./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a --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 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --- 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-b5237d8 [2022-11-21 16:15:01,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:15:01,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:15:01,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:15:01,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:15:01,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:15:01,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:15:01,261 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:15:01,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:15:01,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:15:01,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:15:01,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:15:01,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:15:01,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:15:01,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:15:01,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:15:01,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:15:01,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:15:01,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:15:01,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:15:01,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:15:01,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:15:01,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:15:01,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:15:01,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:15:01,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:15:01,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:15:01,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:15:01,309 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:15:01,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:15:01,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:15:01,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:15:01,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:15:01,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:15:01,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:15:01,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:15:01,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:15:01,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:15:01,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:15:01,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:15:01,321 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:15:01,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:15:01,359 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:15:01,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:15:01,359 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:15:01,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:15:01,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:15:01,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:15:01,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:15:01,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:15:01,361 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:15:01,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:15:01,362 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:15:01,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:15:01,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:15:01,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:15:01,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:15:01,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:15:01,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:15:01,366 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:15:01,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:15:01,367 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:15:01,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:15:01,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:15:01,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:15:01,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:15:01,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:15:01,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:15:01,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:15:01,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:15:01,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:15:01,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:15:01,370 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:15:01,370 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:15:01,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:15:01,370 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_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 [2022-11-21 16:15:01,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:15:01,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:15:01,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:15:01,683 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:15:01,684 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:15:01,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/pthread/stack_longer-1.i [2022-11-21 16:15:04,722 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:15:05,003 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:15:05,007 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/sv-benchmarks/c/pthread/stack_longer-1.i [2022-11-21 16:15:05,033 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/data/9c8f391fe/218f7105e639432c9e05a48f90de0214/FLAG28311284d [2022-11-21 16:15:05,049 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/data/9c8f391fe/218f7105e639432c9e05a48f90de0214 [2022-11-21 16:15:05,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:15:05,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:15:05,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:15:05,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:15:05,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:15:05,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:15:05" (1/1) ... [2022-11-21 16:15:05,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aac7384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:15:05, skipping insertion in model container [2022-11-21 16:15:05,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:15:05" (1/1) ... [2022-11-21 16:15:05,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:15:05,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:15:05,578 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_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-11-21 16:15:05,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:15:05,628 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:15:05,675 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_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-11-21 16:15:05,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:15:05,752 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:15:05,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:15:05 WrapperNode [2022-11-21 16:15:05,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:15:05,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:15:05,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:15:05,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:15:05,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:15:05" (1/1) ... [2022-11-21 16:15:05,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:15:05" (1/1) ... [2022-11-21 16:15:05,807 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 155 [2022-11-21 16:15:05,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:15:05,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:15:05,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:15:05,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:15:05,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:15:05" (1/1) ... [2022-11-21 16:15:05,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:15:05" (1/1) ... [2022-11-21 16:15:05,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:15:05" (1/1) ... [2022-11-21 16:15:05,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:15:05" (1/1) ... [2022-11-21 16:15:05,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:15:05" (1/1) ... [2022-11-21 16:15:05,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:15:05" (1/1) ... [2022-11-21 16:15:05,871 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:15:05" (1/1) ... [2022-11-21 16:15:05,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:15:05" (1/1) ... [2022-11-21 16:15:05,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:15:05,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:15:05,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:15:05,883 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:15:05,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:15:05" (1/1) ... [2022-11-21 16:15:05,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:15:05,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:15:05,932 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:15:05,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:15:05,980 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-21 16:15:05,980 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-21 16:15:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-21 16:15:05,981 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-21 16:15:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:15:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:15:05,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:15:05,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:15:05,985 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-21 16:15:05,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:15:05,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:15:05,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:15:05,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:15:05,987 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:15:06,129 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:15:06,140 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:15:06,557 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:15:06,572 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:15:06,572 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 16:15:06,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:15:06 BoogieIcfgContainer [2022-11-21 16:15:06,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:15:06,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:15:06,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:15:06,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:15:06,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:15:05" (1/3) ... [2022-11-21 16:15:06,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c343a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:15:06, skipping insertion in model container [2022-11-21 16:15:06,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:15:05" (2/3) ... [2022-11-21 16:15:06,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c343a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:15:06, skipping insertion in model container [2022-11-21 16:15:06,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:15:06" (3/3) ... [2022-11-21 16:15:06,599 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2022-11-21 16:15:06,607 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:15:06,617 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:15:06,617 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-21 16:15:06,618 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:15:06,704 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 16:15:06,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 179 transitions, 374 flow [2022-11-21 16:15:06,817 INFO L130 PetriNetUnfolder]: 10/177 cut-off events. [2022-11-21 16:15:06,818 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 16:15:06,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 10/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 432 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2022-11-21 16:15:06,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 179 transitions, 374 flow [2022-11-21 16:15:06,835 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 167 transitions, 343 flow [2022-11-21 16:15:06,846 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:15:06,852 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;@5928ba1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:15:06,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-21 16:15:06,887 INFO L130 PetriNetUnfolder]: 4/130 cut-off events. [2022-11-21 16:15:06,887 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-21 16:15:06,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:15:06,888 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, 1, 1, 1, 1] [2022-11-21 16:15:06,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:15:06,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:06,894 INFO L85 PathProgramCache]: Analyzing trace with hash 979447583, now seen corresponding path program 1 times [2022-11-21 16:15:06,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:06,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343803945] [2022-11-21 16:15:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:06,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:07,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:07,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343803945] [2022-11-21 16:15:07,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343803945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:15:07,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:15:07,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:15:07,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209001668] [2022-11-21 16:15:07,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:15:07,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:15:07,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:07,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:15:07,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:15:07,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 179 [2022-11-21 16:15:07,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 167 transitions, 343 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:07,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:15:07,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 179 [2022-11-21 16:15:07,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:15:07,848 INFO L130 PetriNetUnfolder]: 91/890 cut-off events. [2022-11-21 16:15:07,849 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-11-21 16:15:07,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 890 events. 91/890 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 5311 event pairs, 15 based on Foata normal form. 61/878 useless extension candidates. Maximal degree in co-relation 903. Up to 96 conditions per place. [2022-11-21 16:15:07,862 INFO L137 encePairwiseOnDemand]: 170/179 looper letters, 19 selfloop transitions, 3 changer transitions 0/167 dead transitions. [2022-11-21 16:15:07,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 167 transitions, 393 flow [2022-11-21 16:15:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:15:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:15:07,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2022-11-21 16:15:07,885 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9422718808193669 [2022-11-21 16:15:07,886 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2022-11-21 16:15:07,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2022-11-21 16:15:07,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:15:07,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2022-11-21 16:15:07,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:07,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:07,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:07,911 INFO L175 Difference]: Start difference. First operand has 164 places, 167 transitions, 343 flow. Second operand 3 states and 506 transitions. [2022-11-21 16:15:07,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 167 transitions, 393 flow [2022-11-21 16:15:07,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 167 transitions, 385 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 16:15:07,923 INFO L231 Difference]: Finished difference. Result has 160 places, 160 transitions, 339 flow [2022-11-21 16:15:07,925 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=160, PETRI_TRANSITIONS=160} [2022-11-21 16:15:07,930 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, -4 predicate places. [2022-11-21 16:15:07,930 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 160 transitions, 339 flow [2022-11-21 16:15:07,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:07,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:15:07,932 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:07,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:15:07,933 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:15:07,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:07,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1987843322, now seen corresponding path program 1 times [2022-11-21 16:15:07,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:07,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596024383] [2022-11-21 16:15:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:07,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:08,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:08,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596024383] [2022-11-21 16:15:08,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596024383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:15:08,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:15:08,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:15:08,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000958982] [2022-11-21 16:15:08,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:15:08,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:15:08,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:08,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:15:08,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:15:08,216 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 179 [2022-11-21 16:15:08,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 160 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:08,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:15:08,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 179 [2022-11-21 16:15:08,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:15:08,318 INFO L130 PetriNetUnfolder]: 21/419 cut-off events. [2022-11-21 16:15:08,318 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-21 16:15:08,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 419 events. 21/419 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1375 event pairs, 4 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 376. Up to 16 conditions per place. [2022-11-21 16:15:08,322 INFO L137 encePairwiseOnDemand]: 176/179 looper letters, 9 selfloop transitions, 2 changer transitions 0/163 dead transitions. [2022-11-21 16:15:08,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 163 transitions, 367 flow [2022-11-21 16:15:08,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:15:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:15:08,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2022-11-21 16:15:08,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9385474860335196 [2022-11-21 16:15:08,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2022-11-21 16:15:08,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2022-11-21 16:15:08,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:15:08,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2022-11-21 16:15:08,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:08,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:08,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:08,330 INFO L175 Difference]: Start difference. First operand has 160 places, 160 transitions, 339 flow. Second operand 3 states and 504 transitions. [2022-11-21 16:15:08,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 163 transitions, 367 flow [2022-11-21 16:15:08,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 163 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:15:08,337 INFO L231 Difference]: Finished difference. Result has 162 places, 160 transitions, 344 flow [2022-11-21 16:15:08,338 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=162, PETRI_TRANSITIONS=160} [2022-11-21 16:15:08,338 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, -2 predicate places. [2022-11-21 16:15:08,339 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 160 transitions, 344 flow [2022-11-21 16:15:08,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:08,339 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:15:08,339 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:08,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:15:08,341 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:15:08,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:08,343 INFO L85 PathProgramCache]: Analyzing trace with hash 69346619, now seen corresponding path program 1 times [2022-11-21 16:15:08,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:08,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473061270] [2022-11-21 16:15:08,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:08,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:08,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:08,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473061270] [2022-11-21 16:15:08,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473061270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:15:08,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:15:08,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:15:08,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789308013] [2022-11-21 16:15:08,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:15:08,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:15:08,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:08,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:15:08,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:15:08,528 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 179 [2022-11-21 16:15:08,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 160 transitions, 344 flow. Second operand has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 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) [2022-11-21 16:15:08,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:15:08,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 179 [2022-11-21 16:15:08,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:15:08,672 INFO L130 PetriNetUnfolder]: 41/516 cut-off events. [2022-11-21 16:15:08,673 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-21 16:15:08,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 516 events. 41/516 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2040 event pairs, 13 based on Foata normal form. 0/485 useless extension candidates. Maximal degree in co-relation 403. Up to 37 conditions per place. [2022-11-21 16:15:08,677 INFO L137 encePairwiseOnDemand]: 174/179 looper letters, 16 selfloop transitions, 4 changer transitions 0/168 dead transitions. [2022-11-21 16:15:08,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 168 transitions, 405 flow [2022-11-21 16:15:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:15:08,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:15:08,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 657 transitions. [2022-11-21 16:15:08,680 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9175977653631285 [2022-11-21 16:15:08,681 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 657 transitions. [2022-11-21 16:15:08,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 657 transitions. [2022-11-21 16:15:08,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:15:08,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 657 transitions. [2022-11-21 16:15:08,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:08,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:08,688 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:08,688 INFO L175 Difference]: Start difference. First operand has 162 places, 160 transitions, 344 flow. Second operand 4 states and 657 transitions. [2022-11-21 16:15:08,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 168 transitions, 405 flow [2022-11-21 16:15:08,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 168 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:15:08,696 INFO L231 Difference]: Finished difference. Result has 166 places, 163 transitions, 370 flow [2022-11-21 16:15:08,696 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=370, PETRI_PLACES=166, PETRI_TRANSITIONS=163} [2022-11-21 16:15:08,698 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 2 predicate places. [2022-11-21 16:15:08,698 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 163 transitions, 370 flow [2022-11-21 16:15:08,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 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) [2022-11-21 16:15:08,699 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:15:08,699 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:08,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:15:08,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:15:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:08,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1454932865, now seen corresponding path program 1 times [2022-11-21 16:15:08,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:08,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297064562] [2022-11-21 16:15:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:08,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:09,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:09,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297064562] [2022-11-21 16:15:09,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297064562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:15:09,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368906846] [2022-11-21 16:15:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:09,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:09,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:15:09,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:15:09,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:15:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:09,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:15:09,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:15:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:09,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:15:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:09,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368906846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:15:09,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:15:09,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 16:15:09,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365286036] [2022-11-21 16:15:09,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:15:09,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:15:09,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:09,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:15:09,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:15:09,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 179 [2022-11-21 16:15:09,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 163 transitions, 370 flow. Second operand has 10 states, 10 states have (on average 158.5) internal successors, (1585), 10 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:09,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:15:09,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 179 [2022-11-21 16:15:09,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:15:10,099 INFO L130 PetriNetUnfolder]: 177/1703 cut-off events. [2022-11-21 16:15:10,099 INFO L131 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2022-11-21 16:15:10,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2264 conditions, 1703 events. 177/1703 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 11095 event pairs, 28 based on Foata normal form. 9/1617 useless extension candidates. Maximal degree in co-relation 1786. Up to 135 conditions per place. [2022-11-21 16:15:10,117 INFO L137 encePairwiseOnDemand]: 173/179 looper letters, 48 selfloop transitions, 14 changer transitions 0/209 dead transitions. [2022-11-21 16:15:10,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 209 transitions, 619 flow [2022-11-21 16:15:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:15:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-21 16:15:10,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1624 transitions. [2022-11-21 16:15:10,122 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9072625698324023 [2022-11-21 16:15:10,122 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1624 transitions. [2022-11-21 16:15:10,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1624 transitions. [2022-11-21 16:15:10,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:15:10,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1624 transitions. [2022-11-21 16:15:10,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 162.4) internal successors, (1624), 10 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:10,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 179.0) internal successors, (1969), 11 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:10,138 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 179.0) internal successors, (1969), 11 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:10,138 INFO L175 Difference]: Start difference. First operand has 166 places, 163 transitions, 370 flow. Second operand 10 states and 1624 transitions. [2022-11-21 16:15:10,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 209 transitions, 619 flow [2022-11-21 16:15:10,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 209 transitions, 617 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:15:10,144 INFO L231 Difference]: Finished difference. Result has 177 places, 176 transitions, 462 flow [2022-11-21 16:15:10,144 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=462, PETRI_PLACES=177, PETRI_TRANSITIONS=176} [2022-11-21 16:15:10,145 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 13 predicate places. [2022-11-21 16:15:10,145 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 176 transitions, 462 flow [2022-11-21 16:15:10,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 158.5) internal successors, (1585), 10 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:10,146 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:15:10,147 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:10,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:15:10,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:15:10,352 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:15:10,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:10,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1825277643, now seen corresponding path program 1 times [2022-11-21 16:15:10,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:10,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333542969] [2022-11-21 16:15:10,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:10,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:10,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:10,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333542969] [2022-11-21 16:15:10,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333542969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:15:10,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:15:10,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:15:10,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726824405] [2022-11-21 16:15:10,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:15:10,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:15:10,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:15:10,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:15:10,520 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 179 [2022-11-21 16:15:10,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 176 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:10,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:15:10,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 179 [2022-11-21 16:15:10,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:15:10,722 INFO L130 PetriNetUnfolder]: 50/1065 cut-off events. [2022-11-21 16:15:10,722 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-11-21 16:15:10,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1361 conditions, 1065 events. 50/1065 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4611 event pairs, 10 based on Foata normal form. 12/1031 useless extension candidates. Maximal degree in co-relation 998. Up to 46 conditions per place. [2022-11-21 16:15:10,727 INFO L137 encePairwiseOnDemand]: 175/179 looper letters, 12 selfloop transitions, 4 changer transitions 0/173 dead transitions. [2022-11-21 16:15:10,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 173 transitions, 473 flow [2022-11-21 16:15:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:15:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 16:15:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2022-11-21 16:15:10,729 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9106145251396648 [2022-11-21 16:15:10,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2022-11-21 16:15:10,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2022-11-21 16:15:10,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:15:10,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2022-11-21 16:15:10,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:10,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:10,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:10,733 INFO L175 Difference]: Start difference. First operand has 177 places, 176 transitions, 462 flow. Second operand 3 states and 489 transitions. [2022-11-21 16:15:10,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 173 transitions, 473 flow [2022-11-21 16:15:10,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 173 transitions, 461 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-21 16:15:10,737 INFO L231 Difference]: Finished difference. Result has 177 places, 171 transitions, 430 flow [2022-11-21 16:15:10,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=430, PETRI_PLACES=177, PETRI_TRANSITIONS=171} [2022-11-21 16:15:10,738 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 13 predicate places. [2022-11-21 16:15:10,739 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 171 transitions, 430 flow [2022-11-21 16:15:10,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:10,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:15:10,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:10,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:15:10,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:15:10,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:10,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1732705704, now seen corresponding path program 1 times [2022-11-21 16:15:10,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:10,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845407348] [2022-11-21 16:15:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:10,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:10,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:10,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845407348] [2022-11-21 16:15:10,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845407348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:15:10,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:15:10,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:15:10,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39725024] [2022-11-21 16:15:10,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:15:10,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:15:10,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:15:10,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:15:10,908 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 179 [2022-11-21 16:15:10,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 171 transitions, 430 flow. Second operand has 7 states, 7 states have (on average 148.28571428571428) internal successors, (1038), 7 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:10,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:15:10,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 179 [2022-11-21 16:15:10,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:15:11,265 INFO L130 PetriNetUnfolder]: 116/1219 cut-off events. [2022-11-21 16:15:11,266 INFO L131 PetriNetUnfolder]: For 131/131 co-relation queries the response was YES. [2022-11-21 16:15:11,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1823 conditions, 1219 events. 116/1219 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6018 event pairs, 19 based on Foata normal form. 0/1167 useless extension candidates. Maximal degree in co-relation 1103. Up to 178 conditions per place. [2022-11-21 16:15:11,271 INFO L137 encePairwiseOnDemand]: 168/179 looper letters, 49 selfloop transitions, 13 changer transitions 0/199 dead transitions. [2022-11-21 16:15:11,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 199 transitions, 639 flow [2022-11-21 16:15:11,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:15:11,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:15:11,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1371 transitions. [2022-11-21 16:15:11,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.851024208566108 [2022-11-21 16:15:11,275 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1371 transitions. [2022-11-21 16:15:11,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1371 transitions. [2022-11-21 16:15:11,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:15:11,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1371 transitions. [2022-11-21 16:15:11,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.33333333333334) internal successors, (1371), 9 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:11,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:11,283 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:11,283 INFO L175 Difference]: Start difference. First operand has 177 places, 171 transitions, 430 flow. Second operand 9 states and 1371 transitions. [2022-11-21 16:15:11,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 199 transitions, 639 flow [2022-11-21 16:15:11,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 199 transitions, 635 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:15:11,288 INFO L231 Difference]: Finished difference. Result has 189 places, 178 transitions, 514 flow [2022-11-21 16:15:11,288 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=514, PETRI_PLACES=189, PETRI_TRANSITIONS=178} [2022-11-21 16:15:11,289 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 25 predicate places. [2022-11-21 16:15:11,289 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 178 transitions, 514 flow [2022-11-21 16:15:11,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.28571428571428) internal successors, (1038), 7 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:11,290 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:15:11,290 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:11,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:15:11,291 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:15:11,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:11,291 INFO L85 PathProgramCache]: Analyzing trace with hash 274613282, now seen corresponding path program 1 times [2022-11-21 16:15:11,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:11,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554854639] [2022-11-21 16:15:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:11,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:13,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:13,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554854639] [2022-11-21 16:15:13,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554854639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:15:13,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:15:13,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-11-21 16:15:13,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725829412] [2022-11-21 16:15:13,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:15:13,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:15:13,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:13,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:15:13,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:15:13,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 179 [2022-11-21 16:15:13,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 178 transitions, 514 flow. Second operand has 24 states, 24 states have (on average 107.41666666666667) internal successors, (2578), 24 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:13,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:15:13,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 179 [2022-11-21 16:15:13,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:15:16,381 INFO L130 PetriNetUnfolder]: 1008/3988 cut-off events. [2022-11-21 16:15:16,381 INFO L131 PetriNetUnfolder]: For 554/554 co-relation queries the response was YES. [2022-11-21 16:15:16,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7445 conditions, 3988 events. 1008/3988 cut-off events. For 554/554 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 28676 event pairs, 174 based on Foata normal form. 0/3864 useless extension candidates. Maximal degree in co-relation 4391. Up to 1516 conditions per place. [2022-11-21 16:15:16,409 INFO L137 encePairwiseOnDemand]: 145/179 looper letters, 229 selfloop transitions, 42 changer transitions 4/372 dead transitions. [2022-11-21 16:15:16,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 372 transitions, 1586 flow [2022-11-21 16:15:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-21 16:15:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-21 16:15:16,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3515 transitions. [2022-11-21 16:15:16,418 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6334474680122545 [2022-11-21 16:15:16,418 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3515 transitions. [2022-11-21 16:15:16,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3515 transitions. [2022-11-21 16:15:16,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:15:16,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3515 transitions. [2022-11-21 16:15:16,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 113.38709677419355) internal successors, (3515), 31 states have internal predecessors, (3515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:16,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:16,440 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:16,441 INFO L175 Difference]: Start difference. First operand has 189 places, 178 transitions, 514 flow. Second operand 31 states and 3515 transitions. [2022-11-21 16:15:16,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 372 transitions, 1586 flow [2022-11-21 16:15:16,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 372 transitions, 1569 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-21 16:15:16,451 INFO L231 Difference]: Finished difference. Result has 243 places, 216 transitions, 829 flow [2022-11-21 16:15:16,452 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=829, PETRI_PLACES=243, PETRI_TRANSITIONS=216} [2022-11-21 16:15:16,452 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 79 predicate places. [2022-11-21 16:15:16,453 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 216 transitions, 829 flow [2022-11-21 16:15:16,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.41666666666667) internal successors, (2578), 24 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:16,454 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:15:16,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:16,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:15:16,455 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:15:16,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:16,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1950908668, now seen corresponding path program 2 times [2022-11-21 16:15:16,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:16,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907070337] [2022-11-21 16:15:16,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:16,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:16,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:19,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:19,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907070337] [2022-11-21 16:15:19,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907070337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:15:19,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:15:19,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-21 16:15:19,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495000761] [2022-11-21 16:15:19,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:15:19,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 16:15:19,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:19,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 16:15:19,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-11-21 16:15:19,013 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 179 [2022-11-21 16:15:19,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 216 transitions, 829 flow. Second operand has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:19,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:15:19,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 179 [2022-11-21 16:15:19,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:15:24,083 INFO L130 PetriNetUnfolder]: 1256/5024 cut-off events. [2022-11-21 16:15:24,083 INFO L131 PetriNetUnfolder]: For 2356/2356 co-relation queries the response was YES. [2022-11-21 16:15:24,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11006 conditions, 5024 events. 1256/5024 cut-off events. For 2356/2356 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 39139 event pairs, 298 based on Foata normal form. 4/4941 useless extension candidates. Maximal degree in co-relation 6762. Up to 1537 conditions per place. [2022-11-21 16:15:24,141 INFO L137 encePairwiseOnDemand]: 143/179 looper letters, 234 selfloop transitions, 60 changer transitions 4/387 dead transitions. [2022-11-21 16:15:24,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 387 transitions, 2078 flow [2022-11-21 16:15:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-21 16:15:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-21 16:15:24,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3234 transitions. [2022-11-21 16:15:24,153 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5645949720670391 [2022-11-21 16:15:24,153 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3234 transitions. [2022-11-21 16:15:24,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3234 transitions. [2022-11-21 16:15:24,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:15:24,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3234 transitions. [2022-11-21 16:15:24,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 101.0625) internal successors, (3234), 32 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:24,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 179.0) internal successors, (5907), 33 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:24,188 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 179.0) internal successors, (5907), 33 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:24,188 INFO L175 Difference]: Start difference. First operand has 243 places, 216 transitions, 829 flow. Second operand 32 states and 3234 transitions. [2022-11-21 16:15:24,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 387 transitions, 2078 flow [2022-11-21 16:15:24,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 387 transitions, 2074 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-21 16:15:24,216 INFO L231 Difference]: Finished difference. Result has 287 places, 235 transitions, 1151 flow [2022-11-21 16:15:24,217 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1151, PETRI_PLACES=287, PETRI_TRANSITIONS=235} [2022-11-21 16:15:24,221 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 123 predicate places. [2022-11-21 16:15:24,222 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 235 transitions, 1151 flow [2022-11-21 16:15:24,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:24,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:15:24,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:24,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:15:24,224 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:15:24,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:24,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1956140604, now seen corresponding path program 3 times [2022-11-21 16:15:24,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:24,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100487938] [2022-11-21 16:15:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:24,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:15:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:15:26,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:15:26,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100487938] [2022-11-21 16:15:26,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100487938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:15:26,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:15:26,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-21 16:15:26,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896271862] [2022-11-21 16:15:26,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:15:26,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 16:15:26,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:15:26,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 16:15:26,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-11-21 16:15:26,587 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 179 [2022-11-21 16:15:26,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 235 transitions, 1151 flow. Second operand has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:26,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:15:26,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 179 [2022-11-21 16:15:26,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:15:31,632 INFO L130 PetriNetUnfolder]: 1414/5666 cut-off events. [2022-11-21 16:15:31,632 INFO L131 PetriNetUnfolder]: For 3828/3828 co-relation queries the response was YES. [2022-11-21 16:15:31,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13236 conditions, 5666 events. 1414/5666 cut-off events. For 3828/3828 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 45851 event pairs, 64 based on Foata normal form. 4/5573 useless extension candidates. Maximal degree in co-relation 7334. Up to 1326 conditions per place. [2022-11-21 16:15:31,679 INFO L137 encePairwiseOnDemand]: 144/179 looper letters, 237 selfloop transitions, 78 changer transitions 4/408 dead transitions. [2022-11-21 16:15:31,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 408 transitions, 2490 flow [2022-11-21 16:15:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-21 16:15:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-21 16:15:31,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3426 transitions. [2022-11-21 16:15:31,690 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.562931317778508 [2022-11-21 16:15:31,690 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3426 transitions. [2022-11-21 16:15:31,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3426 transitions. [2022-11-21 16:15:31,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:15:31,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3426 transitions. [2022-11-21 16:15:31,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 100.76470588235294) internal successors, (3426), 34 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:31,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 179.0) internal successors, (6265), 35 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:31,719 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 179.0) internal successors, (6265), 35 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:31,719 INFO L175 Difference]: Start difference. First operand has 287 places, 235 transitions, 1151 flow. Second operand 34 states and 3426 transitions. [2022-11-21 16:15:31,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 408 transitions, 2490 flow [2022-11-21 16:15:31,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 408 transitions, 2395 flow, removed 27 selfloop flow, removed 15 redundant places. [2022-11-21 16:15:31,750 INFO L231 Difference]: Finished difference. Result has 318 places, 252 transitions, 1460 flow [2022-11-21 16:15:31,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1460, PETRI_PLACES=318, PETRI_TRANSITIONS=252} [2022-11-21 16:15:31,751 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 154 predicate places. [2022-11-21 16:15:31,752 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 252 transitions, 1460 flow [2022-11-21 16:15:31,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:15:31,754 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:15:31,754 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:31,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:15:31,755 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 16:15:31,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:15:31,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1138157486, now seen corresponding path program 1 times [2022-11-21 16:15:31,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:15:31,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428144208] [2022-11-21 16:15:31,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:15:31,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:15:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:15:31,901 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:15:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:15:32,004 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:15:32,005 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:15:32,006 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-11-21 16:15:32,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-11-21 16:15:32,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-11-21 16:15:32,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-21 16:15:32,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-21 16:15:32,013 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-21 16:15:32,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:15:32,013 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:15:32,021 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-21 16:15:32,022 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-21 16:15:32,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 04:15:32 BasicIcfg [2022-11-21 16:15:32,210 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-21 16:15:32,211 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-21 16:15:32,211 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-21 16:15:32,211 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-21 16:15:32,212 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:15:06" (3/4) ... [2022-11-21 16:15:32,214 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-21 16:15:32,421 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/witness.graphml [2022-11-21 16:15:32,422 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-21 16:15:32,422 INFO L158 Benchmark]: Toolchain (without parser) took 27369.36ms. Allocated memory was 172.0MB in the beginning and 876.6MB in the end (delta: 704.6MB). Free memory was 135.9MB in the beginning and 597.0MB in the end (delta: -461.1MB). Peak memory consumption was 243.6MB. Max. memory is 16.1GB. [2022-11-21 16:15:32,423 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory was 97.9MB in the beginning and 97.7MB in the end (delta: 126.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-21 16:15:32,423 INFO L158 Benchmark]: CACSL2BoogieTranslator took 697.87ms. Allocated memory is still 172.0MB. Free memory was 135.9MB in the beginning and 118.3MB in the end (delta: 17.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-21 16:15:32,424 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.12ms. Allocated memory is still 172.0MB. Free memory was 118.3MB in the beginning and 116.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 16:15:32,424 INFO L158 Benchmark]: Boogie Preprocessor took 73.64ms. Allocated memory is still 172.0MB. Free memory was 116.2MB in the beginning and 114.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-21 16:15:32,424 INFO L158 Benchmark]: RCFGBuilder took 692.10ms. Allocated memory is still 172.0MB. Free memory was 114.1MB in the beginning and 95.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-21 16:15:32,425 INFO L158 Benchmark]: TraceAbstraction took 25634.02ms. Allocated memory was 172.0MB in the beginning and 876.6MB in the end (delta: 704.6MB). Free memory was 95.2MB in the beginning and 635.7MB in the end (delta: -540.6MB). Peak memory consumption was 167.2MB. Max. memory is 16.1GB. [2022-11-21 16:15:32,425 INFO L158 Benchmark]: Witness Printer took 211.06ms. Allocated memory is still 876.6MB. Free memory was 635.7MB in the beginning and 597.0MB in the end (delta: 38.8MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2022-11-21 16:15:32,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory was 97.9MB in the beginning and 97.7MB in the end (delta: 126.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 697.87ms. Allocated memory is still 172.0MB. Free memory was 135.9MB in the beginning and 118.3MB in the end (delta: 17.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.12ms. Allocated memory is still 172.0MB. Free memory was 118.3MB in the beginning and 116.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 73.64ms. Allocated memory is still 172.0MB. Free memory was 116.2MB in the beginning and 114.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 692.10ms. Allocated memory is still 172.0MB. Free memory was 114.1MB in the beginning and 95.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 25634.02ms. Allocated memory was 172.0MB in the beginning and 876.6MB in the end (delta: 704.6MB). Free memory was 95.2MB in the beginning and 635.7MB in the end (delta: -540.6MB). Peak memory consumption was 167.2MB. Max. memory is 16.1GB. * Witness Printer took 211.06ms. Allocated memory is still 876.6MB. Free memory was 635.7MB in the beginning and 597.0MB in the end (delta: 38.8MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 940]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; VAL [top=0] [L936] 0 static unsigned int arr[(400)]; VAL [arr={3:0}, top=0] [L937] 0 pthread_mutex_t m; VAL [arr={3:0}, m={4:0}, top=0] [L938] 0 _Bool flag=(0); VAL [arr={3:0}, flag=0, m={4:0}, top=0] [L1019] 0 pthread_t id1, id2; VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, top=0] [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L988] 1 int i; VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, m={4:0}, top=0] [L989] 1 unsigned int tmp; VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, m={4:0}, top=0] [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L990] COND TRUE 1 i<(400) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L993] 1 tmp = __VERIFIER_nondet_uint() VAL [__VERIFIER_nondet_uint()=4294967695, arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, tmp=399, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) VAL [\old(cond)=1, arr={3:0}, cond=1, flag=0, m={4:0}, top=0] [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) VAL [\old(x)=399, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=399] [L967] CALL, EXPR 1 get_top() [L952] 1 return top; VAL [\result=0, arr={3:0}, flag=0, m={4:0}, top=0] [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x VAL [\old(x)=399, arr={3:0}, flag=0, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=399] [L968] CALL 1 inc_top() [L944] 1 top++ VAL [arr={3:0}, flag=0, m={4:0}, top=1] [L1004] 2 int i; VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, m={4:0}, top=1] [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=1] [L1005] COND TRUE 2 i<(400) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=1] [L968] RET 1 inc_top() [L970] 1 return 0; VAL [\old(x)=399, \result=0, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=1, x=399] [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, push(arr,tmp)=0, tmp=399, top=1] [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=399, top=1] [L1008] COND TRUE 2 \read(flag) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; VAL [\result=1, \result=0, arr={3:0}, flag=1, m={4:0}, top=1] [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) VAL [arr={3:0}, flag=1, get_top()=1, m={4:0}, stack={3:0}, stack={3:0}, top=1] [L981] CALL 2 dec_top() [L948] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] VAL [arr={3:0}, flag=1, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, stack[get_top()]=399, top=0] [L982] 2 return stack[get_top()]; VAL [\result=399, arr={3:0}, flag=1, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, stack[get_top()]=399, top=0] [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, pop(arr)=399, top=0] [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1008] COND TRUE 2 \read(flag) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 VAL [arr={3:0}, flag=1, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0] [L977] 2 return (-2); VAL [\result=-2, arr={3:0}, flag=1, m={4:0}, stack={3:0}, stack={3:0}, top=0] [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, pop(arr)=-2, top=0] [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 288 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 25.3s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 15.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1284 SdHoareTripleChecker+Valid, 4.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1284 mSDsluCounter, 2902 SdHoareTripleChecker+Invalid, 4.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2673 mSDsCounter, 36 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5680 IncrementalHoareTripleChecker+Invalid, 5716 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 36 mSolverCounterUnsat, 229 mSDtfsCounter, 5680 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 396 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 6.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1460occurred in iteration=9, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 1156 NumberOfCodeBlocks, 1156 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 1098 ConstructedInterpolants, 0 QuantifiedInterpolants, 8595 SizeOfPredicates, 2 NumberOfNonLiveVariables, 240 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 12/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-21 16:15:32,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22b1ec8c-28a6-4788-a01d-d4b84cfefabf/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE