./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:27:40,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:27:40,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:27:40,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:27:40,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:27:40,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:27:40,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:27:40,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:27:40,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:27:40,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:27:40,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:27:40,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:27:40,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:27:40,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:27:40,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:27:40,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:27:40,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:27:40,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:27:40,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:27:40,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:27:40,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:27:40,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:27:40,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:27:40,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:27:40,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:27:40,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:27:40,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:27:40,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:27:40,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:27:40,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:27:40,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:27:40,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:27:40,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:27:40,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:27:40,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:27:40,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:27:40,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:27:40,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:27:40,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:27:40,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:27:40,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:27:40,386 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 09:27:40,430 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:27:40,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:27:40,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:27:40,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:27:40,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:27:40,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:27:40,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:27:40,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:27:40,434 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:27:40,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:27:40,435 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:27:40,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:27:40,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:27:40,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:27:40,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:27:40,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:27:40,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:27:40,437 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:27:40,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:27:40,437 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:27:40,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:27:40,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:27:40,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:27:40,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:27:40,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:40,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:27:40,439 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:27:40,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:27:40,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:27:40,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:27:40,440 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:27:40,441 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:27:40,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:27:40,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ffae79fd42fd88852ffaba2bbbf2601df90fdda2b5dc6bd9b6228e2cf540c7 [2022-11-20 09:27:40,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:27:40,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:27:40,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:27:40,748 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:27:40,748 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:27:40,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2022-11-20 09:27:43,876 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:27:44,201 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:27:44,202 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i [2022-11-20 09:27:44,216 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/bin/uautomizer-ug76WZFUDN/data/84f30aec2/559ffa73612d42c4aad5d2eb95f969d6/FLAG1f5ecfced [2022-11-20 09:27:44,231 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/bin/uautomizer-ug76WZFUDN/data/84f30aec2/559ffa73612d42c4aad5d2eb95f969d6 [2022-11-20 09:27:44,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:27:44,235 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:27:44,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:44,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:27:44,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:27:44,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:44" (1/1) ... [2022-11-20 09:27:44,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bacb9a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:44, skipping insertion in model container [2022-11-20 09:27:44,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:44" (1/1) ... [2022-11-20 09:27:44,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:27:44,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:27:44,473 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-20 09:27:44,693 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_ec90eef7-3764-4f4e-84ea-f0377a237feb/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2022-11-20 09:27:44,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:44,718 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:27:44,732 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-20 09:27:44,750 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_ec90eef7-3764-4f4e-84ea-f0377a237feb/sv-benchmarks/c/pthread-ext/39_rand_lock_p0_vs.i[30959,30972] [2022-11-20 09:27:44,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:44,786 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:27:44,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:44 WrapperNode [2022-11-20 09:27:44,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:44,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:44,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:27:44,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:27:44,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:44" (1/1) ... [2022-11-20 09:27:44,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:44" (1/1) ... [2022-11-20 09:27:44,830 INFO L138 Inliner]: procedures = 176, calls = 21, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 75 [2022-11-20 09:27:44,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:44,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:27:44,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:27:44,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:27:44,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:44" (1/1) ... [2022-11-20 09:27:44,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:44" (1/1) ... [2022-11-20 09:27:44,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:44" (1/1) ... [2022-11-20 09:27:44,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:44" (1/1) ... [2022-11-20 09:27:44,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:44" (1/1) ... [2022-11-20 09:27:44,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:44" (1/1) ... [2022-11-20 09:27:44,855 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:44" (1/1) ... [2022-11-20 09:27:44,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:44" (1/1) ... [2022-11-20 09:27:44,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:27:44,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:27:44,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:27:44,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:27:44,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:44" (1/1) ... [2022-11-20 09:27:44,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:44,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:44,912 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:27:44,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec90eef7-3764-4f4e-84ea-f0377a237feb/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:27:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-20 09:27:44,956 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-20 09:27:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 09:27:44,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 09:27:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:27:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 09:27:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:27:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:27:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 09:27:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:27:44,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:27:44,962 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 09:27:45,089 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:27:45,104 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:27:45,353 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:27:45,430 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:27:45,437 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 09:27:45,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:45 BoogieIcfgContainer [2022-11-20 09:27:45,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:27:45,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:27:45,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:27:45,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:27:45,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:27:44" (1/3) ... [2022-11-20 09:27:45,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43714a88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:45, skipping insertion in model container [2022-11-20 09:27:45,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:44" (2/3) ... [2022-11-20 09:27:45,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43714a88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:45, skipping insertion in model container [2022-11-20 09:27:45,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:45" (3/3) ... [2022-11-20 09:27:45,455 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs.i [2022-11-20 09:27:45,464 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 09:27:45,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:27:45,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 09:27:45,476 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 09:27:45,581 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:45,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 69 transitions, 143 flow [2022-11-20 09:27:45,716 INFO L130 PetriNetUnfolder]: 4/80 cut-off events. [2022-11-20 09:27:45,716 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:45,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 4/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 52. Up to 4 conditions per place. [2022-11-20 09:27:45,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 69 transitions, 143 flow [2022-11-20 09:27:45,730 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 69 transitions, 143 flow [2022-11-20 09:27:45,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:45,760 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;@2c7eebe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:45,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 09:27:45,775 INFO L130 PetriNetUnfolder]: 2/46 cut-off events. [2022-11-20 09:27:45,775 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:45,775 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:45,776 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:45,777 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:45,782 INFO L85 PathProgramCache]: Analyzing trace with hash 816247821, now seen corresponding path program 1 times [2022-11-20 09:27:45,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:45,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169656051] [2022-11-20 09:27:45,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:45,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:45,917 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:27:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:45,962 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:27:45,964 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:27:45,966 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-20 09:27:45,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-20 09:27:45,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-20 09:27:45,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:27:45,970 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-20 09:27:45,976 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:27:45,976 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 09:27:46,043 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:46,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 230 flow [2022-11-20 09:27:46,151 INFO L130 PetriNetUnfolder]: 7/133 cut-off events. [2022-11-20 09:27:46,151 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 09:27:46,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 7/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 207 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2022-11-20 09:27:46,153 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 109 transitions, 230 flow [2022-11-20 09:27:46,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 109 transitions, 230 flow [2022-11-20 09:27:46,156 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:46,161 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;@2c7eebe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:46,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-20 09:27:46,171 INFO L130 PetriNetUnfolder]: 2/47 cut-off events. [2022-11-20 09:27:46,171 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 09:27:46,171 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:46,172 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:46,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 09:27:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:46,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2082202061, now seen corresponding path program 1 times [2022-11-20 09:27:46,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:46,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712200370] [2022-11-20 09:27:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:46,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:46,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:46,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712200370] [2022-11-20 09:27:46,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712200370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:46,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:46,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:46,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883560472] [2022-11-20 09:27:46,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:46,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:46,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:46,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:46,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:46,464 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 109 [2022-11-20 09:27:46,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 109 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:46,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:46,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 109 [2022-11-20 09:27:46,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:46,612 INFO L130 PetriNetUnfolder]: 39/353 cut-off events. [2022-11-20 09:27:46,612 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-20 09:27:46,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 353 events. 39/353 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1442 event pairs, 16 based on Foata normal form. 57/394 useless extension candidates. Maximal degree in co-relation 282. Up to 47 conditions per place. [2022-11-20 09:27:46,618 INFO L137 encePairwiseOnDemand]: 100/109 looper letters, 21 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2022-11-20 09:27:46,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 109 transitions, 283 flow [2022-11-20 09:27:46,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2022-11-20 09:27:46,644 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9296636085626911 [2022-11-20 09:27:46,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2022-11-20 09:27:46,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2022-11-20 09:27:46,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:46,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2022-11-20 09:27:46,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:46,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:46,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:46,676 INFO L175 Difference]: Start difference. First operand has 109 places, 109 transitions, 230 flow. Second operand 3 states and 304 transitions. [2022-11-20 09:27:46,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 109 transitions, 283 flow [2022-11-20 09:27:46,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 109 transitions, 281 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:46,684 INFO L231 Difference]: Finished difference. Result has 106 places, 102 transitions, 231 flow [2022-11-20 09:27:46,686 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2022-11-20 09:27:46,691 INFO L288 CegarLoopForPetriNet]: 109 programPoint places, -3 predicate places. [2022-11-20 09:27:46,691 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 231 flow [2022-11-20 09:27:46,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:46,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:46,693 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:46,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 09:27:46,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 09:27:46,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:46,695 INFO L85 PathProgramCache]: Analyzing trace with hash 422513511, now seen corresponding path program 1 times [2022-11-20 09:27:46,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:46,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138363501] [2022-11-20 09:27:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:46,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:46,756 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:27:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:46,789 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:27:46,793 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:27:46,793 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-20 09:27:46,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-20 09:27:46,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-20 09:27:46,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-20 09:27:46,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 09:27:46,794 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-20 09:27:46,795 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:27:46,795 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 09:27:46,864 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:46,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 149 transitions, 319 flow [2022-11-20 09:27:46,924 INFO L130 PetriNetUnfolder]: 10/186 cut-off events. [2022-11-20 09:27:46,924 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 09:27:46,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 186 events. 10/186 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 424 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2022-11-20 09:27:46,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 149 transitions, 319 flow [2022-11-20 09:27:46,932 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 149 transitions, 319 flow [2022-11-20 09:27:46,934 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:46,940 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;@2c7eebe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:46,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 09:27:46,953 INFO L130 PetriNetUnfolder]: 2/47 cut-off events. [2022-11-20 09:27:46,953 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 09:27:46,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:46,953 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:46,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 09:27:46,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:46,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1114269772, now seen corresponding path program 1 times [2022-11-20 09:27:46,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:46,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540278004] [2022-11-20 09:27:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:46,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:47,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:47,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540278004] [2022-11-20 09:27:47,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540278004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:47,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:47,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:47,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468894459] [2022-11-20 09:27:47,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:47,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:47,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:47,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:47,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:47,086 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 149 [2022-11-20 09:27:47,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 149 transitions, 319 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:47,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:47,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 149 [2022-11-20 09:27:47,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:47,648 INFO L130 PetriNetUnfolder]: 522/2424 cut-off events. [2022-11-20 09:27:47,649 INFO L131 PetriNetUnfolder]: For 277/277 co-relation queries the response was YES. [2022-11-20 09:27:47,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3445 conditions, 2424 events. 522/2424 cut-off events. For 277/277 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 20269 event pairs, 199 based on Foata normal form. 444/2724 useless extension candidates. Maximal degree in co-relation 961. Up to 626 conditions per place. [2022-11-20 09:27:47,678 INFO L137 encePairwiseOnDemand]: 137/149 looper letters, 32 selfloop transitions, 4 changer transitions 0/153 dead transitions. [2022-11-20 09:27:47,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 153 transitions, 411 flow [2022-11-20 09:27:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2022-11-20 09:27:47,685 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9284116331096197 [2022-11-20 09:27:47,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2022-11-20 09:27:47,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2022-11-20 09:27:47,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:47,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2022-11-20 09:27:47,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:47,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:47,691 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:47,691 INFO L175 Difference]: Start difference. First operand has 149 places, 149 transitions, 319 flow. Second operand 3 states and 415 transitions. [2022-11-20 09:27:47,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 153 transitions, 411 flow [2022-11-20 09:27:47,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 153 transitions, 403 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:47,699 INFO L231 Difference]: Finished difference. Result has 146 places, 142 transitions, 323 flow [2022-11-20 09:27:47,699 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=323, PETRI_PLACES=146, PETRI_TRANSITIONS=142} [2022-11-20 09:27:47,701 INFO L288 CegarLoopForPetriNet]: 149 programPoint places, -3 predicate places. [2022-11-20 09:27:47,701 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 142 transitions, 323 flow [2022-11-20 09:27:47,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:47,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:47,702 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:47,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 09:27:47,703 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)] === [2022-11-20 09:27:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:47,703 INFO L85 PathProgramCache]: Analyzing trace with hash -122206706, now seen corresponding path program 1 times [2022-11-20 09:27:47,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:47,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939194263] [2022-11-20 09:27:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:47,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:47,748 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:27:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:47,786 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:27:47,786 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:27:47,786 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-20 09:27:47,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-20 09:27:47,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-20 09:27:47,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-20 09:27:47,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-20 09:27:47,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 09:27:47,787 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-20 09:27:47,788 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:27:47,788 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 09:27:47,837 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:47,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 189 transitions, 410 flow [2022-11-20 09:27:47,880 INFO L130 PetriNetUnfolder]: 13/239 cut-off events. [2022-11-20 09:27:47,880 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 09:27:47,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 239 events. 13/239 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 664 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 194. Up to 10 conditions per place. [2022-11-20 09:27:47,884 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 189 transitions, 410 flow [2022-11-20 09:27:47,886 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 189 transitions, 410 flow [2022-11-20 09:27:47,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:47,888 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;@2c7eebe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:47,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 09:27:47,893 INFO L130 PetriNetUnfolder]: 2/47 cut-off events. [2022-11-20 09:27:47,893 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 09:27:47,893 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:47,893 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:47,894 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 09:27:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:47,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1298163941, now seen corresponding path program 1 times [2022-11-20 09:27:47,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:47,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768911413] [2022-11-20 09:27:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:47,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:47,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:47,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768911413] [2022-11-20 09:27:47,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768911413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:47,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:47,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:47,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932949327] [2022-11-20 09:27:47,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:47,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:47,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:47,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:47,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:47,948 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 189 [2022-11-20 09:27:47,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 189 transitions, 410 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:47,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:47,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 189 [2022-11-20 09:27:47,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:51,659 INFO L130 PetriNetUnfolder]: 5634/18366 cut-off events. [2022-11-20 09:27:51,660 INFO L131 PetriNetUnfolder]: For 3211/3211 co-relation queries the response was YES. [2022-11-20 09:27:51,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27906 conditions, 18366 events. 5634/18366 cut-off events. For 3211/3211 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 214544 event pairs, 1983 based on Foata normal form. 3541/20652 useless extension candidates. Maximal degree in co-relation 3527. Up to 6832 conditions per place. [2022-11-20 09:27:52,016 INFO L137 encePairwiseOnDemand]: 174/189 looper letters, 43 selfloop transitions, 5 changer transitions 0/197 dead transitions. [2022-11-20 09:27:52,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 197 transitions, 543 flow [2022-11-20 09:27:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2022-11-20 09:27:52,018 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.927689594356261 [2022-11-20 09:27:52,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2022-11-20 09:27:52,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2022-11-20 09:27:52,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:52,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2022-11-20 09:27:52,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:52,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:52,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:52,023 INFO L175 Difference]: Start difference. First operand has 189 places, 189 transitions, 410 flow. Second operand 3 states and 526 transitions. [2022-11-20 09:27:52,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 197 transitions, 543 flow [2022-11-20 09:27:52,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 197 transitions, 525 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:52,031 INFO L231 Difference]: Finished difference. Result has 186 places, 182 transitions, 415 flow [2022-11-20 09:27:52,032 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=415, PETRI_PLACES=186, PETRI_TRANSITIONS=182} [2022-11-20 09:27:52,032 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -3 predicate places. [2022-11-20 09:27:52,033 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 182 transitions, 415 flow [2022-11-20 09:27:52,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:52,033 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:52,033 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:52,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 09:27:52,034 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)] === [2022-11-20 09:27:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:52,035 INFO L85 PathProgramCache]: Analyzing trace with hash -695953964, now seen corresponding path program 1 times [2022-11-20 09:27:52,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:52,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901825792] [2022-11-20 09:27:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:52,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:52,057 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:27:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:52,076 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:27:52,076 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:27:52,077 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-20 09:27:52,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-20 09:27:52,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-20 09:27:52,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-20 09:27:52,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-20 09:27:52,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-20 09:27:52,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 09:27:52,078 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-20 09:27:52,079 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:27:52,079 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-20 09:27:52,126 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:52,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 229 places, 229 transitions, 503 flow [2022-11-20 09:27:52,213 INFO L130 PetriNetUnfolder]: 16/292 cut-off events. [2022-11-20 09:27:52,213 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 09:27:52,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 292 events. 16/292 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 898 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 252. Up to 12 conditions per place. [2022-11-20 09:27:52,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 229 places, 229 transitions, 503 flow [2022-11-20 09:27:52,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 229 places, 229 transitions, 503 flow [2022-11-20 09:27:52,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:52,224 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;@2c7eebe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:52,224 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-20 09:27:52,230 INFO L130 PetriNetUnfolder]: 2/47 cut-off events. [2022-11-20 09:27:52,230 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 09:27:52,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:52,231 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:52,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 09:27:52,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:52,231 INFO L85 PathProgramCache]: Analyzing trace with hash -439839358, now seen corresponding path program 1 times [2022-11-20 09:27:52,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:52,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746989677] [2022-11-20 09:27:52,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:52,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:52,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:52,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746989677] [2022-11-20 09:27:52,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746989677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:52,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:52,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:52,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603601933] [2022-11-20 09:27:52,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:52,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:52,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:52,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:52,287 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 229 [2022-11-20 09:27:52,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 229 transitions, 503 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:52,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:52,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 229 [2022-11-20 09:27:52,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:16,207 INFO L130 PetriNetUnfolder]: 54911/141131 cut-off events. [2022-11-20 09:28:16,207 INFO L131 PetriNetUnfolder]: For 34419/34419 co-relation queries the response was YES. [2022-11-20 09:28:17,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226763 conditions, 141131 events. 54911/141131 cut-off events. For 34419/34419 co-relation queries the response was YES. Maximal size of possible extension queue 5875. Compared 1959916 event pairs, 18702 based on Foata normal form. 28152/158177 useless extension candidates. Maximal degree in co-relation 28237. Up to 66293 conditions per place. [2022-11-20 09:28:19,014 INFO L137 encePairwiseOnDemand]: 211/229 looper letters, 54 selfloop transitions, 6 changer transitions 0/241 dead transitions. [2022-11-20 09:28:19,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 241 transitions, 679 flow [2022-11-20 09:28:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:28:19,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:28:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2022-11-20 09:28:19,020 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9272197962154294 [2022-11-20 09:28:19,020 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2022-11-20 09:28:19,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2022-11-20 09:28:19,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:19,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2022-11-20 09:28:19,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:19,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:19,029 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:19,030 INFO L175 Difference]: Start difference. First operand has 229 places, 229 transitions, 503 flow. Second operand 3 states and 637 transitions. [2022-11-20 09:28:19,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 241 transitions, 679 flow [2022-11-20 09:28:19,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 241 transitions, 647 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:19,060 INFO L231 Difference]: Finished difference. Result has 226 places, 222 transitions, 507 flow [2022-11-20 09:28:19,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=507, PETRI_PLACES=226, PETRI_TRANSITIONS=222} [2022-11-20 09:28:19,063 INFO L288 CegarLoopForPetriNet]: 229 programPoint places, -3 predicate places. [2022-11-20 09:28:19,064 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 222 transitions, 507 flow [2022-11-20 09:28:19,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:19,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:19,065 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:19,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 09:28:19,065 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 09:28:19,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:19,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1004108369, now seen corresponding path program 1 times [2022-11-20 09:28:19,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:19,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62792638] [2022-11-20 09:28:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:19,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:19,095 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:28:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:19,132 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:28:19,133 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:28:19,133 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-20 09:28:19,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-20 09:28:19,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-11-20 09:28:19,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-20 09:28:19,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-20 09:28:19,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-20 09:28:19,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-20 09:28:19,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 09:28:19,135 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-20 09:28:19,136 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:28:19,136 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-20 09:28:19,193 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:28:19,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 269 transitions, 598 flow [2022-11-20 09:28:19,265 INFO L130 PetriNetUnfolder]: 19/345 cut-off events. [2022-11-20 09:28:19,265 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-20 09:28:19,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 345 events. 19/345 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1149 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 311. Up to 14 conditions per place. [2022-11-20 09:28:19,271 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 269 transitions, 598 flow [2022-11-20 09:28:19,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 269 transitions, 598 flow [2022-11-20 09:28:19,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:28:19,279 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;@2c7eebe7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:28:19,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-20 09:28:19,283 INFO L130 PetriNetUnfolder]: 2/47 cut-off events. [2022-11-20 09:28:19,283 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 09:28:19,283 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:19,283 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:19,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-20 09:28:19,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:19,284 INFO L85 PathProgramCache]: Analyzing trace with hash -863904407, now seen corresponding path program 1 times [2022-11-20 09:28:19,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:19,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466213799] [2022-11-20 09:28:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:19,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:19,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:19,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466213799] [2022-11-20 09:28:19,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466213799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:19,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:19,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:19,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318751329] [2022-11-20 09:28:19,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:19,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:28:19,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:19,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:28:19,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:19,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 269 [2022-11-20 09:28:19,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 269 transitions, 598 flow. Second operand has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:19,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:19,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 269 [2022-11-20 09:28:19,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand