./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack_longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dadbc714432dbabd9f10b5aceb2a2ff8af11608da70d21414f772d02695c7806 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:26:03,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:26:03,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:26:03,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:26:03,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:26:03,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:26:03,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:26:03,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:26:03,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:26:03,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:26:03,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:26:03,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:26:03,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:26:03,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:26:03,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:26:03,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:26:03,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:26:03,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:26:03,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:26:03,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:26:03,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:26:03,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:26:03,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:26:03,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:26:03,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:26:03,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:26:03,210 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:26:03,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:26:03,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:26:03,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:26:03,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:26:03,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:26:03,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:26:03,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:26:03,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:26:03,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:26:03,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:26:03,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:26:03,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:26:03,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:26:03,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:26:03,218 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:26:03,237 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:26:03,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:26:03,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:26:03,238 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:26:03,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:26:03,239 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:26:03,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:26:03,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:26:03,240 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:26:03,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:26:03,240 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:26:03,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:26:03,241 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:26:03,241 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:26:03,241 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:26:03,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:26:03,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:26:03,241 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:26:03,242 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:26:03,242 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:26:03,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:26:03,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:26:03,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:26:03,242 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:26:03,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:26:03,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:26:03,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:26:03,243 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:26:03,243 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:26:03,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:26:03,244 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:26:03,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:26:03,244 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:26:03,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:26:03,244 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:26:03,244 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dadbc714432dbabd9f10b5aceb2a2ff8af11608da70d21414f772d02695c7806 [2022-12-13 17:26:03,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:26:03,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:26:03,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:26:03,459 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:26:03,460 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:26:03,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/25_stack_longer-2.i [2022-12-13 17:26:06,038 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:26:06,276 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:26:06,277 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/sv-benchmarks/c/pthread-ext/25_stack_longer-2.i [2022-12-13 17:26:06,288 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/bin/uautomizer-uyxdKDjOR8/data/40ba7589e/7afe746ea7634fccbb2290cc8cb1264d/FLAG7591edd9c [2022-12-13 17:26:06,620 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/bin/uautomizer-uyxdKDjOR8/data/40ba7589e/7afe746ea7634fccbb2290cc8cb1264d [2022-12-13 17:26:06,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:26:06,624 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:26:06,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:26:06,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:26:06,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:26:06,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:26:06" (1/1) ... [2022-12-13 17:26:06,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e6b7934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:26:06, skipping insertion in model container [2022-12-13 17:26:06,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:26:06" (1/1) ... [2022-12-13 17:26:06,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:26:06,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:26:06,865 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_1ca140f1-09b6-4d51-982d-7028e5b09b62/sv-benchmarks/c/pthread-ext/25_stack_longer-2.i[31039,31052] [2022-12-13 17:26:06,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:26:06,881 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:26:06,915 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_1ca140f1-09b6-4d51-982d-7028e5b09b62/sv-benchmarks/c/pthread-ext/25_stack_longer-2.i[31039,31052] [2022-12-13 17:26:06,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:26:06,960 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:26:06,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:26:06 WrapperNode [2022-12-13 17:26:06,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:26:06,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:26:06,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:26:06,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:26:06,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:26:06" (1/1) ... [2022-12-13 17:26:06,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:26:06" (1/1) ... [2022-12-13 17:26:06,994 INFO L138 Inliner]: procedures = 177, calls = 34, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 172 [2022-12-13 17:26:06,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:26:06,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:26:06,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:26:06,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:26:07,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:26:06" (1/1) ... [2022-12-13 17:26:07,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:26:06" (1/1) ... [2022-12-13 17:26:07,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:26:06" (1/1) ... [2022-12-13 17:26:07,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:26:06" (1/1) ... [2022-12-13 17:26:07,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:26:06" (1/1) ... [2022-12-13 17:26:07,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:26:06" (1/1) ... [2022-12-13 17:26:07,019 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:26:06" (1/1) ... [2022-12-13 17:26:07,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:26:06" (1/1) ... [2022-12-13 17:26:07,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:26:07,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:26:07,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:26:07,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:26:07,023 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:26:06" (1/1) ... [2022-12-13 17:26:07,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:26:07,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:26:07,050 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:26:07,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ca140f1-09b6-4d51-982d-7028e5b09b62/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:26:07,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:26:07,084 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 17:26:07,084 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 17:26:07,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:26:07,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:26:07,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:26:07,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:26:07,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:26:07,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:26:07,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:26:07,086 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 17:26:07,200 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:26:07,202 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:26:07,428 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:26:07,554 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:26:07,554 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 17:26:07,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:26:07 BoogieIcfgContainer [2022-12-13 17:26:07,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:26:07,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:26:07,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:26:07,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:26:07,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:26:06" (1/3) ... [2022-12-13 17:26:07,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270a7d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:26:07, skipping insertion in model container [2022-12-13 17:26:07,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:26:06" (2/3) ... [2022-12-13 17:26:07,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270a7d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:26:07, skipping insertion in model container [2022-12-13 17:26:07,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:26:07" (3/3) ... [2022-12-13 17:26:07,564 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longer-2.i [2022-12-13 17:26:07,571 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 17:26:07,578 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:26:07,578 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:26:07,579 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:26:07,635 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:26:07,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 106 transitions, 217 flow [2022-12-13 17:26:07,711 INFO L130 PetriNetUnfolder]: 8/117 cut-off events. [2022-12-13 17:26:07,711 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:26:07,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 117 events. 8/117 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 120 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-12-13 17:26:07,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 106 transitions, 217 flow [2022-12-13 17:26:07,718 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 106 transitions, 217 flow [2022-12-13 17:26:07,721 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:26:07,729 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 106 transitions, 217 flow [2022-12-13 17:26:07,732 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 106 transitions, 217 flow [2022-12-13 17:26:07,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 106 transitions, 217 flow [2022-12-13 17:26:07,752 INFO L130 PetriNetUnfolder]: 8/117 cut-off events. [2022-12-13 17:26:07,752 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:26:07,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 117 events. 8/117 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 120 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2022-12-13 17:26:07,754 INFO L119 LiptonReduction]: Number of co-enabled transitions 1904 [2022-12-13 17:26:11,212 INFO L134 LiptonReduction]: Checked pairs total: 1840 [2022-12-13 17:26:11,212 INFO L136 LiptonReduction]: Total number of compositions: 107 [2022-12-13 17:26:11,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:26:11,227 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;@43ae69fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:26:11,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 17:26:11,229 INFO L130 PetriNetUnfolder]: 1/11 cut-off events. [2022-12-13 17:26:11,230 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:26:11,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:26:11,230 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 17:26:11,230 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:26:11,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:26:11,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1094148862, now seen corresponding path program 1 times [2022-12-13 17:26:11,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:26:11,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977691325] [2022-12-13 17:26:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:26:11,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:26:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:26:11,323 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:26:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:26:11,357 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:26:11,358 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:26:11,359 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-13 17:26:11,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-13 17:26:11,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-13 17:26:11,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:26:11,361 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-13 17:26:11,365 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:26:11,365 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 17:26:11,410 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:26:11,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 175 transitions, 362 flow [2022-12-13 17:26:11,453 INFO L130 PetriNetUnfolder]: 15/199 cut-off events. [2022-12-13 17:26:11,453 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:26:11,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 199 events. 15/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 378 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 149. Up to 6 conditions per place. [2022-12-13 17:26:11,456 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 175 transitions, 362 flow [2022-12-13 17:26:11,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 175 transitions, 362 flow [2022-12-13 17:26:11,458 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:26:11,458 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 175 transitions, 362 flow [2022-12-13 17:26:11,458 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 175 transitions, 362 flow [2022-12-13 17:26:11,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 175 transitions, 362 flow [2022-12-13 17:26:11,478 INFO L130 PetriNetUnfolder]: 15/199 cut-off events. [2022-12-13 17:26:11,478 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:26:11,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 199 events. 15/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 378 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 149. Up to 6 conditions per place. [2022-12-13 17:26:11,483 INFO L119 LiptonReduction]: Number of co-enabled transitions 13192 [2022-12-13 17:26:15,418 INFO L134 LiptonReduction]: Checked pairs total: 29027 [2022-12-13 17:26:15,418 INFO L136 LiptonReduction]: Total number of compositions: 141 [2022-12-13 17:26:15,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:26:15,421 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;@43ae69fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:26:15,421 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 17:26:15,429 INFO L130 PetriNetUnfolder]: 2/32 cut-off events. [2022-12-13 17:26:15,429 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:26:15,429 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:26:15,429 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 17:26:15,430 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 17:26:15,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:26:15,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1450657678, now seen corresponding path program 1 times [2022-12-13 17:26:15,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:26:15,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115102331] [2022-12-13 17:26:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:26:15,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:26:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:26:15,456 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:26:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:26:15,471 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:26:15,471 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:26:15,471 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 17:26:15,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 17:26:15,471 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 17:26:15,472 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 17:26:15,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:26:15,472 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-13 17:26:15,472 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:26:15,472 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 17:26:15,512 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:26:15,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 244 transitions, 509 flow [2022-12-13 17:26:15,545 INFO L130 PetriNetUnfolder]: 22/281 cut-off events. [2022-12-13 17:26:15,545 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 17:26:15,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 281 events. 22/281 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 742 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2022-12-13 17:26:15,547 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 244 transitions, 509 flow [2022-12-13 17:26:15,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 244 transitions, 509 flow [2022-12-13 17:26:15,549 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:26:15,549 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 232 places, 244 transitions, 509 flow [2022-12-13 17:26:15,549 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 232 places, 244 transitions, 509 flow [2022-12-13 17:26:15,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 244 transitions, 509 flow [2022-12-13 17:26:15,577 INFO L130 PetriNetUnfolder]: 22/281 cut-off events. [2022-12-13 17:26:15,578 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 17:26:15,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 281 events. 22/281 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 742 event pairs, 0 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 217. Up to 8 conditions per place. [2022-12-13 17:26:15,588 INFO L119 LiptonReduction]: Number of co-enabled transitions 33864 [2022-12-13 17:26:20,239 INFO L134 LiptonReduction]: Checked pairs total: 76039 [2022-12-13 17:26:20,239 INFO L136 LiptonReduction]: Total number of compositions: 192 [2022-12-13 17:26:20,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:26:20,241 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;@43ae69fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:26:20,241 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 17:26:20,245 INFO L130 PetriNetUnfolder]: 6/48 cut-off events. [2022-12-13 17:26:20,245 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 17:26:20,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:26:20,245 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:26:20,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 17:26:20,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:26:20,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1301429481, now seen corresponding path program 1 times [2022-12-13 17:26:20,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:26:20,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748684437] [2022-12-13 17:26:20,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:26:20,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:26:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:26:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:26:20,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:26:20,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748684437] [2022-12-13 17:26:20,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748684437] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:26:20,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:26:20,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:26:20,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125482616] [2022-12-13 17:26:20,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:26:20,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:26:20,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:26:20,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:26:20,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:26:20,407 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 436 [2022-12-13 17:26:20,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 86 transitions, 193 flow. Second operand has 4 states, 4 states have (on average 198.75) internal successors, (795), 4 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:20,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:26:20,412 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 436 [2022-12-13 17:26:20,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:26:23,618 INFO L130 PetriNetUnfolder]: 24839/38761 cut-off events. [2022-12-13 17:26:23,619 INFO L131 PetriNetUnfolder]: For 1663/1663 co-relation queries the response was YES. [2022-12-13 17:26:23,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72980 conditions, 38761 events. 24839/38761 cut-off events. For 1663/1663 co-relation queries the response was YES. Maximal size of possible extension queue 1731. Compared 307242 event pairs, 3489 based on Foata normal form. 514/32053 useless extension candidates. Maximal degree in co-relation 34394. Up to 17720 conditions per place. [2022-12-13 17:26:23,816 INFO L137 encePairwiseOnDemand]: 420/436 looper letters, 160 selfloop transitions, 15 changer transitions 0/203 dead transitions. [2022-12-13 17:26:23,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 203 transitions, 808 flow [2022-12-13 17:26:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:26:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:26:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1175 transitions. [2022-12-13 17:26:23,833 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5389908256880734 [2022-12-13 17:26:23,834 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1175 transitions. [2022-12-13 17:26:23,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1175 transitions. [2022-12-13 17:26:23,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:26:23,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1175 transitions. [2022-12-13 17:26:23,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.0) internal successors, (1175), 5 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:23,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 436.0) internal successors, (2616), 6 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:23,856 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 436.0) internal successors, (2616), 6 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:23,858 INFO L175 Difference]: Start difference. First operand has 78 places, 86 transitions, 193 flow. Second operand 5 states and 1175 transitions. [2022-12-13 17:26:23,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 203 transitions, 808 flow [2022-12-13 17:26:23,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 203 transitions, 796 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-12-13 17:26:23,869 INFO L231 Difference]: Finished difference. Result has 85 places, 95 transitions, 301 flow [2022-12-13 17:26:23,871 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=301, PETRI_PLACES=85, PETRI_TRANSITIONS=95} [2022-12-13 17:26:23,874 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2022-12-13 17:26:23,874 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 95 transitions, 301 flow [2022-12-13 17:26:23,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 198.75) internal successors, (795), 4 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:23,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:26:23,875 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:26:23,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:26:23,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 17:26:23,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:26:23,876 INFO L85 PathProgramCache]: Analyzing trace with hash 433028659, now seen corresponding path program 1 times [2022-12-13 17:26:23,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:26:23,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672984970] [2022-12-13 17:26:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:26:23,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:26:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:26:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:26:23,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:26:23,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672984970] [2022-12-13 17:26:23,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672984970] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:26:23,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:26:23,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:26:23,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599190284] [2022-12-13 17:26:23,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:26:23,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:26:23,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:26:23,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:26:23,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:26:23,982 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 436 [2022-12-13 17:26:23,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 95 transitions, 301 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:23,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:26:23,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 436 [2022-12-13 17:26:23,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:26:28,376 INFO L130 PetriNetUnfolder]: 33982/52951 cut-off events. [2022-12-13 17:26:28,376 INFO L131 PetriNetUnfolder]: For 17410/17893 co-relation queries the response was YES. [2022-12-13 17:26:28,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112186 conditions, 52951 events. 33982/52951 cut-off events. For 17410/17893 co-relation queries the response was YES. Maximal size of possible extension queue 2673. Compared 435599 event pairs, 7099 based on Foata normal form. 1081/47118 useless extension candidates. Maximal degree in co-relation 40147. Up to 40004 conditions per place. [2022-12-13 17:26:28,597 INFO L137 encePairwiseOnDemand]: 429/436 looper letters, 93 selfloop transitions, 4 changer transitions 0/129 dead transitions. [2022-12-13 17:26:28,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 129 transitions, 629 flow [2022-12-13 17:26:28,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:26:28,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:26:28,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 683 transitions. [2022-12-13 17:26:28,599 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.52217125382263 [2022-12-13 17:26:28,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 683 transitions. [2022-12-13 17:26:28,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 683 transitions. [2022-12-13 17:26:28,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:26:28,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 683 transitions. [2022-12-13 17:26:28,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:28,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:28,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 436.0) internal successors, (1744), 4 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:28,603 INFO L175 Difference]: Start difference. First operand has 85 places, 95 transitions, 301 flow. Second operand 3 states and 683 transitions. [2022-12-13 17:26:28,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 129 transitions, 629 flow [2022-12-13 17:26:28,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 129 transitions, 629 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:26:28,612 INFO L231 Difference]: Finished difference. Result has 88 places, 98 transitions, 331 flow [2022-12-13 17:26:28,612 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=436, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=331, PETRI_PLACES=88, PETRI_TRANSITIONS=98} [2022-12-13 17:26:28,613 INFO L288 CegarLoopForPetriNet]: 78 programPoint places, 10 predicate places. [2022-12-13 17:26:28,613 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 98 transitions, 331 flow [2022-12-13 17:26:28,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:28,614 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:26:28,614 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 17:26:28,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:26:28,614 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 17:26:28,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:26:28,614 INFO L85 PathProgramCache]: Analyzing trace with hash -197985776, now seen corresponding path program 1 times [2022-12-13 17:26:28,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:26:28,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865204069] [2022-12-13 17:26:28,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:26:28,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:26:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:26:28,626 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:26:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:26:28,635 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:26:28,636 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:26:28,636 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 17:26:28,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 17:26:28,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 17:26:28,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 17:26:28,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 17:26:28,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:26:28,637 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 17:26:28,637 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:26:28,637 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 17:26:28,682 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:26:28,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 313 transitions, 658 flow [2022-12-13 17:26:28,746 INFO L130 PetriNetUnfolder]: 29/363 cut-off events. [2022-12-13 17:26:28,746 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 17:26:28,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 363 events. 29/363 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1174 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 289. Up to 10 conditions per place. [2022-12-13 17:26:28,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 297 places, 313 transitions, 658 flow [2022-12-13 17:26:28,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 297 places, 313 transitions, 658 flow [2022-12-13 17:26:28,751 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:26:28,752 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 297 places, 313 transitions, 658 flow [2022-12-13 17:26:28,752 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 297 places, 313 transitions, 658 flow [2022-12-13 17:26:28,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 313 transitions, 658 flow [2022-12-13 17:26:28,803 INFO L130 PetriNetUnfolder]: 29/363 cut-off events. [2022-12-13 17:26:28,803 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 17:26:28,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 363 events. 29/363 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1174 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 289. Up to 10 conditions per place. [2022-12-13 17:26:28,822 INFO L119 LiptonReduction]: Number of co-enabled transitions 63920 [2022-12-13 17:26:35,797 INFO L134 LiptonReduction]: Checked pairs total: 133473 [2022-12-13 17:26:35,797 INFO L136 LiptonReduction]: Total number of compositions: 250 [2022-12-13 17:26:35,798 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:26:35,799 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;@43ae69fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:26:35,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 17:26:35,802 INFO L130 PetriNetUnfolder]: 6/47 cut-off events. [2022-12-13 17:26:35,802 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 17:26:35,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:26:35,802 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:26:35,803 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 17:26:35,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:26:35,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1660181122, now seen corresponding path program 1 times [2022-12-13 17:26:35,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:26:35,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462449833] [2022-12-13 17:26:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:26:35,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:26:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:26:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:26:35,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:26:35,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462449833] [2022-12-13 17:26:35,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462449833] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:26:35,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:26:35,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:26:35,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568180845] [2022-12-13 17:26:35,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:26:35,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:26:35,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:26:35,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:26:35,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:26:35,861 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 563 [2022-12-13 17:26:35,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 258 flow. Second operand has 4 states, 4 states have (on average 254.75) internal successors, (1019), 4 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:26:35,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:26:35,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 563 [2022-12-13 17:26:35,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:27:26,377 INFO L130 PetriNetUnfolder]: 484243/682085 cut-off events. [2022-12-13 17:27:26,377 INFO L131 PetriNetUnfolder]: For 40629/40629 co-relation queries the response was YES. [2022-12-13 17:27:27,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1300939 conditions, 682085 events. 484243/682085 cut-off events. For 40629/40629 co-relation queries the response was YES. Maximal size of possible extension queue 20501. Compared 6006705 event pairs, 56891 based on Foata normal form. 7070/558603 useless extension candidates. Maximal degree in co-relation 183608. Up to 301188 conditions per place. [2022-12-13 17:27:30,389 INFO L137 encePairwiseOnDemand]: 544/563 looper letters, 220 selfloop transitions, 19 changer transitions 0/277 dead transitions. [2022-12-13 17:27:30,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 277 transitions, 1122 flow [2022-12-13 17:27:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:27:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 17:27:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1523 transitions. [2022-12-13 17:27:30,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5410301953818828 [2022-12-13 17:27:30,392 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1523 transitions. [2022-12-13 17:27:30,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1523 transitions. [2022-12-13 17:27:30,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:27:30,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1523 transitions. [2022-12-13 17:27:30,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 304.6) internal successors, (1523), 5 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:30,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:30,399 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 563.0) internal successors, (3378), 6 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:30,399 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 258 flow. Second operand 5 states and 1523 transitions. [2022-12-13 17:27:30,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 277 transitions, 1122 flow [2022-12-13 17:27:30,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 277 transitions, 1092 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-12-13 17:27:30,420 INFO L231 Difference]: Finished difference. Result has 109 places, 125 transitions, 390 flow [2022-12-13 17:27:30,420 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=390, PETRI_PLACES=109, PETRI_TRANSITIONS=125} [2022-12-13 17:27:30,420 INFO L288 CegarLoopForPetriNet]: 102 programPoint places, 7 predicate places. [2022-12-13 17:27:30,420 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 125 transitions, 390 flow [2022-12-13 17:27:30,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 254.75) internal successors, (1019), 4 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:30,421 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:27:30,421 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:27:30,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:27:30,421 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 17:27:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:27:30,422 INFO L85 PathProgramCache]: Analyzing trace with hash -765800858, now seen corresponding path program 1 times [2022-12-13 17:27:30,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:27:30,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381341317] [2022-12-13 17:27:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:27:30,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:27:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:27:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:27:30,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:27:30,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381341317] [2022-12-13 17:27:30,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381341317] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:27:30,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:27:30,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:27:30,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008550091] [2022-12-13 17:27:30,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:27:30,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:27:30,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:27:30,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:27:30,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:27:30,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 563 [2022-12-13 17:27:30,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 125 transitions, 390 flow. Second operand has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:27:30,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:27:30,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 563 [2022-12-13 17:27:30,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:28:56,842 INFO L130 PetriNetUnfolder]: 822969/1126681 cut-off events. [2022-12-13 17:28:56,842 INFO L131 PetriNetUnfolder]: For 487995/494121 co-relation queries the response was YES. [2022-12-13 17:28:59,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2492901 conditions, 1126681 events. 822969/1126681 cut-off events. For 487995/494121 co-relation queries the response was YES. Maximal size of possible extension queue 38355. Compared 9697410 event pairs, 161117 based on Foata normal form. 13365/977393 useless extension candidates. Maximal degree in co-relation 1247373. Up to 937579 conditions per place. [2022-12-13 17:29:03,962 INFO L137 encePairwiseOnDemand]: 554/563 looper letters, 137 selfloop transitions, 5 changer transitions 0/177 dead transitions. [2022-12-13 17:29:03,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 177 transitions, 891 flow [2022-12-13 17:29:03,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:29:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:29:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 880 transitions. [2022-12-13 17:29:03,965 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5210183540556542 [2022-12-13 17:29:03,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 880 transitions. [2022-12-13 17:29:03,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 880 transitions. [2022-12-13 17:29:03,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:29:03,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 880 transitions. [2022-12-13 17:29:03,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 293.3333333333333) internal successors, (880), 3 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:03,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:03,972 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 563.0) internal successors, (2252), 4 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:03,972 INFO L175 Difference]: Start difference. First operand has 109 places, 125 transitions, 390 flow. Second operand 3 states and 880 transitions. [2022-12-13 17:29:03,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 177 transitions, 891 flow [2022-12-13 17:29:04,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 177 transitions, 891 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:29:04,108 INFO L231 Difference]: Finished difference. Result has 112 places, 129 transitions, 429 flow [2022-12-13 17:29:04,109 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=429, PETRI_PLACES=112, PETRI_TRANSITIONS=129} [2022-12-13 17:29:04,109 INFO L288 CegarLoopForPetriNet]: 102 programPoint places, 10 predicate places. [2022-12-13 17:29:04,109 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 129 transitions, 429 flow [2022-12-13 17:29:04,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:04,110 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:29:04,110 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:04,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 17:29:04,110 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 17:29:04,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:04,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1783682845, now seen corresponding path program 1 times [2022-12-13 17:29:04,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:04,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443412677] [2022-12-13 17:29:04,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:04,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:04,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:29:04,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:04,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443412677] [2022-12-13 17:29:04,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443412677] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:29:04,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:29:04,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:29:04,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550565502] [2022-12-13 17:29:04,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:29:04,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:29:04,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:04,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:29:04,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:29:04,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 563 [2022-12-13 17:29:04,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 129 transitions, 429 flow. Second operand has 5 states, 5 states have (on average 249.8) internal successors, (1249), 5 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:04,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:29:04,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 563 [2022-12-13 17:29:04,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:31:14,299 INFO L130 PetriNetUnfolder]: 1184689/1616633 cut-off events. [2022-12-13 17:31:14,299 INFO L131 PetriNetUnfolder]: For 714320/723278 co-relation queries the response was YES. [2022-12-13 17:31:19,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3670407 conditions, 1616633 events. 1184689/1616633 cut-off events. For 714320/723278 co-relation queries the response was YES. Maximal size of possible extension queue 51924. Compared 14240535 event pairs, 255831 based on Foata normal form. 4263/1385101 useless extension candidates. Maximal degree in co-relation 2245757. Up to 995297 conditions per place. [2022-12-13 17:31:25,626 INFO L137 encePairwiseOnDemand]: 553/563 looper letters, 296 selfloop transitions, 12 changer transitions 0/342 dead transitions. [2022-12-13 17:31:25,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 342 transitions, 1796 flow [2022-12-13 17:31:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:31:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 17:31:25,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1748 transitions. [2022-12-13 17:31:25,630 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5174659561870929 [2022-12-13 17:31:25,630 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1748 transitions. [2022-12-13 17:31:25,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1748 transitions. [2022-12-13 17:31:25,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:31:25,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1748 transitions. [2022-12-13 17:31:25,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 291.3333333333333) internal successors, (1748), 6 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:25,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 563.0) internal successors, (3941), 7 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:25,638 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 563.0) internal successors, (3941), 7 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:25,638 INFO L175 Difference]: Start difference. First operand has 112 places, 129 transitions, 429 flow. Second operand 6 states and 1748 transitions. [2022-12-13 17:31:25,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 342 transitions, 1796 flow [2022-12-13 17:31:25,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 342 transitions, 1788 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 17:31:25,883 INFO L231 Difference]: Finished difference. Result has 119 places, 136 transitions, 492 flow [2022-12-13 17:31:25,883 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=563, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=492, PETRI_PLACES=119, PETRI_TRANSITIONS=136} [2022-12-13 17:31:25,883 INFO L288 CegarLoopForPetriNet]: 102 programPoint places, 17 predicate places. [2022-12-13 17:31:25,883 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 136 transitions, 492 flow [2022-12-13 17:31:25,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 249.8) internal successors, (1249), 5 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:25,884 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:31:25,884 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:25,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 17:31:25,884 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 17:31:25,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:25,884 INFO L85 PathProgramCache]: Analyzing trace with hash -806665901, now seen corresponding path program 1 times [2022-12-13 17:31:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:25,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107698559] [2022-12-13 17:31:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:25,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:31:25,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:25,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107698559] [2022-12-13 17:31:25,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107698559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:31:25,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:31:25,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:31:25,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290899804] [2022-12-13 17:31:25,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:31:25,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:31:25,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:25,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:31:25,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:31:25,949 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 563 [2022-12-13 17:31:25,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 136 transitions, 492 flow. Second operand has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:31:25,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:31:25,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 563 [2022-12-13 17:31:25,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand