./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a4f44c-9738-4440-83df-29860e26a011/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a4f44c-9738-4440-83df-29860e26a011/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_a4a4f44c-9738-4440-83df-29860e26a011/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a4f44c-9738-4440-83df-29860e26a011/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a4f44c-9738-4440-83df-29860e26a011/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_a4a4f44c-9738-4440-83df-29860e26a011/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 e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b --- 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 17:08:24,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:08:24,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:08:24,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:08:24,236 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:08:24,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:08:24,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:08:24,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:08:24,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:08:24,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:08:24,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:08:24,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:08:24,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:08:24,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:08:24,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:08:24,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:08:24,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:08:24,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:08:24,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:08:24,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:08:24,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:08:24,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:08:24,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:08:24,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:08:24,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:08:24,261 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:08:24,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:08:24,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:08:24,263 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:08:24,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:08:24,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:08:24,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:08:24,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:08:24,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:08:24,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:08:24,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:08:24,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:08:24,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:08:24,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:08:24,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:08:24,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:08:24,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a4f44c-9738-4440-83df-29860e26a011/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:08:24,293 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:08:24,293 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:08:24,293 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:08:24,293 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:08:24,294 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:08:24,294 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:08:24,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:08:24,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:08:24,295 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:08:24,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:08:24,296 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:08:24,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:08:24,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:08:24,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:08:24,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:08:24,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:08:24,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:08:24,297 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:08:24,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:08:24,297 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:08:24,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:08:24,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:08:24,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:08:24,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:08:24,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:08:24,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:08:24,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:08:24,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:08:24,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:08:24,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:08:24,299 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:08:24,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:08:24,300 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:08:24,300 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:08:24,300 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:08:24,300 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_a4a4f44c-9738-4440-83df-29860e26a011/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a4f44c-9738-4440-83df-29860e26a011/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7fe0631e7f950e2868c8cb954edca4f6de3fdffbf6debba58771511fbac2e8b [2022-12-13 17:08:24,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:08:24,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:08:24,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:08:24,511 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:08:24,511 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:08:24,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a4f44c-9738-4440-83df-29860e26a011/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2022-12-13 17:08:27,076 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:08:27,255 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:08:27,256 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a4f44c-9738-4440-83df-29860e26a011/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i [2022-12-13 17:08:27,263 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a4f44c-9738-4440-83df-29860e26a011/bin/uautomizer-uyxdKDjOR8/data/99df87cc2/332dd1f85aa24af792a154a4cf843b6d/FLAGd27bba7ee [2022-12-13 17:08:27,273 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a4f44c-9738-4440-83df-29860e26a011/bin/uautomizer-uyxdKDjOR8/data/99df87cc2/332dd1f85aa24af792a154a4cf843b6d [2022-12-13 17:08:27,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:08:27,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:08:27,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:08:27,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:08:27,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:08:27,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:08:27" (1/1) ... [2022-12-13 17:08:27,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad4df39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:08:27, skipping insertion in model container [2022-12-13 17:08:27,281 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:08:27" (1/1) ... [2022-12-13 17:08:27,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:08:27,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:08:27,536 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_a4a4f44c-9738-4440-83df-29860e26a011/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2022-12-13 17:08:27,542 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:08:27,551 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:08:27,576 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_a4a4f44c-9738-4440-83df-29860e26a011/sv-benchmarks/c/pthread-ext/36_stack_cas_p0_vs_concur.i[30687,30700] [2022-12-13 17:08:27,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:08:27,597 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:08:27,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:08:27 WrapperNode [2022-12-13 17:08:27,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:08:27,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:08:27,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:08:27,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:08:27,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:08:27" (1/1) ... [2022-12-13 17:08:27,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:08:27" (1/1) ... [2022-12-13 17:08:27,628 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 102 [2022-12-13 17:08:27,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:08:27,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:08:27,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:08:27,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:08:27,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:08:27" (1/1) ... [2022-12-13 17:08:27,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:08:27" (1/1) ... [2022-12-13 17:08:27,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:08:27" (1/1) ... [2022-12-13 17:08:27,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:08:27" (1/1) ... [2022-12-13 17:08:27,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:08:27" (1/1) ... [2022-12-13 17:08:27,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:08:27" (1/1) ... [2022-12-13 17:08:27,645 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:08:27" (1/1) ... [2022-12-13 17:08:27,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:08:27" (1/1) ... [2022-12-13 17:08:27,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:08:27,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:08:27,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:08:27,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:08:27,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:08:27" (1/1) ... [2022-12-13 17:08:27,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:08:27,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a4f44c-9738-4440-83df-29860e26a011/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:08:27,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a4f44c-9738-4440-83df-29860e26a011/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:08:27,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a4f44c-9738-4440-83df-29860e26a011/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:08:27,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:08:27,706 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 17:08:27,706 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 17:08:27,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:08:27,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:08:27,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:08:27,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:08:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:08:27,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:08:27,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:08:27,709 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 17:08:27,821 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:08:27,823 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:08:28,004 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:08:28,059 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:08:28,059 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 17:08:28,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:08:28 BoogieIcfgContainer [2022-12-13 17:08:28,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:08:28,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:08:28,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:08:28,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:08:28,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:08:27" (1/3) ... [2022-12-13 17:08:28,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233608ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:08:28, skipping insertion in model container [2022-12-13 17:08:28,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:08:27" (2/3) ... [2022-12-13 17:08:28,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233608ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:08:28, skipping insertion in model container [2022-12-13 17:08:28,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:08:28" (3/3) ... [2022-12-13 17:08:28,067 INFO L112 eAbstractionObserver]: Analyzing ICFG 36_stack_cas_p0_vs_concur.i [2022-12-13 17:08:28,074 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 17:08:28,081 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:08:28,081 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:08:28,081 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:08:28,156 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:08:28,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 97 transitions, 199 flow [2022-12-13 17:08:28,217 INFO L130 PetriNetUnfolder]: 10/108 cut-off events. [2022-12-13 17:08:28,218 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:08:28,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 108 events. 10/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 127 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2022-12-13 17:08:28,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 97 transitions, 199 flow [2022-12-13 17:08:28,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 97 transitions, 199 flow [2022-12-13 17:08:28,229 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:08:28,238 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 97 transitions, 199 flow [2022-12-13 17:08:28,241 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 97 transitions, 199 flow [2022-12-13 17:08:28,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 97 transitions, 199 flow [2022-12-13 17:08:28,268 INFO L130 PetriNetUnfolder]: 10/108 cut-off events. [2022-12-13 17:08:28,268 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:08:28,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 108 events. 10/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 127 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2022-12-13 17:08:28,272 INFO L119 LiptonReduction]: Number of co-enabled transitions 1792 [2022-12-13 17:08:29,552 INFO L134 LiptonReduction]: Checked pairs total: 2169 [2022-12-13 17:08:29,552 INFO L136 LiptonReduction]: Total number of compositions: 86 [2022-12-13 17:08:29,567 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:08:29,573 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;@65f899c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:08:29,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 17:08:29,576 INFO L130 PetriNetUnfolder]: 0/11 cut-off events. [2022-12-13 17:08:29,576 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:08:29,576 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:08:29,577 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 17:08:29,577 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 17:08:29,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:08:29,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1138757601, now seen corresponding path program 1 times [2022-12-13 17:08:29,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:08:29,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757169144] [2022-12-13 17:08:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:08:29,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:08:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:08:29,691 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:08:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:08:29,725 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:08:29,727 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:08:29,728 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-13 17:08:29,730 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-13 17:08:29,730 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-13 17:08:29,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:08:29,731 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-13 17:08:29,734 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:08:29,735 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 17:08:29,768 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:08:29,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 162 transitions, 336 flow [2022-12-13 17:08:29,801 INFO L130 PetriNetUnfolder]: 19/186 cut-off events. [2022-12-13 17:08:29,802 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:08:29,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 186 events. 19/186 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 430 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2022-12-13 17:08:29,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 162 transitions, 336 flow [2022-12-13 17:08:29,805 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 162 transitions, 336 flow [2022-12-13 17:08:29,805 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:08:29,805 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 162 transitions, 336 flow [2022-12-13 17:08:29,805 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 162 transitions, 336 flow [2022-12-13 17:08:29,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 162 transitions, 336 flow [2022-12-13 17:08:29,825 INFO L130 PetriNetUnfolder]: 19/186 cut-off events. [2022-12-13 17:08:29,825 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:08:29,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 186 events. 19/186 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 430 event pairs, 0 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2022-12-13 17:08:29,832 INFO L119 LiptonReduction]: Number of co-enabled transitions 11904 [2022-12-13 17:08:31,292 INFO L134 LiptonReduction]: Checked pairs total: 22993 [2022-12-13 17:08:31,292 INFO L136 LiptonReduction]: Total number of compositions: 129 [2022-12-13 17:08:31,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:08:31,294 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;@65f899c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:08:31,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 17:08:31,297 INFO L130 PetriNetUnfolder]: 2/35 cut-off events. [2022-12-13 17:08:31,297 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:08:31,298 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:08:31,298 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 17:08:31,298 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 17:08:31,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:08:31,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1686273251, now seen corresponding path program 1 times [2022-12-13 17:08:31,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:08:31,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618920208] [2022-12-13 17:08:31,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:08:31,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:08:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:08:31,314 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:08:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:08:31,329 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:08:31,329 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:08:31,329 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 17:08:31,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 17:08:31,329 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 17:08:31,330 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 17:08:31,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:08:31,330 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-13 17:08:31,331 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:08:31,331 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 17:08:31,367 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:08:31,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 227 transitions, 475 flow [2022-12-13 17:08:31,407 INFO L130 PetriNetUnfolder]: 28/264 cut-off events. [2022-12-13 17:08:31,407 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 17:08:31,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 264 events. 28/264 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 817 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2022-12-13 17:08:31,410 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 227 transitions, 475 flow [2022-12-13 17:08:31,412 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 227 transitions, 475 flow [2022-12-13 17:08:31,412 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:08:31,412 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 227 transitions, 475 flow [2022-12-13 17:08:31,412 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 227 transitions, 475 flow [2022-12-13 17:08:31,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 227 transitions, 475 flow [2022-12-13 17:08:31,441 INFO L130 PetriNetUnfolder]: 28/264 cut-off events. [2022-12-13 17:08:31,441 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 17:08:31,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 264 events. 28/264 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 817 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2022-12-13 17:08:31,459 INFO L119 LiptonReduction]: Number of co-enabled transitions 30336 [2022-12-13 17:08:33,282 INFO L134 LiptonReduction]: Checked pairs total: 56054 [2022-12-13 17:08:33,282 INFO L136 LiptonReduction]: Total number of compositions: 182 [2022-12-13 17:08:33,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:08:33,285 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;@65f899c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:08:33,285 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 17:08:33,290 INFO L130 PetriNetUnfolder]: 4/46 cut-off events. [2022-12-13 17:08:33,290 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 17:08:33,290 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:08:33,291 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:08:33,291 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 17:08:33,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:08:33,291 INFO L85 PathProgramCache]: Analyzing trace with hash 913753640, now seen corresponding path program 1 times [2022-12-13 17:08:33,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:08:33,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556266954] [2022-12-13 17:08:33,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:08:33,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:08:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:08:33,372 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 17:08:33,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:08:33,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556266954] [2022-12-13 17:08:33,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556266954] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:08:33,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:08:33,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:08:33,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882031434] [2022-12-13 17:08:33,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:08:33,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 17:08:33,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:08:33,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 17:08:33,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 17:08:33,400 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 409 [2022-12-13 17:08:33,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 79 transitions, 179 flow. Second operand has 2 states, 2 states have (on average 200.5) internal successors, (401), 2 states have internal predecessors, (401), 0 states have call successors, (0), 0 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 17:08:33,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:08:33,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 409 [2022-12-13 17:08:33,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:08:36,300 INFO L130 PetriNetUnfolder]: 24660/34115 cut-off events. [2022-12-13 17:08:36,300 INFO L131 PetriNetUnfolder]: For 1636/1636 co-relation queries the response was YES. [2022-12-13 17:08:36,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68630 conditions, 34115 events. 24660/34115 cut-off events. For 1636/1636 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 203710 event pairs, 19857 based on Foata normal form. 0/29186 useless extension candidates. Maximal degree in co-relation 34935. Up to 33374 conditions per place. [2022-12-13 17:08:36,467 INFO L137 encePairwiseOnDemand]: 401/409 looper letters, 56 selfloop transitions, 0 changer transitions 0/68 dead transitions. [2022-12-13 17:08:36,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 68 transitions, 269 flow [2022-12-13 17:08:36,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 17:08:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 17:08:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 454 transitions. [2022-12-13 17:08:36,477 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5550122249388753 [2022-12-13 17:08:36,478 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 454 transitions. [2022-12-13 17:08:36,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 454 transitions. [2022-12-13 17:08:36,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:08:36,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 454 transitions. [2022-12-13 17:08:36,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 227.0) internal successors, (454), 2 states have internal predecessors, (454), 0 states have call successors, (0), 0 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 17:08:36,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 409.0) internal successors, (1227), 3 states have internal predecessors, (1227), 0 states have call successors, (0), 0 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 17:08:36,489 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 409.0) internal successors, (1227), 3 states have internal predecessors, (1227), 0 states have call successors, (0), 0 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 17:08:36,490 INFO L175 Difference]: Start difference. First operand has 73 places, 79 transitions, 179 flow. Second operand 2 states and 454 transitions. [2022-12-13 17:08:36,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 68 transitions, 269 flow [2022-12-13 17:08:36,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 263 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-12-13 17:08:36,496 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 151 flow [2022-12-13 17:08:36,497 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=151, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2022-12-13 17:08:36,500 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2022-12-13 17:08:36,500 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 151 flow [2022-12-13 17:08:36,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 200.5) internal successors, (401), 2 states have internal predecessors, (401), 0 states have call successors, (0), 0 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 17:08:36,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:08:36,501 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 17:08:36,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:08:36,501 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 17:08:36,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:08:36,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1858010882, now seen corresponding path program 1 times [2022-12-13 17:08:36,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:08:36,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234775947] [2022-12-13 17:08:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:08:36,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:08:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:08:36,514 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:08:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:08:36,526 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:08:36,526 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:08:36,526 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 17:08:36,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 17:08:36,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 17:08:36,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 17:08:36,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 17:08:36,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:08:36,527 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 17:08:36,527 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:08:36,527 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 17:08:36,554 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:08:36,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 292 transitions, 616 flow [2022-12-13 17:08:36,593 INFO L130 PetriNetUnfolder]: 37/342 cut-off events. [2022-12-13 17:08:36,593 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 17:08:36,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 342 events. 37/342 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1216 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 272. Up to 10 conditions per place. [2022-12-13 17:08:36,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 292 transitions, 616 flow [2022-12-13 17:08:36,598 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 292 transitions, 616 flow [2022-12-13 17:08:36,598 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:08:36,598 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 292 transitions, 616 flow [2022-12-13 17:08:36,598 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 292 transitions, 616 flow [2022-12-13 17:08:36,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 292 transitions, 616 flow [2022-12-13 17:08:36,632 INFO L130 PetriNetUnfolder]: 37/342 cut-off events. [2022-12-13 17:08:36,632 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 17:08:36,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 342 events. 37/342 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1216 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 272. Up to 10 conditions per place. [2022-12-13 17:08:36,646 INFO L119 LiptonReduction]: Number of co-enabled transitions 57088 [2022-12-13 17:08:38,688 INFO L134 LiptonReduction]: Checked pairs total: 112559 [2022-12-13 17:08:38,688 INFO L136 LiptonReduction]: Total number of compositions: 233 [2022-12-13 17:08:38,691 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:08:38,692 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;@65f899c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:08:38,692 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 17:08:38,694 INFO L130 PetriNetUnfolder]: 3/37 cut-off events. [2022-12-13 17:08:38,694 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 17:08:38,694 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:08:38,694 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:08:38,694 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 17:08:38,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:08:38,695 INFO L85 PathProgramCache]: Analyzing trace with hash -735975307, now seen corresponding path program 1 times [2022-12-13 17:08:38,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:08:38,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189221192] [2022-12-13 17:08:38,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:08:38,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:08:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:08:38,719 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 17:08:38,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:08:38,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189221192] [2022-12-13 17:08:38,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189221192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:08:38,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:08:38,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:08:38,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070454235] [2022-12-13 17:08:38,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:08:38,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 17:08:38,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:08:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 17:08:38,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 17:08:38,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 525 [2022-12-13 17:08:38,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 254 flow. Second operand has 2 states, 2 states have (on average 255.0) internal successors, (510), 2 states have internal predecessors, (510), 0 states have call successors, (0), 0 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 17:08:38,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:08:38,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 525 [2022-12-13 17:08:38,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:09:28,004 INFO L130 PetriNetUnfolder]: 530443/682077 cut-off events. [2022-12-13 17:09:28,005 INFO L131 PetriNetUnfolder]: For 41176/41176 co-relation queries the response was YES. [2022-12-13 17:09:28,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1372157 conditions, 682077 events. 530443/682077 cut-off events. For 41176/41176 co-relation queries the response was YES. Maximal size of possible extension queue 12159. Compared 4651591 event pairs, 445664 based on Foata normal form. 35726/603585 useless extension candidates. Maximal degree in co-relation 261112. Up to 668941 conditions per place. [2022-12-13 17:09:31,426 INFO L137 encePairwiseOnDemand]: 511/525 looper letters, 72 selfloop transitions, 0 changer transitions 0/91 dead transitions. [2022-12-13 17:09:31,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 358 flow [2022-12-13 17:09:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 17:09:31,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 17:09:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 586 transitions. [2022-12-13 17:09:31,429 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5580952380952381 [2022-12-13 17:09:31,429 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 586 transitions. [2022-12-13 17:09:31,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 586 transitions. [2022-12-13 17:09:31,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:09:31,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 586 transitions. [2022-12-13 17:09:31,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 293.0) internal successors, (586), 2 states have internal predecessors, (586), 0 states have call successors, (0), 0 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 17:09:31,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 525.0) internal successors, (1575), 3 states have internal predecessors, (1575), 0 states have call successors, (0), 0 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 17:09:31,434 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 525.0) internal successors, (1575), 3 states have internal predecessors, (1575), 0 states have call successors, (0), 0 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 17:09:31,434 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 254 flow. Second operand 2 states and 586 transitions. [2022-12-13 17:09:31,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 358 flow [2022-12-13 17:09:31,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 91 transitions, 346 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-12-13 17:09:31,459 INFO L231 Difference]: Finished difference. Result has 91 places, 91 transitions, 202 flow [2022-12-13 17:09:31,459 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=525, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=202, PETRI_PLACES=91, PETRI_TRANSITIONS=91} [2022-12-13 17:09:31,460 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -10 predicate places. [2022-12-13 17:09:31,460 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 91 transitions, 202 flow [2022-12-13 17:09:31,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 255.0) internal successors, (510), 2 states have internal predecessors, (510), 0 states have call successors, (0), 0 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 17:09:31,461 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:09:31,461 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 17:09:31,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:09:31,461 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 17:09:31,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:09:31,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1946218698, now seen corresponding path program 1 times [2022-12-13 17:09:31,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:09:31,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951071481] [2022-12-13 17:09:31,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:09:31,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:09:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:09:31,475 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:09:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:09:31,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:09:31,488 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:09:31,488 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 17:09:31,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-13 17:09:31,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-13 17:09:31,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 17:09:31,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 17:09:31,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 17:09:31,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:09:31,488 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 17:09:31,489 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:09:31,489 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 17:09:31,522 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:09:31,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 357 transitions, 759 flow [2022-12-13 17:09:31,574 INFO L130 PetriNetUnfolder]: 46/420 cut-off events. [2022-12-13 17:09:31,574 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 17:09:31,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 420 events. 46/420 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1628 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 355. Up to 12 conditions per place. [2022-12-13 17:09:31,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 327 places, 357 transitions, 759 flow [2022-12-13 17:09:31,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 327 places, 357 transitions, 759 flow [2022-12-13 17:09:31,580 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:09:31,580 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 327 places, 357 transitions, 759 flow [2022-12-13 17:09:31,580 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 327 places, 357 transitions, 759 flow [2022-12-13 17:09:31,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 327 places, 357 transitions, 759 flow [2022-12-13 17:09:31,629 INFO L130 PetriNetUnfolder]: 46/420 cut-off events. [2022-12-13 17:09:31,629 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 17:09:31,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 420 events. 46/420 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1628 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 355. Up to 12 conditions per place. [2022-12-13 17:09:31,649 INFO L119 LiptonReduction]: Number of co-enabled transitions 92160 [2022-12-13 17:09:33,805 INFO L134 LiptonReduction]: Checked pairs total: 180010 [2022-12-13 17:09:33,805 INFO L136 LiptonReduction]: Total number of compositions: 285 [2022-12-13 17:09:33,806 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:09:33,807 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;@65f899c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:09:33,807 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 17:09:33,809 INFO L130 PetriNetUnfolder]: 2/36 cut-off events. [2022-12-13 17:09:33,809 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 17:09:33,809 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:09:33,809 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:09:33,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:09:33,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:09:33,810 INFO L85 PathProgramCache]: Analyzing trace with hash 252023800, now seen corresponding path program 1 times [2022-12-13 17:09:33,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:09:33,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853160724] [2022-12-13 17:09:33,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:09:33,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:09:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:09:33,827 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 17:09:33,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:09:33,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853160724] [2022-12-13 17:09:33,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853160724] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:09:33,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:09:33,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:09:33,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128193556] [2022-12-13 17:09:33,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:09:33,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 17:09:33,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:09:33,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 17:09:33,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 17:09:33,829 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 642 [2022-12-13 17:09:33,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 134 transitions, 313 flow. Second operand has 2 states, 2 states have (on average 310.0) internal successors, (620), 2 states have internal predecessors, (620), 0 states have call successors, (0), 0 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 17:09:33,830 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:09:33,830 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 642 [2022-12-13 17:09:33,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand