./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN --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 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 --- 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-6b4ec56 [2022-11-20 12:45:03,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:45:03,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:45:03,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:45:03,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:45:03,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:45:03,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:45:03,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:45:03,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:45:03,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:45:03,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:45:03,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:45:03,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:45:03,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:45:03,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:45:03,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:45:03,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:45:03,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:45:03,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:45:03,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:45:03,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:45:03,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:45:03,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:45:03,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:45:03,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:45:03,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:45:03,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:45:03,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:45:03,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:45:03,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:45:03,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:45:03,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:45:03,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:45:03,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:45:03,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:45:03,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:45:03,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:45:03,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:45:03,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:45:03,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:45:03,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:45:03,296 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:45:03,330 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:45:03,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:45:03,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:45:03,331 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:45:03,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:45:03,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:45:03,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:45:03,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:45:03,333 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:45:03,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:45:03,334 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:45:03,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:45:03,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:45:03,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:45:03,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:45:03,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:45:03,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:45:03,336 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:45:03,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:45:03,336 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:45:03,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:45:03,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:45:03,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:45:03,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:45:03,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:45:03,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:45:03,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:45:03,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:45:03,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:45:03,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:45:03,339 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:45:03,339 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:45:03,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:45:03,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 844ba080c7d33529db727776ee230d62edb7b62a6350a8061572438c458d73d3 [2022-11-20 12:45:03,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:45:03,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:45:03,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:45:03,673 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:45:03,673 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:45:03,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i [2022-11-20 12:45:06,663 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:45:06,910 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:45:06,911 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i [2022-11-20 12:45:06,932 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/data/aa2c7b39f/fd2876fe71d844b99cb0f770d0786c9f/FLAGfa2c1a0e6 [2022-11-20 12:45:06,947 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/data/aa2c7b39f/fd2876fe71d844b99cb0f770d0786c9f [2022-11-20 12:45:06,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:45:06,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:45:06,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:45:06,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:45:06,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:45:06,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:45:06" (1/1) ... [2022-11-20 12:45:06,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a9e415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:06, skipping insertion in model container [2022-11-20 12:45:06,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:45:06" (1/1) ... [2022-11-20 12:45:06,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:45:07,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:45:07,318 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_b5ce2b85-35d7-47cf-984d-d28d13104c07/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2022-11-20 12:45:07,344 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:45:07,358 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:45:07,388 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_b5ce2b85-35d7-47cf-984d-d28d13104c07/sv-benchmarks/c/goblint-regression/28-race_reach_42-trylock2_racefree.i[30176,30189] [2022-11-20 12:45:07,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:45:07,436 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:45:07,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:07 WrapperNode [2022-11-20 12:45:07,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:45:07,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:45:07,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:45:07,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:45:07,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:07" (1/1) ... [2022-11-20 12:45:07,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:07" (1/1) ... [2022-11-20 12:45:07,493 INFO L138 Inliner]: procedures = 171, calls = 47, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 130 [2022-11-20 12:45:07,493 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:45:07,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:45:07,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:45:07,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:45:07,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:07" (1/1) ... [2022-11-20 12:45:07,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:07" (1/1) ... [2022-11-20 12:45:07,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:07" (1/1) ... [2022-11-20 12:45:07,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:07" (1/1) ... [2022-11-20 12:45:07,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:07" (1/1) ... [2022-11-20 12:45:07,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:07" (1/1) ... [2022-11-20 12:45:07,521 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:07" (1/1) ... [2022-11-20 12:45:07,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:07" (1/1) ... [2022-11-20 12:45:07,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:45:07,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:45:07,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:45:07,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:45:07,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:07" (1/1) ... [2022-11-20 12:45:07,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:45:07,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:45:07,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:45:07,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:45:07,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:45:07,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:45:07,608 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 12:45:07,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:45:07,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:45:07,609 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 12:45:07,610 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 12:45:07,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:45:07,612 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2022-11-20 12:45:07,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:45:07,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:45:07,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:45:07,614 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 12:45:07,826 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:45:07,828 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:45:08,195 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:45:08,205 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:45:08,218 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-11-20 12:45:08,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:45:08 BoogieIcfgContainer [2022-11-20 12:45:08,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:45:08,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:45:08,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:45:08,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:45:08,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:45:06" (1/3) ... [2022-11-20 12:45:08,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666b78db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:45:08, skipping insertion in model container [2022-11-20 12:45:08,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:07" (2/3) ... [2022-11-20 12:45:08,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@666b78db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:45:08, skipping insertion in model container [2022-11-20 12:45:08,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:45:08" (3/3) ... [2022-11-20 12:45:08,231 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_42-trylock2_racefree.i [2022-11-20 12:45:08,250 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 12:45:08,262 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:45:08,262 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-20 12:45:08,262 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:45:08,364 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 12:45:08,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 196 transitions, 400 flow [2022-11-20 12:45:08,529 INFO L130 PetriNetUnfolder]: 45/290 cut-off events. [2022-11-20 12:45:08,530 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 12:45:08,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 290 events. 45/290 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1128 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 152. Up to 6 conditions per place. [2022-11-20 12:45:08,540 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 196 transitions, 400 flow [2022-11-20 12:45:08,546 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 191 transitions, 387 flow [2022-11-20 12:45:08,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:45:08,579 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;@7e252aa6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:45:08,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 12:45:08,626 INFO L130 PetriNetUnfolder]: 6/103 cut-off events. [2022-11-20 12:45:08,630 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:45:08,631 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:08,631 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:08,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:08,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:08,638 INFO L85 PathProgramCache]: Analyzing trace with hash 904733028, now seen corresponding path program 1 times [2022-11-20 12:45:08,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:08,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324362422] [2022-11-20 12:45:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:08,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:08,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:08,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:08,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324362422] [2022-11-20 12:45:08,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324362422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:08,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:08,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:45:08,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607461378] [2022-11-20 12:45:08,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:08,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:45:08,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:08,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:45:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:45:08,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 196 [2022-11-20 12:45:08,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 191 transitions, 387 flow. Second operand has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:08,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:45:08,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 196 [2022-11-20 12:45:08,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:45:09,025 INFO L130 PetriNetUnfolder]: 2/235 cut-off events. [2022-11-20 12:45:09,025 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 12:45:09,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 235 events. 2/235 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 456 event pairs, 0 based on Foata normal form. 42/263 useless extension candidates. Maximal degree in co-relation 123. Up to 4 conditions per place. [2022-11-20 12:45:09,028 INFO L137 encePairwiseOnDemand]: 169/196 looper letters, 1 selfloop transitions, 0 changer transitions 15/160 dead transitions. [2022-11-20 12:45:09,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 160 transitions, 327 flow [2022-11-20 12:45:09,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:45:09,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:45:09,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 354 transitions. [2022-11-20 12:45:09,043 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9030612244897959 [2022-11-20 12:45:09,044 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 354 transitions. [2022-11-20 12:45:09,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 354 transitions. [2022-11-20 12:45:09,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:45:09,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 354 transitions. [2022-11-20 12:45:09,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 177.0) internal successors, (354), 2 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,065 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,067 INFO L175 Difference]: Start difference. First operand has 166 places, 191 transitions, 387 flow. Second operand 2 states and 354 transitions. [2022-11-20 12:45:09,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 160 transitions, 327 flow [2022-11-20 12:45:09,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 160 transitions, 327 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:45:09,075 INFO L231 Difference]: Finished difference. Result has 163 places, 145 transitions, 295 flow [2022-11-20 12:45:09,078 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=295, PETRI_PLACES=163, PETRI_TRANSITIONS=145} [2022-11-20 12:45:09,081 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, -3 predicate places. [2022-11-20 12:45:09,082 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 145 transitions, 295 flow [2022-11-20 12:45:09,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,083 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:09,083 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:09,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:45:09,083 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:09,084 INFO L85 PathProgramCache]: Analyzing trace with hash -892218331, now seen corresponding path program 1 times [2022-11-20 12:45:09,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:09,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335873425] [2022-11-20 12:45:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:09,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:09,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:09,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335873425] [2022-11-20 12:45:09,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335873425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:09,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:09,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:45:09,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542420777] [2022-11-20 12:45:09,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:09,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:45:09,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:09,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:45:09,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:45:09,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 196 [2022-11-20 12:45:09,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 145 transitions, 295 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:45:09,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 196 [2022-11-20 12:45:09,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:45:09,307 INFO L130 PetriNetUnfolder]: 1/149 cut-off events. [2022-11-20 12:45:09,307 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:45:09,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 149 events. 1/149 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 137 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 162. Up to 6 conditions per place. [2022-11-20 12:45:09,309 INFO L137 encePairwiseOnDemand]: 193/196 looper letters, 8 selfloop transitions, 2 changer transitions 0/147 dead transitions. [2022-11-20 12:45:09,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 147 transitions, 319 flow [2022-11-20 12:45:09,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:45:09,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:45:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2022-11-20 12:45:09,313 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.814625850340136 [2022-11-20 12:45:09,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2022-11-20 12:45:09,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2022-11-20 12:45:09,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:45:09,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2022-11-20 12:45:09,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,319 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,319 INFO L175 Difference]: Start difference. First operand has 163 places, 145 transitions, 295 flow. Second operand 3 states and 479 transitions. [2022-11-20 12:45:09,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 147 transitions, 319 flow [2022-11-20 12:45:09,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 147 transitions, 319 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:45:09,324 INFO L231 Difference]: Finished difference. Result has 151 places, 145 transitions, 303 flow [2022-11-20 12:45:09,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=303, PETRI_PLACES=151, PETRI_TRANSITIONS=145} [2022-11-20 12:45:09,325 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, -15 predicate places. [2022-11-20 12:45:09,325 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 145 transitions, 303 flow [2022-11-20 12:45:09,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:09,326 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:09,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:45:09,327 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:09,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:09,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1885180906, now seen corresponding path program 1 times [2022-11-20 12:45:09,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:09,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111330857] [2022-11-20 12:45:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:09,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:45:09,379 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:45:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:45:09,455 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:45:09,455 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:45:09,457 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-20 12:45:09,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-20 12:45:09,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-20 12:45:09,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-20 12:45:09,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-20 12:45:09,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:45:09,462 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 12:45:09,469 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:45:09,469 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 12:45:09,509 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 12:45:09,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 251 transitions, 520 flow [2022-11-20 12:45:09,601 INFO L130 PetriNetUnfolder]: 76/464 cut-off events. [2022-11-20 12:45:09,601 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 12:45:09,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 464 events. 76/464 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2047 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 292. Up to 9 conditions per place. [2022-11-20 12:45:09,606 INFO L82 GeneralOperation]: Start removeDead. Operand has 214 places, 251 transitions, 520 flow [2022-11-20 12:45:09,612 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 251 transitions, 520 flow [2022-11-20 12:45:09,614 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:45:09,615 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;@7e252aa6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:45:09,616 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 12:45:09,647 INFO L130 PetriNetUnfolder]: 6/102 cut-off events. [2022-11-20 12:45:09,647 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:45:09,647 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:09,648 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:09,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:09,649 INFO L85 PathProgramCache]: Analyzing trace with hash -591842716, now seen corresponding path program 1 times [2022-11-20 12:45:09,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:09,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554468077] [2022-11-20 12:45:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:09,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:09,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:09,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554468077] [2022-11-20 12:45:09,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554468077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:09,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:09,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:45:09,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366894657] [2022-11-20 12:45:09,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:09,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:45:09,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:09,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:45:09,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:45:09,693 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 251 [2022-11-20 12:45:09,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 251 transitions, 520 flow. Second operand has 2 states, 2 states have (on average 204.5) internal successors, (409), 2 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:45:09,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 251 [2022-11-20 12:45:09,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:45:09,777 INFO L130 PetriNetUnfolder]: 6/382 cut-off events. [2022-11-20 12:45:09,777 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 12:45:09,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 382 events. 6/382 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1195 event pairs, 0 based on Foata normal form. 96/456 useless extension candidates. Maximal degree in co-relation 244. Up to 7 conditions per place. [2022-11-20 12:45:09,780 INFO L137 encePairwiseOnDemand]: 212/251 looper letters, 2 selfloop transitions, 0 changer transitions 21/208 dead transitions. [2022-11-20 12:45:09,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 208 transitions, 442 flow [2022-11-20 12:45:09,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:45:09,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:45:09,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 451 transitions. [2022-11-20 12:45:09,783 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.898406374501992 [2022-11-20 12:45:09,783 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 451 transitions. [2022-11-20 12:45:09,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 451 transitions. [2022-11-20 12:45:09,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:45:09,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 451 transitions. [2022-11-20 12:45:09,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 225.5) internal successors, (451), 2 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,788 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,788 INFO L175 Difference]: Start difference. First operand has 214 places, 251 transitions, 520 flow. Second operand 2 states and 451 transitions. [2022-11-20 12:45:09,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 208 transitions, 442 flow [2022-11-20 12:45:09,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 208 transitions, 442 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:45:09,794 INFO L231 Difference]: Finished difference. Result has 211 places, 187 transitions, 386 flow [2022-11-20 12:45:09,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=386, PETRI_PLACES=211, PETRI_TRANSITIONS=187} [2022-11-20 12:45:09,795 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, -3 predicate places. [2022-11-20 12:45:09,796 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 187 transitions, 386 flow [2022-11-20 12:45:09,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 204.5) internal successors, (409), 2 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:09,797 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:09,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:45:09,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:09,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:09,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1906173221, now seen corresponding path program 1 times [2022-11-20 12:45:09,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:09,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412222963] [2022-11-20 12:45:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:09,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:09,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:09,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:09,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412222963] [2022-11-20 12:45:09,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412222963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:09,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:09,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:45:09,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660039711] [2022-11-20 12:45:09,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:09,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:45:09,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:09,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:45:09,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:45:09,866 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 251 [2022-11-20 12:45:09,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 187 transitions, 386 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:45:09,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 251 [2022-11-20 12:45:09,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:45:09,946 INFO L130 PetriNetUnfolder]: 2/256 cut-off events. [2022-11-20 12:45:09,946 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:45:09,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 256 events. 2/256 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 631 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 279. Up to 12 conditions per place. [2022-11-20 12:45:09,949 INFO L137 encePairwiseOnDemand]: 248/251 looper letters, 11 selfloop transitions, 2 changer transitions 0/191 dead transitions. [2022-11-20 12:45:09,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 191 transitions, 420 flow [2022-11-20 12:45:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:45:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:45:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2022-11-20 12:45:09,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8034528552456839 [2022-11-20 12:45:09,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2022-11-20 12:45:09,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2022-11-20 12:45:09,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:45:09,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2022-11-20 12:45:09,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,957 INFO L175 Difference]: Start difference. First operand has 211 places, 187 transitions, 386 flow. Second operand 3 states and 605 transitions. [2022-11-20 12:45:09,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 191 transitions, 420 flow [2022-11-20 12:45:09,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 191 transitions, 418 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-20 12:45:09,962 INFO L231 Difference]: Finished difference. Result has 195 places, 188 transitions, 396 flow [2022-11-20 12:45:09,963 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=396, PETRI_PLACES=195, PETRI_TRANSITIONS=188} [2022-11-20 12:45:09,963 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, -19 predicate places. [2022-11-20 12:45:09,964 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 188 transitions, 396 flow [2022-11-20 12:45:09,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:09,965 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:09,965 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:09,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:45:09,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:09,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:09,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1025915671, now seen corresponding path program 1 times [2022-11-20 12:45:09,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:09,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649090610] [2022-11-20 12:45:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:09,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:10,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:10,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649090610] [2022-11-20 12:45:10,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649090610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:45:10,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813199249] [2022-11-20 12:45:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:10,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:10,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:45:10,111 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:45:10,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:45:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:10,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:45:10,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:45:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:10,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:45:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:10,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813199249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:45:10,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:45:10,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:45:10,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799388772] [2022-11-20 12:45:10,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:45:10,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:45:10,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:10,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:45:10,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:45:10,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 251 [2022-11-20 12:45:10,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 188 transitions, 396 flow. Second operand has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:10,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:45:10,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 251 [2022-11-20 12:45:10,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:45:10,596 INFO L130 PetriNetUnfolder]: 0/144 cut-off events. [2022-11-20 12:45:10,596 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 12:45:10,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 144 events. 0/144 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 121 event pairs, 0 based on Foata normal form. 2/146 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-20 12:45:10,597 INFO L137 encePairwiseOnDemand]: 246/251 looper letters, 9 selfloop transitions, 7 changer transitions 0/138 dead transitions. [2022-11-20 12:45:10,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 138 transitions, 326 flow [2022-11-20 12:45:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:45:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:45:10,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1782 transitions. [2022-11-20 12:45:10,602 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7888446215139442 [2022-11-20 12:45:10,602 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1782 transitions. [2022-11-20 12:45:10,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1782 transitions. [2022-11-20 12:45:10,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:45:10,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1782 transitions. [2022-11-20 12:45:10,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 198.0) internal successors, (1782), 9 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:10,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:10,617 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 251.0) internal successors, (2510), 10 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:10,617 INFO L175 Difference]: Start difference. First operand has 195 places, 188 transitions, 396 flow. Second operand 9 states and 1782 transitions. [2022-11-20 12:45:10,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 138 transitions, 326 flow [2022-11-20 12:45:10,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 138 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:45:10,622 INFO L231 Difference]: Finished difference. Result has 147 places, 134 transitions, 298 flow [2022-11-20 12:45:10,622 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=251, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=298, PETRI_PLACES=147, PETRI_TRANSITIONS=134} [2022-11-20 12:45:10,626 INFO L288 CegarLoopForPetriNet]: 214 programPoint places, -67 predicate places. [2022-11-20 12:45:10,626 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 134 transitions, 298 flow [2022-11-20 12:45:10,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 198.3) internal successors, (1983), 10 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:10,628 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:10,629 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:10,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 12:45:10,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:10,835 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:10,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:10,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1234493863, now seen corresponding path program 1 times [2022-11-20 12:45:10,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:10,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144847953] [2022-11-20 12:45:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:10,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:45:10,876 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:45:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:45:10,914 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:45:10,915 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:45:10,915 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-20 12:45:10,915 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-20 12:45:10,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-20 12:45:10,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-20 12:45:10,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-20 12:45:10,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:45:10,917 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 12:45:10,918 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:45:10,918 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 12:45:10,976 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 12:45:10,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 306 transitions, 642 flow [2022-11-20 12:45:11,116 INFO L130 PetriNetUnfolder]: 112/671 cut-off events. [2022-11-20 12:45:11,117 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-20 12:45:11,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 699 conditions, 671 events. 112/671 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3133 event pairs, 1 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 472. Up to 16 conditions per place. [2022-11-20 12:45:11,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 306 transitions, 642 flow [2022-11-20 12:45:11,139 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 258 places, 306 transitions, 642 flow [2022-11-20 12:45:11,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:45:11,147 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;@7e252aa6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:45:11,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 12:45:11,159 INFO L130 PetriNetUnfolder]: 6/102 cut-off events. [2022-11-20 12:45:11,160 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:45:11,160 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:11,160 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:11,163 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:11,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:11,164 INFO L85 PathProgramCache]: Analyzing trace with hash -670988188, now seen corresponding path program 1 times [2022-11-20 12:45:11,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:11,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261258491] [2022-11-20 12:45:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:11,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:11,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:11,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261258491] [2022-11-20 12:45:11,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261258491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:11,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:11,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:45:11,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566210157] [2022-11-20 12:45:11,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:11,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:45:11,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:11,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:45:11,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:45:11,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 306 [2022-11-20 12:45:11,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 306 transitions, 642 flow. Second operand has 2 states, 2 states have (on average 245.5) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:11,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:45:11,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 306 [2022-11-20 12:45:11,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:45:11,392 INFO L130 PetriNetUnfolder]: 12/555 cut-off events. [2022-11-20 12:45:11,392 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-20 12:45:11,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 555 events. 12/555 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2140 event pairs, 1 based on Foata normal form. 218/741 useless extension candidates. Maximal degree in co-relation 396. Up to 16 conditions per place. [2022-11-20 12:45:11,396 INFO L137 encePairwiseOnDemand]: 255/306 looper letters, 3 selfloop transitions, 0 changer transitions 22/251 dead transitions. [2022-11-20 12:45:11,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 251 transitions, 544 flow [2022-11-20 12:45:11,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:45:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:45:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 547 transitions. [2022-11-20 12:45:11,399 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8937908496732027 [2022-11-20 12:45:11,399 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 547 transitions. [2022-11-20 12:45:11,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 547 transitions. [2022-11-20 12:45:11,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:45:11,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 547 transitions. [2022-11-20 12:45:11,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 273.5) internal successors, (547), 2 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:11,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:11,404 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 306.0) internal successors, (918), 3 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:11,405 INFO L175 Difference]: Start difference. First operand has 258 places, 306 transitions, 642 flow. Second operand 2 states and 547 transitions. [2022-11-20 12:45:11,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 251 transitions, 544 flow [2022-11-20 12:45:11,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 251 transitions, 544 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:45:11,411 INFO L231 Difference]: Finished difference. Result has 255 places, 229 transitions, 479 flow [2022-11-20 12:45:11,412 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=479, PETRI_PLACES=255, PETRI_TRANSITIONS=229} [2022-11-20 12:45:11,412 INFO L288 CegarLoopForPetriNet]: 258 programPoint places, -3 predicate places. [2022-11-20 12:45:11,413 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 229 transitions, 479 flow [2022-11-20 12:45:11,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 245.5) internal successors, (491), 2 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:11,413 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:11,414 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:11,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 12:45:11,414 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:11,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:11,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1827027749, now seen corresponding path program 1 times [2022-11-20 12:45:11,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:11,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972171758] [2022-11-20 12:45:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:11,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:11,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:11,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972171758] [2022-11-20 12:45:11,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972171758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:11,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:11,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:45:11,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827858837] [2022-11-20 12:45:11,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:11,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:45:11,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:11,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:45:11,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:45:11,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 306 [2022-11-20 12:45:11,483 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 229 transitions, 479 flow. Second operand has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:11,483 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:45:11,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 306 [2022-11-20 12:45:11,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:45:11,597 INFO L130 PetriNetUnfolder]: 3/363 cut-off events. [2022-11-20 12:45:11,597 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 12:45:11,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 363 events. 3/363 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1216 event pairs, 0 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 397. Up to 18 conditions per place. [2022-11-20 12:45:11,601 INFO L137 encePairwiseOnDemand]: 303/306 looper letters, 12 selfloop transitions, 2 changer transitions 0/233 dead transitions. [2022-11-20 12:45:11,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 233 transitions, 515 flow [2022-11-20 12:45:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:45:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:45:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2022-11-20 12:45:11,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7941176470588235 [2022-11-20 12:45:11,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2022-11-20 12:45:11,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2022-11-20 12:45:11,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:45:11,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2022-11-20 12:45:11,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:11,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:11,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 306.0) internal successors, (1224), 4 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:11,609 INFO L175 Difference]: Start difference. First operand has 255 places, 229 transitions, 479 flow. Second operand 3 states and 729 transitions. [2022-11-20 12:45:11,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 233 transitions, 515 flow [2022-11-20 12:45:11,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 233 transitions, 509 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-20 12:45:11,614 INFO L231 Difference]: Finished difference. Result has 239 places, 230 transitions, 485 flow [2022-11-20 12:45:11,615 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=485, PETRI_PLACES=239, PETRI_TRANSITIONS=230} [2022-11-20 12:45:11,617 INFO L288 CegarLoopForPetriNet]: 258 programPoint places, -19 predicate places. [2022-11-20 12:45:11,617 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 230 transitions, 485 flow [2022-11-20 12:45:11,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:11,618 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:11,618 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:11,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 12:45:11,618 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:11,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2032357282, now seen corresponding path program 1 times [2022-11-20 12:45:11,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:11,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416756108] [2022-11-20 12:45:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:11,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:11,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:11,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416756108] [2022-11-20 12:45:11,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416756108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:45:11,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896996874] [2022-11-20 12:45:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:11,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:11,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:45:11,749 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:45:11,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:45:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:11,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:45:11,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:45:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:11,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:45:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:11,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896996874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:45:11,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:45:11,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:45:11,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432401318] [2022-11-20 12:45:11,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:45:11,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:45:11,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:11,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:45:11,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:45:11,979 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 306 [2022-11-20 12:45:11,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 230 transitions, 485 flow. Second operand has 10 states, 10 states have (on average 239.3) internal successors, (2393), 10 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:11,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:45:11,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 306 [2022-11-20 12:45:11,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:45:12,122 INFO L130 PetriNetUnfolder]: 1/251 cut-off events. [2022-11-20 12:45:12,123 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 12:45:12,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 251 events. 1/251 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 501 event pairs, 0 based on Foata normal form. 2/249 useless extension candidates. Maximal degree in co-relation 289. Up to 7 conditions per place. [2022-11-20 12:45:12,125 INFO L137 encePairwiseOnDemand]: 300/306 looper letters, 13 selfloop transitions, 9 changer transitions 0/240 dead transitions. [2022-11-20 12:45:12,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 240 transitions, 551 flow [2022-11-20 12:45:12,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:45:12,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:45:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2157 transitions. [2022-11-20 12:45:12,131 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7832244008714597 [2022-11-20 12:45:12,131 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2157 transitions. [2022-11-20 12:45:12,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2157 transitions. [2022-11-20 12:45:12,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:45:12,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2157 transitions. [2022-11-20 12:45:12,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 239.66666666666666) internal successors, (2157), 9 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:12,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:12,145 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:12,145 INFO L175 Difference]: Start difference. First operand has 239 places, 230 transitions, 485 flow. Second operand 9 states and 2157 transitions. [2022-11-20 12:45:12,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 240 transitions, 551 flow [2022-11-20 12:45:12,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 240 transitions, 549 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:45:12,151 INFO L231 Difference]: Finished difference. Result has 249 places, 236 transitions, 533 flow [2022-11-20 12:45:12,151 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=533, PETRI_PLACES=249, PETRI_TRANSITIONS=236} [2022-11-20 12:45:12,153 INFO L288 CegarLoopForPetriNet]: 258 programPoint places, -9 predicate places. [2022-11-20 12:45:12,153 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 236 transitions, 533 flow [2022-11-20 12:45:12,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 239.3) internal successors, (2393), 10 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:12,155 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:12,155 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:12,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:45:12,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 12:45:12,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:12,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:12,361 INFO L85 PathProgramCache]: Analyzing trace with hash -776467533, now seen corresponding path program 1 times [2022-11-20 12:45:12,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:12,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974826120] [2022-11-20 12:45:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:12,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:45:12,398 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:45:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:45:12,460 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:45:12,460 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:45:12,460 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-20 12:45:12,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-20 12:45:12,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-20 12:45:12,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-20 12:45:12,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-20 12:45:12,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 12:45:12,461 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 12:45:12,461 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:45:12,461 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 12:45:12,511 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 12:45:12,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 361 transitions, 766 flow [2022-11-20 12:45:12,705 INFO L130 PetriNetUnfolder]: 160/946 cut-off events. [2022-11-20 12:45:12,705 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-20 12:45:12,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1001 conditions, 946 events. 160/946 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4651 event pairs, 6 based on Foata normal form. 0/766 useless extension candidates. Maximal degree in co-relation 691. Up to 32 conditions per place. [2022-11-20 12:45:12,719 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 361 transitions, 766 flow [2022-11-20 12:45:12,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 302 places, 361 transitions, 766 flow [2022-11-20 12:45:12,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:45:12,739 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;@7e252aa6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:45:12,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 12:45:12,748 INFO L130 PetriNetUnfolder]: 6/102 cut-off events. [2022-11-20 12:45:12,749 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:45:12,749 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:12,749 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:12,749 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:12,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:12,750 INFO L85 PathProgramCache]: Analyzing trace with hash 667296612, now seen corresponding path program 1 times [2022-11-20 12:45:12,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:12,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728734138] [2022-11-20 12:45:12,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:12,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:12,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:12,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728734138] [2022-11-20 12:45:12,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728734138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:12,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:12,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:45:12,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785374642] [2022-11-20 12:45:12,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:12,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:45:12,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:12,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:45:12,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:45:12,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 361 [2022-11-20 12:45:12,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 361 transitions, 766 flow. Second operand has 2 states, 2 states have (on average 286.5) internal successors, (573), 2 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:12,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:45:12,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 361 [2022-11-20 12:45:12,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:45:13,039 INFO L130 PetriNetUnfolder]: 26/792 cut-off events. [2022-11-20 12:45:13,039 INFO L131 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-11-20 12:45:13,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 792 events. 26/792 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3586 event pairs, 6 based on Foata normal form. 497/1243 useless extension candidates. Maximal degree in co-relation 590. Up to 37 conditions per place. [2022-11-20 12:45:13,046 INFO L137 encePairwiseOnDemand]: 298/361 looper letters, 4 selfloop transitions, 0 changer transitions 23/294 dead transitions. [2022-11-20 12:45:13,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 294 transitions, 648 flow [2022-11-20 12:45:13,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:45:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:45:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 643 transitions. [2022-11-20 12:45:13,048 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8905817174515236 [2022-11-20 12:45:13,048 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 643 transitions. [2022-11-20 12:45:13,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 643 transitions. [2022-11-20 12:45:13,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:45:13,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 643 transitions. [2022-11-20 12:45:13,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 321.5) internal successors, (643), 2 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:13,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 361.0) internal successors, (1083), 3 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:13,053 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 361.0) internal successors, (1083), 3 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:13,053 INFO L175 Difference]: Start difference. First operand has 302 places, 361 transitions, 766 flow. Second operand 2 states and 643 transitions. [2022-11-20 12:45:13,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 294 transitions, 648 flow [2022-11-20 12:45:13,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 294 transitions, 648 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:45:13,059 INFO L231 Difference]: Finished difference. Result has 299 places, 271 transitions, 574 flow [2022-11-20 12:45:13,060 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=574, PETRI_PLACES=299, PETRI_TRANSITIONS=271} [2022-11-20 12:45:13,061 INFO L288 CegarLoopForPetriNet]: 302 programPoint places, -3 predicate places. [2022-11-20 12:45:13,061 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 271 transitions, 574 flow [2022-11-20 12:45:13,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 286.5) internal successors, (573), 2 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:13,061 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:13,062 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:13,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 12:45:13,062 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:13,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:13,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1129654747, now seen corresponding path program 1 times [2022-11-20 12:45:13,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:13,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770023863] [2022-11-20 12:45:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:13,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:13,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:13,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770023863] [2022-11-20 12:45:13,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770023863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:13,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:13,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:45:13,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852164064] [2022-11-20 12:45:13,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:13,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:45:13,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:13,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:45:13,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:45:13,103 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 361 [2022-11-20 12:45:13,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 271 transitions, 574 flow. Second operand has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:13,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:45:13,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 361 [2022-11-20 12:45:13,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:45:13,238 INFO L130 PetriNetUnfolder]: 4/470 cut-off events. [2022-11-20 12:45:13,239 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 12:45:13,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523 conditions, 470 events. 4/470 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1832 event pairs, 0 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 516. Up to 24 conditions per place. [2022-11-20 12:45:13,244 INFO L137 encePairwiseOnDemand]: 358/361 looper letters, 13 selfloop transitions, 2 changer transitions 0/275 dead transitions. [2022-11-20 12:45:13,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 275 transitions, 612 flow [2022-11-20 12:45:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:45:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:45:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 853 transitions. [2022-11-20 12:45:13,247 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7876269621421976 [2022-11-20 12:45:13,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 853 transitions. [2022-11-20 12:45:13,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 853 transitions. [2022-11-20 12:45:13,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:45:13,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 853 transitions. [2022-11-20 12:45:13,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:13,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:13,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:13,254 INFO L175 Difference]: Start difference. First operand has 299 places, 271 transitions, 574 flow. Second operand 3 states and 853 transitions. [2022-11-20 12:45:13,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 275 transitions, 612 flow [2022-11-20 12:45:13,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 275 transitions, 600 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-20 12:45:13,260 INFO L231 Difference]: Finished difference. Result has 283 places, 272 transitions, 574 flow [2022-11-20 12:45:13,262 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=574, PETRI_PLACES=283, PETRI_TRANSITIONS=272} [2022-11-20 12:45:13,263 INFO L288 CegarLoopForPetriNet]: 302 programPoint places, -19 predicate places. [2022-11-20 12:45:13,263 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 272 transitions, 574 flow [2022-11-20 12:45:13,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:13,264 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:13,264 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:13,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 12:45:13,264 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:13,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1054315315, now seen corresponding path program 1 times [2022-11-20 12:45:13,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:13,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313328147] [2022-11-20 12:45:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:13,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:13,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:13,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313328147] [2022-11-20 12:45:13,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313328147] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:45:13,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749929975] [2022-11-20 12:45:13,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:13,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:13,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:45:13,366 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:45:13,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:45:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:13,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:45:13,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:45:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:13,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:45:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:13,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749929975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:45:13,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:45:13,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:45:13,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34800532] [2022-11-20 12:45:13,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:45:13,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:45:13,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:13,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:45:13,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:45:13,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 361 [2022-11-20 12:45:13,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 272 transitions, 574 flow. Second operand has 10 states, 10 states have (on average 280.3) internal successors, (2803), 10 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:13,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:45:13,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 361 [2022-11-20 12:45:13,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:45:13,773 INFO L130 PetriNetUnfolder]: 2/358 cut-off events. [2022-11-20 12:45:13,773 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 12:45:13,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 417 conditions, 358 events. 2/358 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1066 event pairs, 0 based on Foata normal form. 2/352 useless extension candidates. Maximal degree in co-relation 408. Up to 11 conditions per place. [2022-11-20 12:45:13,777 INFO L137 encePairwiseOnDemand]: 355/361 looper letters, 14 selfloop transitions, 9 changer transitions 0/282 dead transitions. [2022-11-20 12:45:13,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 282 transitions, 642 flow [2022-11-20 12:45:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:45:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:45:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2527 transitions. [2022-11-20 12:45:13,784 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2022-11-20 12:45:13,784 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2527 transitions. [2022-11-20 12:45:13,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2527 transitions. [2022-11-20 12:45:13,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:45:13,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2527 transitions. [2022-11-20 12:45:13,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 280.77777777777777) internal successors, (2527), 9 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) [2022-11-20 12:45:13,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:13,802 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:13,802 INFO L175 Difference]: Start difference. First operand has 283 places, 272 transitions, 574 flow. Second operand 9 states and 2527 transitions. [2022-11-20 12:45:13,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 282 transitions, 642 flow [2022-11-20 12:45:13,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 282 transitions, 640 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:45:13,808 INFO L231 Difference]: Finished difference. Result has 293 places, 278 transitions, 622 flow [2022-11-20 12:45:13,809 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=622, PETRI_PLACES=293, PETRI_TRANSITIONS=278} [2022-11-20 12:45:13,810 INFO L288 CegarLoopForPetriNet]: 302 programPoint places, -9 predicate places. [2022-11-20 12:45:13,810 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 278 transitions, 622 flow [2022-11-20 12:45:13,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 280.3) internal successors, (2803), 10 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:13,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:13,828 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:13,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:45:14,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 12:45:14,034 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:14,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:14,034 INFO L85 PathProgramCache]: Analyzing trace with hash 585911698, now seen corresponding path program 1 times [2022-11-20 12:45:14,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:14,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627573414] [2022-11-20 12:45:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:14,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 12:45:14,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:14,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627573414] [2022-11-20 12:45:14,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627573414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:14,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:14,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:45:14,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177255290] [2022-11-20 12:45:14,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:14,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:45:14,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:14,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:45:14,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:45:14,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 361 [2022-11-20 12:45:14,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 278 transitions, 622 flow. Second operand has 5 states, 5 states have (on average 250.6) internal successors, (1253), 5 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:14,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:45:14,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 361 [2022-11-20 12:45:14,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:45:55,409 INFO L130 PetriNetUnfolder]: 69512/231194 cut-off events. [2022-11-20 12:45:55,410 INFO L131 PetriNetUnfolder]: For 475/475 co-relation queries the response was YES. [2022-11-20 12:45:56,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323415 conditions, 231194 events. 69512/231194 cut-off events. For 475/475 co-relation queries the response was YES. Maximal size of possible extension queue 5529. Compared 3765407 event pairs, 24598 based on Foata normal form. 750/226608 useless extension candidates. Maximal degree in co-relation 323404. Up to 40763 conditions per place. [2022-11-20 12:45:58,162 INFO L137 encePairwiseOnDemand]: 340/361 looper letters, 109 selfloop transitions, 35 changer transitions 5/387 dead transitions. [2022-11-20 12:45:58,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 387 transitions, 1153 flow [2022-11-20 12:45:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:45:58,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:45:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2396 transitions. [2022-11-20 12:45:58,168 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7374576792859341 [2022-11-20 12:45:58,168 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2396 transitions. [2022-11-20 12:45:58,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2396 transitions. [2022-11-20 12:45:58,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:45:58,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2396 transitions. [2022-11-20 12:45:58,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 266.22222222222223) internal successors, (2396), 9 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:58,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:58,182 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 361.0) internal successors, (3610), 10 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:58,182 INFO L175 Difference]: Start difference. First operand has 293 places, 278 transitions, 622 flow. Second operand 9 states and 2396 transitions. [2022-11-20 12:45:58,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 387 transitions, 1153 flow [2022-11-20 12:45:58,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 387 transitions, 1147 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-20 12:45:58,507 INFO L231 Difference]: Finished difference. Result has 307 places, 308 transitions, 868 flow [2022-11-20 12:45:58,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=361, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=868, PETRI_PLACES=307, PETRI_TRANSITIONS=308} [2022-11-20 12:45:58,508 INFO L288 CegarLoopForPetriNet]: 302 programPoint places, 5 predicate places. [2022-11-20 12:45:58,509 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 308 transitions, 868 flow [2022-11-20 12:45:58,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 250.6) internal successors, (1253), 5 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:58,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:58,509 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:58,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 12:45:58,510 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:58,510 INFO L85 PathProgramCache]: Analyzing trace with hash 352051992, now seen corresponding path program 1 times [2022-11-20 12:45:58,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:58,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500926844] [2022-11-20 12:45:58,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:58,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:45:58,554 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:45:58,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:45:58,610 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:45:58,610 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:45:58,610 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-20 12:45:58,611 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-20 12:45:58,611 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-20 12:45:58,611 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-20 12:45:58,611 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-20 12:45:58,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 12:45:58,612 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 12:45:58,613 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 12:45:58,613 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-20 12:45:58,663 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-20 12:45:58,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 416 transitions, 892 flow [2022-11-20 12:45:58,930 INFO L130 PetriNetUnfolder]: 236/1361 cut-off events. [2022-11-20 12:45:58,930 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-20 12:45:58,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1472 conditions, 1361 events. 236/1361 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 7198 event pairs, 23 based on Foata normal form. 0/1117 useless extension candidates. Maximal degree in co-relation 991. Up to 80 conditions per place. [2022-11-20 12:45:58,946 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 416 transitions, 892 flow [2022-11-20 12:45:58,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 346 places, 416 transitions, 892 flow [2022-11-20 12:45:58,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:45:58,961 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;@7e252aa6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:45:58,961 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 12:45:58,968 INFO L130 PetriNetUnfolder]: 6/102 cut-off events. [2022-11-20 12:45:58,968 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 12:45:58,969 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:58,969 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:58,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:58,970 INFO L85 PathProgramCache]: Analyzing trace with hash -871955612, now seen corresponding path program 1 times [2022-11-20 12:45:58,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:58,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597775004] [2022-11-20 12:45:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:58,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:58,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:58,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597775004] [2022-11-20 12:45:58,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597775004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:58,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:58,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:45:58,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540638203] [2022-11-20 12:45:58,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:58,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:45:58,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:59,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:45:59,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:45:59,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 416 [2022-11-20 12:45:59,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 416 transitions, 892 flow. Second operand has 2 states, 2 states have (on average 327.5) internal successors, (655), 2 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:59,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:45:59,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 416 [2022-11-20 12:45:59,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:45:59,312 INFO L130 PetriNetUnfolder]: 60/1161 cut-off events. [2022-11-20 12:45:59,312 INFO L131 PetriNetUnfolder]: For 285/285 co-relation queries the response was YES. [2022-11-20 12:45:59,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1358 conditions, 1161 events. 60/1161 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 5988 event pairs, 23 based on Foata normal form. 1132/2225 useless extension candidates. Maximal degree in co-relation 873. Up to 86 conditions per place. [2022-11-20 12:45:59,329 INFO L137 encePairwiseOnDemand]: 341/416 looper letters, 5 selfloop transitions, 0 changer transitions 24/337 dead transitions. [2022-11-20 12:45:59,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 337 transitions, 754 flow [2022-11-20 12:45:59,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:45:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:45:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 739 transitions. [2022-11-20 12:45:59,332 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8882211538461539 [2022-11-20 12:45:59,332 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 739 transitions. [2022-11-20 12:45:59,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 739 transitions. [2022-11-20 12:45:59,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:45:59,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 739 transitions. [2022-11-20 12:45:59,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 369.5) internal successors, (739), 2 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:59,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 416.0) internal successors, (1248), 3 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:59,336 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 416.0) internal successors, (1248), 3 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:59,337 INFO L175 Difference]: Start difference. First operand has 346 places, 416 transitions, 892 flow. Second operand 2 states and 739 transitions. [2022-11-20 12:45:59,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 337 transitions, 754 flow [2022-11-20 12:45:59,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 337 transitions, 754 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:45:59,343 INFO L231 Difference]: Finished difference. Result has 343 places, 313 transitions, 671 flow [2022-11-20 12:45:59,344 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=671, PETRI_PLACES=343, PETRI_TRANSITIONS=313} [2022-11-20 12:45:59,345 INFO L288 CegarLoopForPetriNet]: 346 programPoint places, -3 predicate places. [2022-11-20 12:45:59,345 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 313 transitions, 671 flow [2022-11-20 12:45:59,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 327.5) internal successors, (655), 2 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:59,346 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:59,346 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:59,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 12:45:59,346 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:59,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1626060325, now seen corresponding path program 1 times [2022-11-20 12:45:59,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:59,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647131289] [2022-11-20 12:45:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:59,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:59,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:59,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647131289] [2022-11-20 12:45:59,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647131289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:59,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:59,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:45:59,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140561294] [2022-11-20 12:45:59,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:59,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:45:59,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:59,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:45:59,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:45:59,390 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 416 [2022-11-20 12:45:59,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 313 transitions, 671 flow. Second operand has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:59,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:45:59,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 416 [2022-11-20 12:45:59,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:45:59,537 INFO L130 PetriNetUnfolder]: 5/577 cut-off events. [2022-11-20 12:45:59,537 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 12:45:59,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 577 events. 5/577 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2477 event pairs, 0 based on Foata normal form. 0/552 useless extension candidates. Maximal degree in co-relation 636. Up to 30 conditions per place. [2022-11-20 12:45:59,544 INFO L137 encePairwiseOnDemand]: 413/416 looper letters, 14 selfloop transitions, 2 changer transitions 0/317 dead transitions. [2022-11-20 12:45:59,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 317 transitions, 711 flow [2022-11-20 12:45:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:45:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:45:59,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 977 transitions. [2022-11-20 12:45:59,548 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7828525641025641 [2022-11-20 12:45:59,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 977 transitions. [2022-11-20 12:45:59,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 977 transitions. [2022-11-20 12:45:59,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:45:59,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 977 transitions. [2022-11-20 12:45:59,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.6666666666667) internal successors, (977), 3 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:59,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:59,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 416.0) internal successors, (1664), 4 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:59,554 INFO L175 Difference]: Start difference. First operand has 343 places, 313 transitions, 671 flow. Second operand 3 states and 977 transitions. [2022-11-20 12:45:59,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 317 transitions, 711 flow [2022-11-20 12:45:59,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 317 transitions, 691 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-20 12:45:59,560 INFO L231 Difference]: Finished difference. Result has 327 places, 314 transitions, 663 flow [2022-11-20 12:45:59,561 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=663, PETRI_PLACES=327, PETRI_TRANSITIONS=314} [2022-11-20 12:45:59,561 INFO L288 CegarLoopForPetriNet]: 346 programPoint places, -19 predicate places. [2022-11-20 12:45:59,561 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 314 transitions, 663 flow [2022-11-20 12:45:59,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:59,562 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:45:59,562 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:59,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 12:45:59,563 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:45:59,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:59,563 INFO L85 PathProgramCache]: Analyzing trace with hash -355832472, now seen corresponding path program 1 times [2022-11-20 12:45:59,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:59,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153624082] [2022-11-20 12:45:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:59,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:59,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:59,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153624082] [2022-11-20 12:45:59,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153624082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:45:59,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069072890] [2022-11-20 12:45:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:59,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:59,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:45:59,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:45:59,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:45:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:59,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:45:59,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:45:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:59,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:45:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:59,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069072890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:45:59,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:45:59,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 12:45:59,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802669622] [2022-11-20 12:45:59,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:45:59,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:45:59,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:59,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:45:59,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:45:59,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 416 [2022-11-20 12:45:59,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 314 transitions, 663 flow. Second operand has 10 states, 10 states have (on average 321.3) internal successors, (3213), 10 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:45:59,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:45:59,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 416 [2022-11-20 12:45:59,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:46:00,052 INFO L130 PetriNetUnfolder]: 3/465 cut-off events. [2022-11-20 12:46:00,052 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 12:46:00,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 465 events. 3/465 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1652 event pairs, 0 based on Foata normal form. 2/455 useless extension candidates. Maximal degree in co-relation 527. Up to 15 conditions per place. [2022-11-20 12:46:00,058 INFO L137 encePairwiseOnDemand]: 410/416 looper letters, 15 selfloop transitions, 9 changer transitions 0/324 dead transitions. [2022-11-20 12:46:00,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 324 transitions, 733 flow [2022-11-20 12:46:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:46:00,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 12:46:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2897 transitions. [2022-11-20 12:46:00,064 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7737713675213675 [2022-11-20 12:46:00,065 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2897 transitions. [2022-11-20 12:46:00,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2897 transitions. [2022-11-20 12:46:00,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:46:00,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2897 transitions. [2022-11-20 12:46:00,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 321.8888888888889) internal successors, (2897), 9 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:46:00,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 416.0) internal successors, (4160), 10 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:46:00,080 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 416.0) internal successors, (4160), 10 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:46:00,081 INFO L175 Difference]: Start difference. First operand has 327 places, 314 transitions, 663 flow. Second operand 9 states and 2897 transitions. [2022-11-20 12:46:00,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 324 transitions, 733 flow [2022-11-20 12:46:00,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 324 transitions, 731 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:46:00,087 INFO L231 Difference]: Finished difference. Result has 337 places, 320 transitions, 711 flow [2022-11-20 12:46:00,088 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=416, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=711, PETRI_PLACES=337, PETRI_TRANSITIONS=320} [2022-11-20 12:46:00,088 INFO L288 CegarLoopForPetriNet]: 346 programPoint places, -9 predicate places. [2022-11-20 12:46:00,088 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 320 transitions, 711 flow [2022-11-20 12:46:00,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 321.3) internal successors, (3213), 10 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:46:00,090 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:46:00,090 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:00,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:46:00,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5ce2b85-35d7-47cf-984d-d28d13104c07/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:46:00,299 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 12:46:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:00,300 INFO L85 PathProgramCache]: Analyzing trace with hash 399864177, now seen corresponding path program 1 times [2022-11-20 12:46:00,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:00,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778125653] [2022-11-20 12:46:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:00,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 12:46:00,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:00,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778125653] [2022-11-20 12:46:00,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778125653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:00,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:00,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:46:00,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699088544] [2022-11-20 12:46:00,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:00,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:46:00,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:00,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:46:00,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:46:00,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 416 [2022-11-20 12:46:00,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 320 transitions, 711 flow. Second operand has 5 states, 5 states have (on average 287.6) internal successors, (1438), 5 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:46:00,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:46:00,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 416 [2022-11-20 12:46:00,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand