [2022-12-13 14:28:53,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:28:53,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446851243] [2022-12-13 14:28:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:28:53,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:28:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:28:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:28:55,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:28:55,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446851243] [2022-12-13 14:28:55,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446851243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:28:55,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777824554] [2022-12-13 14:28:55,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:28:55,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:28:55,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:28:55,916 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:28:55,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 14:28:56,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 14:28:56,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:28:56,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 14:28:56,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:28:56,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:28:56,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 14:28:56,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:28:56,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2022-12-13 14:28:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 14:28:56,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:28:56,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:28:56,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 234 [2022-12-13 14:28:56,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:28:56,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 140 [2022-12-13 14:28:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 14:28:58,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777824554] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:28:58,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:28:58,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 24 [2022-12-13 14:28:58,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930239108] [2022-12-13 14:28:58,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:28:58,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 14:28:58,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:28:58,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 14:28:58,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=569, Unknown=4, NotChecked=0, Total=650 [2022-12-13 14:29:00,479 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 14:29:01,609 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 389 [2022-12-13 14:29:01,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 1146 transitions, 22299 flow. Second operand has 26 states, 26 states have (on average 122.73076923076923) internal successors, (3191), 26 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:01,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:29:01,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 389 [2022-12-13 14:29:01,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:29:06,197 INFO L130 PetriNetUnfolder]: 4303/7937 cut-off events. [2022-12-13 14:29:06,197 INFO L131 PetriNetUnfolder]: For 179331/179562 co-relation queries the response was YES. [2022-12-13 14:29:06,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75851 conditions, 7937 events. 4303/7937 cut-off events. For 179331/179562 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 61163 event pairs, 690 based on Foata normal form. 48/7939 useless extension candidates. Maximal degree in co-relation 75619. Up to 7076 conditions per place. [2022-12-13 14:29:06,280 INFO L137 encePairwiseOnDemand]: 382/389 looper letters, 1040 selfloop transitions, 218 changer transitions 1/1274 dead transitions. [2022-12-13 14:29:06,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 1274 transitions, 27050 flow [2022-12-13 14:29:06,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 14:29:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-13 14:29:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2401 transitions. [2022-12-13 14:29:06,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32485455283452846 [2022-12-13 14:29:06,285 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2401 transitions. [2022-12-13 14:29:06,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2401 transitions. [2022-12-13 14:29:06,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:29:06,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2401 transitions. [2022-12-13 14:29:06,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 126.36842105263158) internal successors, (2401), 19 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:06,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 389.0) internal successors, (7780), 20 states have internal predecessors, (7780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:06,293 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 389.0) internal successors, (7780), 20 states have internal predecessors, (7780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:06,293 INFO L175 Difference]: Start difference. First operand has 298 places, 1146 transitions, 22299 flow. Second operand 19 states and 2401 transitions. [2022-12-13 14:29:06,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 1274 transitions, 27050 flow [2022-12-13 14:29:07,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 1274 transitions, 26283 flow, removed 195 selfloop flow, removed 5 redundant places. [2022-12-13 14:29:07,352 INFO L231 Difference]: Finished difference. Result has 315 places, 1218 transitions, 23718 flow [2022-12-13 14:29:07,353 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=21638, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=974, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=23718, PETRI_PLACES=315, PETRI_TRANSITIONS=1218} [2022-12-13 14:29:07,353 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 294 predicate places. [2022-12-13 14:29:07,353 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 1218 transitions, 23718 flow [2022-12-13 14:29:07,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 122.73076923076923) internal successors, (3191), 26 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:07,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:29:07,354 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:29:07,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 14:29:07,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 14:29:07,554 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:29:07,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:29:07,555 INFO L85 PathProgramCache]: Analyzing trace with hash -954648542, now seen corresponding path program 16 times [2022-12-13 14:29:07,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:29:07,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114017671] [2022-12-13 14:29:07,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:29:07,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:29:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:29:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:29:07,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:29:07,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114017671] [2022-12-13 14:29:07,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114017671] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:29:07,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920959576] [2022-12-13 14:29:07,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 14:29:07,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:29:07,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:29:07,692 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:29:07,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 14:29:07,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 14:29:07,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:29:07,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 14:29:07,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:29:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:29:07,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:29:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:29:08,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920959576] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:29:08,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:29:08,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 14:29:08,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95527772] [2022-12-13 14:29:08,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:29:08,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:29:08,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:29:08,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:29:08,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:29:08,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 389 [2022-12-13 14:29:08,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 1218 transitions, 23718 flow. Second operand has 16 states, 16 states have (on average 158.0625) internal successors, (2529), 16 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:08,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:29:08,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 389 [2022-12-13 14:29:08,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:29:13,518 INFO L130 PetriNetUnfolder]: 4497/8413 cut-off events. [2022-12-13 14:29:13,518 INFO L131 PetriNetUnfolder]: For 199559/199559 co-relation queries the response was YES. [2022-12-13 14:29:13,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79437 conditions, 8413 events. 4497/8413 cut-off events. For 199559/199559 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 66515 event pairs, 488 based on Foata normal form. 108/8521 useless extension candidates. Maximal degree in co-relation 78335. Up to 2889 conditions per place. [2022-12-13 14:29:13,593 INFO L137 encePairwiseOnDemand]: 383/389 looper letters, 872 selfloop transitions, 569 changer transitions 43/1484 dead transitions. [2022-12-13 14:29:13,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1484 transitions, 31900 flow [2022-12-13 14:29:13,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 14:29:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 14:29:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2587 transitions. [2022-12-13 14:29:13,598 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4156491002570694 [2022-12-13 14:29:13,598 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2587 transitions. [2022-12-13 14:29:13,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2587 transitions. [2022-12-13 14:29:13,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:29:13,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2587 transitions. [2022-12-13 14:29:13,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 161.6875) internal successors, (2587), 16 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:13,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 389.0) internal successors, (6613), 17 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:13,606 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 389.0) internal successors, (6613), 17 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:13,606 INFO L175 Difference]: Start difference. First operand has 315 places, 1218 transitions, 23718 flow. Second operand 16 states and 2587 transitions. [2022-12-13 14:29:13,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1484 transitions, 31900 flow [2022-12-13 14:29:14,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1484 transitions, 31531 flow, removed 176 selfloop flow, removed 5 redundant places. [2022-12-13 14:29:14,693 INFO L231 Difference]: Finished difference. Result has 331 places, 1255 transitions, 25921 flow [2022-12-13 14:29:14,693 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=23324, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=513, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=25921, PETRI_PLACES=331, PETRI_TRANSITIONS=1255} [2022-12-13 14:29:14,693 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 310 predicate places. [2022-12-13 14:29:14,694 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 1255 transitions, 25921 flow [2022-12-13 14:29:14,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 158.0625) internal successors, (2529), 16 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:14,694 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:29:14,694 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:29:14,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 14:29:14,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:29:14,895 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:29:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:29:14,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2030254788, now seen corresponding path program 17 times [2022-12-13 14:29:14,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:29:14,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180758465] [2022-12-13 14:29:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:29:14,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:29:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:29:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:29:15,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:29:15,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180758465] [2022-12-13 14:29:15,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180758465] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:29:15,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041602452] [2022-12-13 14:29:15,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 14:29:15,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:29:15,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:29:15,049 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:29:15,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 14:29:15,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-13 14:29:15,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:29:15,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 14:29:15,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:29:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:29:15,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:29:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:29:15,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041602452] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:29:15,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:29:15,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 14:29:15,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111918689] [2022-12-13 14:29:15,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:29:15,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:29:15,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:29:15,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:29:15,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:29:15,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 389 [2022-12-13 14:29:15,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 1255 transitions, 25921 flow. Second operand has 16 states, 16 states have (on average 158.125) internal successors, (2530), 16 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:15,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:29:15,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 389 [2022-12-13 14:29:15,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:29:23,224 INFO L130 PetriNetUnfolder]: 8009/14711 cut-off events. [2022-12-13 14:29:23,224 INFO L131 PetriNetUnfolder]: For 376260/376260 co-relation queries the response was YES. [2022-12-13 14:29:23,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148387 conditions, 14711 events. 8009/14711 cut-off events. For 376260/376260 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 121726 event pairs, 964 based on Foata normal form. 188/14899 useless extension candidates. Maximal degree in co-relation 148232. Up to 5088 conditions per place. [2022-12-13 14:29:23,384 INFO L137 encePairwiseOnDemand]: 384/389 looper letters, 1168 selfloop transitions, 891 changer transitions 2/2061 dead transitions. [2022-12-13 14:29:23,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 2061 transitions, 45252 flow [2022-12-13 14:29:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 14:29:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 14:29:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2952 transitions. [2022-12-13 14:29:23,388 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42159383033419023 [2022-12-13 14:29:23,388 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2952 transitions. [2022-12-13 14:29:23,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2952 transitions. [2022-12-13 14:29:23,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:29:23,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2952 transitions. [2022-12-13 14:29:23,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 164.0) internal successors, (2952), 18 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:23,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 389.0) internal successors, (7391), 19 states have internal predecessors, (7391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:23,394 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 389.0) internal successors, (7391), 19 states have internal predecessors, (7391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:23,394 INFO L175 Difference]: Start difference. First operand has 331 places, 1255 transitions, 25921 flow. Second operand 18 states and 2952 transitions. [2022-12-13 14:29:23,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 2061 transitions, 45252 flow [2022-12-13 14:29:25,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 2061 transitions, 42721 flow, removed 857 selfloop flow, removed 12 redundant places. [2022-12-13 14:29:26,016 INFO L231 Difference]: Finished difference. Result has 344 places, 1621 transitions, 34957 flow [2022-12-13 14:29:26,017 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=23471, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=604, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=34957, PETRI_PLACES=344, PETRI_TRANSITIONS=1621} [2022-12-13 14:29:26,017 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 323 predicate places. [2022-12-13 14:29:26,018 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1621 transitions, 34957 flow [2022-12-13 14:29:26,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 158.125) internal successors, (2530), 16 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:26,018 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:29:26,018 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:29:26,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-13 14:29:26,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 14:29:26,219 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:29:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:29:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1605409596, now seen corresponding path program 18 times [2022-12-13 14:29:26,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:29:26,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960350895] [2022-12-13 14:29:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:29:26,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:29:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:29:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:29:26,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:29:26,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960350895] [2022-12-13 14:29:26,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960350895] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:29:26,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274733402] [2022-12-13 14:29:26,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 14:29:26,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:29:26,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:29:26,364 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:29:26,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 14:29:26,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 14:29:26,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:29:26,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 14:29:26,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:29:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:29:26,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:29:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:29:26,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274733402] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:29:26,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:29:26,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 14:29:26,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295575542] [2022-12-13 14:29:26,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:29:26,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 14:29:26,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:29:26,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 14:29:26,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:29:27,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 389 [2022-12-13 14:29:27,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1621 transitions, 34957 flow. Second operand has 16 states, 16 states have (on average 157.9375) internal successors, (2527), 16 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:29:27,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:29:27,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 389 [2022-12-13 14:29:27,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:30:13,991 INFO L130 PetriNetUnfolder]: 8570/15694 cut-off events. [2022-12-13 14:30:13,992 INFO L131 PetriNetUnfolder]: For 443761/443761 co-relation queries the response was YES. [2022-12-13 14:30:14,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163205 conditions, 15694 events. 8570/15694 cut-off events. For 443761/443761 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 131033 event pairs, 975 based on Foata normal form. 168/15862 useless extension candidates. Maximal degree in co-relation 161710. Up to 5536 conditions per place. [2022-12-13 14:30:14,211 INFO L137 encePairwiseOnDemand]: 384/389 looper letters, 1291 selfloop transitions, 1037 changer transitions 2/2330 dead transitions. [2022-12-13 14:30:14,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 2330 transitions, 52039 flow [2022-12-13 14:30:14,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 14:30:14,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-13 14:30:14,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4731 transitions. [2022-12-13 14:30:14,215 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4193777147416009 [2022-12-13 14:30:14,215 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4731 transitions. [2022-12-13 14:30:14,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4731 transitions. [2022-12-13 14:30:14,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:30:14,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4731 transitions. [2022-12-13 14:30:14,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 163.13793103448276) internal successors, (4731), 29 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:30:14,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 389.0) internal successors, (11670), 30 states have internal predecessors, (11670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:30:14,225 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 389.0) internal successors, (11670), 30 states have internal predecessors, (11670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:30:14,226 INFO L175 Difference]: Start difference. First operand has 344 places, 1621 transitions, 34957 flow. Second operand 29 states and 4731 transitions. [2022-12-13 14:30:14,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 2330 transitions, 52039 flow [2022-12-13 14:30:17,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 2330 transitions, 50145 flow, removed 606 selfloop flow, removed 5 redundant places. [2022-12-13 14:30:17,879 INFO L231 Difference]: Finished difference. Result has 378 places, 1789 transitions, 39428 flow [2022-12-13 14:30:17,879 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=33431, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=869, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=39428, PETRI_PLACES=378, PETRI_TRANSITIONS=1789} [2022-12-13 14:30:17,880 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 357 predicate places. [2022-12-13 14:30:17,880 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 1789 transitions, 39428 flow [2022-12-13 14:30:17,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 157.9375) internal successors, (2527), 16 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:30:17,880 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:30:17,880 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:30:17,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-13 14:30:18,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 14:30:18,082 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:30:18,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:30:18,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1633288400, now seen corresponding path program 19 times [2022-12-13 14:30:18,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:30:18,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712478074] [2022-12-13 14:30:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:30:18,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:30:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:30:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:30:18,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:30:18,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712478074] [2022-12-13 14:30:18,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712478074] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:30:18,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170387738] [2022-12-13 14:30:18,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 14:30:18,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:30:18,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:30:18,241 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:30:18,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 14:30:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:30:18,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 14:30:18,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:30:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:30:18,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:30:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:30:18,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170387738] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:30:18,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:30:18,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-13 14:30:18,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661225666] [2022-12-13 14:30:18,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:30:18,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 14:30:18,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:30:18,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 14:30:18,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-12-13 14:30:19,127 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 389 [2022-12-13 14:30:19,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1789 transitions, 39428 flow. Second operand has 20 states, 20 states have (on average 157.65) internal successors, (3153), 20 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:30:19,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:30:19,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 389 [2022-12-13 14:30:19,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:30:29,924 INFO L130 PetriNetUnfolder]: 8805/16135 cut-off events. [2022-12-13 14:30:29,924 INFO L131 PetriNetUnfolder]: For 522647/522647 co-relation queries the response was YES. [2022-12-13 14:30:30,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174154 conditions, 16135 events. 8805/16135 cut-off events. For 522647/522647 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 135742 event pairs, 3135 based on Foata normal form. 32/16167 useless extension candidates. Maximal degree in co-relation 172658. Up to 12393 conditions per place. [2022-12-13 14:30:30,169 INFO L137 encePairwiseOnDemand]: 383/389 looper letters, 1380 selfloop transitions, 643 changer transitions 2/2025 dead transitions. [2022-12-13 14:30:30,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 2025 transitions, 48395 flow [2022-12-13 14:30:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 14:30:30,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-13 14:30:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4526 transitions. [2022-12-13 14:30:30,176 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41553433712816745 [2022-12-13 14:30:30,176 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4526 transitions. [2022-12-13 14:30:30,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4526 transitions. [2022-12-13 14:30:30,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:30:30,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4526 transitions. [2022-12-13 14:30:30,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 161.64285714285714) internal successors, (4526), 28 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:30:30,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 389.0) internal successors, (11281), 29 states have internal predecessors, (11281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:30:30,209 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 389.0) internal successors, (11281), 29 states have internal predecessors, (11281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:30:30,209 INFO L175 Difference]: Start difference. First operand has 378 places, 1789 transitions, 39428 flow. Second operand 28 states and 4526 transitions. [2022-12-13 14:30:30,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 2025 transitions, 48395 flow [2022-12-13 14:30:35,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 2025 transitions, 47150 flow, removed 372 selfloop flow, removed 6 redundant places. [2022-12-13 14:30:35,230 INFO L231 Difference]: Finished difference. Result has 412 places, 1871 transitions, 42034 flow [2022-12-13 14:30:35,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=38174, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=42034, PETRI_PLACES=412, PETRI_TRANSITIONS=1871} [2022-12-13 14:30:35,231 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 391 predicate places. [2022-12-13 14:30:35,231 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1871 transitions, 42034 flow [2022-12-13 14:30:35,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 157.65) internal successors, (3153), 20 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:30:35,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:30:35,232 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:30:35,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 14:30:35,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:30:35,433 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:30:35,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:30:35,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1821347386, now seen corresponding path program 20 times [2022-12-13 14:30:35,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:30:35,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465562243] [2022-12-13 14:30:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:30:35,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:30:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:30:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:30:35,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:30:35,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465562243] [2022-12-13 14:30:35,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465562243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:30:35,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797909884] [2022-12-13 14:30:35,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:30:35,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:30:35,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:30:35,585 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:30:35,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 14:30:35,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:30:35,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:30:35,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 14:30:35,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:30:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:30:35,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:30:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:30:36,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797909884] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:30:36,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:30:36,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-13 14:30:36,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410643746] [2022-12-13 14:30:36,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:30:36,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 14:30:36,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:30:36,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 14:30:36,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-12-13 14:30:36,516 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 389 [2022-12-13 14:30:36,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1871 transitions, 42034 flow. Second operand has 17 states, 17 states have (on average 157.76470588235293) internal successors, (2682), 17 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:30:36,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:30:36,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 389 [2022-12-13 14:30:36,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:31:07,347 WARN L233 SmtUtils]: Spent 11.42s on a formula simplification. DAG size of input: 54 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:31:20,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:31:32,210 WARN L233 SmtUtils]: Spent 10.56s on a formula simplification. DAG size of input: 54 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:31:41,654 WARN L539 Checker$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 14:31:51,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:32:07,253 WARN L233 SmtUtils]: Spent 7.53s on a formula simplification. DAG size of input: 45 DAG size of output: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:32:18,352 WARN L539 Checker$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 14:32:22,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:32:24,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:32:26,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:32:36,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:33:00,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:33:10,952 INFO L130 PetriNetUnfolder]: 9052/16606 cut-off events. [2022-12-13 14:33:10,952 INFO L131 PetriNetUnfolder]: For 585203/585203 co-relation queries the response was YES. [2022-12-13 14:33:11,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185102 conditions, 16606 events. 9052/16606 cut-off events. For 585203/585203 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 141432 event pairs, 252 based on Foata normal form. 72/16678 useless extension candidates. Maximal degree in co-relation 183517. Up to 5842 conditions per place. [2022-12-13 14:33:11,205 INFO L137 encePairwiseOnDemand]: 383/389 looper letters, 1418 selfloop transitions, 1505 changer transitions 27/2950 dead transitions. [2022-12-13 14:33:11,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 2950 transitions, 67809 flow [2022-12-13 14:33:11,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 14:33:11,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-12-13 14:33:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 8882 transitions. [2022-12-13 14:33:11,221 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4151437251694321 [2022-12-13 14:33:11,221 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 8882 transitions. [2022-12-13 14:33:11,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 8882 transitions. [2022-12-13 14:33:11,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:33:11,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 8882 transitions. [2022-12-13 14:33:11,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 161.4909090909091) internal successors, (8882), 55 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:11,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 389.0) internal successors, (21784), 56 states have internal predecessors, (21784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:11,261 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 389.0) internal successors, (21784), 56 states have internal predecessors, (21784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:11,261 INFO L175 Difference]: Start difference. First operand has 412 places, 1871 transitions, 42034 flow. Second operand 55 states and 8882 transitions. [2022-12-13 14:33:11,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 2950 transitions, 67809 flow [2022-12-13 14:33:17,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 2950 transitions, 66630 flow, removed 421 selfloop flow, removed 8 redundant places. [2022-12-13 14:33:17,120 INFO L231 Difference]: Finished difference. Result has 468 places, 2133 transitions, 49819 flow [2022-12-13 14:33:17,121 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=389, PETRI_DIFFERENCE_MINUEND_FLOW=41006, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=49819, PETRI_PLACES=468, PETRI_TRANSITIONS=2133} [2022-12-13 14:33:17,121 INFO L288 CegarLoopForPetriNet]: 21 programPoint places, 447 predicate places. [2022-12-13 14:33:17,121 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 2133 transitions, 49819 flow [2022-12-13 14:33:17,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 157.76470588235293) internal successors, (2682), 17 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:17,121 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 14:33:17,122 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:33:17,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 14:33:17,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 14:33:17,323 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 14:33:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:33:17,323 INFO L85 PathProgramCache]: Analyzing trace with hash 606635550, now seen corresponding path program 21 times [2022-12-13 14:33:17,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:33:17,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044879939] [2022-12-13 14:33:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:33:17,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:33:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:33:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:33:17,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:33:17,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044879939] [2022-12-13 14:33:17,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044879939] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:33:17,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886834025] [2022-12-13 14:33:17,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 14:33:17,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:33:17,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:33:17,467 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:33:17,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d504bfe-1c0b-4ab0-886c-adb24ec4a123/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 14:33:17,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 14:33:17,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:33:17,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 14:33:17,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:33:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:33:17,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:33:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 14:33:18,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886834025] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:33:18,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:33:18,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-13 14:33:18,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595992939] [2022-12-13 14:33:18,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:33:18,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 14:33:18,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:33:18,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 14:33:18,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-12-13 14:33:19,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 389 [2022-12-13 14:33:19,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 2133 transitions, 49819 flow. Second operand has 17 states, 17 states have (on average 157.88235294117646) internal successors, (2684), 17 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:33:19,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 14:33:19,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 389 [2022-12-13 14:33:19,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 14:33:44,088 WARN L233 SmtUtils]: Spent 14.66s on a formula simplification. DAG size of input: 54 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:33:56,038 WARN L233 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 47 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:34:08,055 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 14:34:10,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-13 14:34:19,114 WARN L233 SmtUtils]: Spent 8.54s on a formula simplification. DAG size of input: 53 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)