./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP --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 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:25:41,429 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:25:41,534 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:25:41,547 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:25:41,548 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:25:41,578 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:25:41,579 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:25:41,580 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:25:41,581 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:25:41,581 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:25:41,582 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:25:41,583 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:25:41,584 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:25:41,584 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:25:41,585 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:25:41,585 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:25:41,586 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:25:41,587 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:25:41,587 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:25:41,588 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:25:41,588 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:25:41,589 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:25:41,590 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:25:41,590 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:25:41,591 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:25:41,591 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:25:41,592 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:25:41,592 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:25:41,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:25:41,593 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:25:41,594 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:25:41,594 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:25:41,594 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:25:41,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:25:41,595 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:25:41,596 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:25:41,596 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:25:41,597 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:25:41,597 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:25:41,597 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f [2023-11-06 22:25:41,867 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:25:41,891 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:25:41,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:25:41,895 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:25:41,896 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:25:41,897 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i [2023-11-06 22:25:45,036 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:25:45,305 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:25:45,305 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i [2023-11-06 22:25:45,322 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/data/6c61fa7b4/87fea0cabc80495196b44615dcb913c5/FLAG5674d04e2 [2023-11-06 22:25:45,337 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/data/6c61fa7b4/87fea0cabc80495196b44615dcb913c5 [2023-11-06 22:25:45,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:25:45,341 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:25:45,343 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:25:45,343 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:25:45,349 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:25:45,349 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:45,351 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28843f67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45, skipping insertion in model container [2023-11-06 22:25:45,351 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:45,410 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:25:45,795 WARN L240 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_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2023-11-06 22:25:45,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:25:45,837 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:25:45,871 WARN L240 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_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2023-11-06 22:25:45,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:25:45,919 WARN L672 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:25:45,927 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:25:45,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45 WrapperNode [2023-11-06 22:25:45,928 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:25:45,929 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:25:45,929 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:25:45,930 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:25:45,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:45,953 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:45,981 INFO L138 Inliner]: procedures = 173, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 137 [2023-11-06 22:25:45,982 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:25:45,983 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:25:45,983 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:25:45,983 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:25:45,993 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:45,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:45,997 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:45,997 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:46,005 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:46,010 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:46,012 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:46,014 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:46,018 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:25:46,019 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:25:46,019 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:25:46,019 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:25:46,020 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:46,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:25:46,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:46,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:25:46,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:25:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:25:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:25:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 22:25:46,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:25:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:25:46,098 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-06 22:25:46,099 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-06 22:25:46,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:25:46,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:25:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:25:46,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:25:46,103 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:25:46,288 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:25:46,291 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:25:46,583 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:25:46,593 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:25:46,593 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-06 22:25:46,595 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:25:46 BoogieIcfgContainer [2023-11-06 22:25:46,596 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:25:46,599 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:25:46,599 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:25:46,603 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:25:46,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:25:45" (1/3) ... [2023-11-06 22:25:46,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15522df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:25:46, skipping insertion in model container [2023-11-06 22:25:46,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (2/3) ... [2023-11-06 22:25:46,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15522df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:25:46, skipping insertion in model container [2023-11-06 22:25:46,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:25:46" (3/3) ... [2023-11-06 22:25:46,606 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_20-callback_racefree.i [2023-11-06 22:25:46,616 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:25:46,628 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:25:46,628 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:25:46,629 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:25:46,691 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-06 22:25:46,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 148 transitions, 303 flow [2023-11-06 22:25:46,830 INFO L124 PetriNetUnfolderBase]: 26/227 cut-off events. [2023-11-06 22:25:46,830 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:25:46,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 227 events. 26/227 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 619 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2023-11-06 22:25:46,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 148 transitions, 303 flow [2023-11-06 22:25:46,847 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 143 transitions, 290 flow [2023-11-06 22:25:46,851 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:25:46,864 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 143 transitions, 290 flow [2023-11-06 22:25:46,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 143 transitions, 290 flow [2023-11-06 22:25:46,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 143 transitions, 290 flow [2023-11-06 22:25:46,978 INFO L124 PetriNetUnfolderBase]: 25/222 cut-off events. [2023-11-06 22:25:46,979 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:46,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 222 events. 25/222 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 569 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2023-11-06 22:25:46,988 INFO L119 LiptonReduction]: Number of co-enabled transitions 3740 [2023-11-06 22:25:51,286 INFO L134 LiptonReduction]: Checked pairs total: 5479 [2023-11-06 22:25:51,286 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-11-06 22:25:51,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:51,315 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;@a615054, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:51,316 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:25:51,322 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:25:51,322 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-06 22:25:51,322 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:51,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:51,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:25:51,325 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:25:51,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:51,333 INFO L85 PathProgramCache]: Analyzing trace with hash -848355184, now seen corresponding path program 1 times [2023-11-06 22:25:51,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:51,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647824805] [2023-11-06 22:25:51,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:51,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:51,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:51,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647824805] [2023-11-06 22:25:51,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647824805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:51,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:51,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:25:51,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957057460] [2023-11-06 22:25:51,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:51,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:51,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:51,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:51,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:51,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 284 [2023-11-06 22:25:51,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 32 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 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) [2023-11-06 22:25:51,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:51,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 284 [2023-11-06 22:25:51,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:51,964 INFO L124 PetriNetUnfolderBase]: 98/232 cut-off events. [2023-11-06 22:25:51,964 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:25:51,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 232 events. 98/232 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 846 event pairs, 32 based on Foata normal form. 29/219 useless extension candidates. Maximal degree in co-relation 406. Up to 116 conditions per place. [2023-11-06 22:25:51,971 INFO L140 encePairwiseOnDemand]: 270/284 looper letters, 23 selfloop transitions, 2 changer transitions 9/37 dead transitions. [2023-11-06 22:25:51,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 37 transitions, 146 flow [2023-11-06 22:25:51,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:51,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-11-06 22:25:52,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5199530516431925 [2023-11-06 22:25:52,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-11-06 22:25:52,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-11-06 22:25:52,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:52,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-11-06 22:25:52,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 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) [2023-11-06 22:25:52,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 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) [2023-11-06 22:25:52,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 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) [2023-11-06 22:25:52,027 INFO L175 Difference]: Start difference. First operand has 25 places, 32 transitions, 68 flow. Second operand 3 states and 443 transitions. [2023-11-06 22:25:52,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 37 transitions, 146 flow [2023-11-06 22:25:52,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 37 transitions, 146 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:25:52,034 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 68 flow [2023-11-06 22:25:52,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-11-06 22:25:52,043 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-06 22:25:52,043 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 68 flow [2023-11-06 22:25:52,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 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) [2023-11-06 22:25:52,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:52,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:25:52,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:25:52,046 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:25:52,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:52,048 INFO L85 PathProgramCache]: Analyzing trace with hash -848331092, now seen corresponding path program 1 times [2023-11-06 22:25:52,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:52,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062708923] [2023-11-06 22:25:52,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:52,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:52,125 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:25:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:52,162 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:25:52,162 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:25:52,164 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-06 22:25:52,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-06 22:25:52,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-06 22:25:52,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:25:52,168 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:25:52,171 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:25:52,171 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:25:52,207 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:25:52,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 172 transitions, 360 flow [2023-11-06 22:25:52,275 INFO L124 PetriNetUnfolderBase]: 43/356 cut-off events. [2023-11-06 22:25:52,275 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:25:52,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 356 events. 43/356 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1272 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 229. Up to 9 conditions per place. [2023-11-06 22:25:52,278 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 172 transitions, 360 flow [2023-11-06 22:25:52,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 172 transitions, 360 flow [2023-11-06 22:25:52,282 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:25:52,282 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 172 transitions, 360 flow [2023-11-06 22:25:52,283 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 172 transitions, 360 flow [2023-11-06 22:25:52,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 172 transitions, 360 flow [2023-11-06 22:25:52,330 INFO L124 PetriNetUnfolderBase]: 43/356 cut-off events. [2023-11-06 22:25:52,331 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:25:52,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 356 events. 43/356 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1272 event pairs, 0 based on Foata normal form. 0/307 useless extension candidates. Maximal degree in co-relation 229. Up to 9 conditions per place. [2023-11-06 22:25:52,343 INFO L119 LiptonReduction]: Number of co-enabled transitions 8932 [2023-11-06 22:25:56,653 INFO L134 LiptonReduction]: Checked pairs total: 14989 [2023-11-06 22:25:56,653 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-11-06 22:25:56,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:56,657 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;@a615054, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:56,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:25:56,661 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:25:56,662 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-11-06 22:25:56,662 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:25:56,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:56,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:25:56,663 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:25:56,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:56,664 INFO L85 PathProgramCache]: Analyzing trace with hash 947615668, now seen corresponding path program 1 times [2023-11-06 22:25:56,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:56,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319408541] [2023-11-06 22:25:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:56,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:56,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:56,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319408541] [2023-11-06 22:25:56,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319408541] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:56,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:56,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:25:56,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936736867] [2023-11-06 22:25:56,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:56,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:56,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:56,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:56,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:56,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 327 [2023-11-06 22:25:56,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 47 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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) [2023-11-06 22:25:56,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:25:56,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 327 [2023-11-06 22:25:56,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:25:57,209 INFO L124 PetriNetUnfolderBase]: 2025/3419 cut-off events. [2023-11-06 22:25:57,209 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2023-11-06 22:25:57,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6804 conditions, 3419 events. 2025/3419 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 18045 event pairs, 856 based on Foata normal form. 106/2977 useless extension candidates. Maximal degree in co-relation 2502. Up to 1665 conditions per place. [2023-11-06 22:25:57,231 INFO L140 encePairwiseOnDemand]: 310/327 looper letters, 53 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2023-11-06 22:25:57,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 62 transitions, 262 flow [2023-11-06 22:25:57,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:57,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:25:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2023-11-06 22:25:57,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341488277268094 [2023-11-06 22:25:57,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2023-11-06 22:25:57,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2023-11-06 22:25:57,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:25:57,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2023-11-06 22:25:57,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 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) [2023-11-06 22:25:57,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2023-11-06 22:25:57,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 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) [2023-11-06 22:25:57,243 INFO L175 Difference]: Start difference. First operand has 38 places, 47 transitions, 110 flow. Second operand 3 states and 524 transitions. [2023-11-06 22:25:57,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 62 transitions, 262 flow [2023-11-06 22:25:57,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 62 transitions, 262 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:25:57,250 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 130 flow [2023-11-06 22:25:57,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-11-06 22:25:57,252 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-11-06 22:25:57,252 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 130 flow [2023-11-06 22:25:57,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 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) [2023-11-06 22:25:57,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:25:57,253 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:25:57,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:25:57,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:25:57,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:57,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1457101396, now seen corresponding path program 1 times [2023-11-06 22:25:57,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:57,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708301046] [2023-11-06 22:25:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:57,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:57,301 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:25:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:25:57,348 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:25:57,348 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:25:57,349 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-06 22:25:57,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-06 22:25:57,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-06 22:25:57,349 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-06 22:25:57,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:25:57,349 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:25:57,350 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:25:57,350 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:25:57,376 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 22:25:57,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 196 transitions, 419 flow [2023-11-06 22:25:57,481 INFO L124 PetriNetUnfolderBase]: 65/520 cut-off events. [2023-11-06 22:25:57,482 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:25:57,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 520 events. 65/520 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2109 event pairs, 1 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 364. Up to 16 conditions per place. [2023-11-06 22:25:57,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 196 transitions, 419 flow [2023-11-06 22:25:57,491 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 196 transitions, 419 flow [2023-11-06 22:25:57,491 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:25:57,491 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 196 transitions, 419 flow [2023-11-06 22:25:57,492 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 196 transitions, 419 flow [2023-11-06 22:25:57,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 196 transitions, 419 flow [2023-11-06 22:25:57,565 INFO L124 PetriNetUnfolderBase]: 65/520 cut-off events. [2023-11-06 22:25:57,565 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-06 22:25:57,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 520 events. 65/520 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2109 event pairs, 1 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 364. Up to 16 conditions per place. [2023-11-06 22:25:57,589 INFO L119 LiptonReduction]: Number of co-enabled transitions 15048 [2023-11-06 22:26:01,879 INFO L134 LiptonReduction]: Checked pairs total: 25856 [2023-11-06 22:26:01,880 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-11-06 22:26:01,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:26:01,884 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;@a615054, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:26:01,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 22:26:01,887 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:26:01,888 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-06 22:26:01,888 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:26:01,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:01,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:26:01,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:26:01,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:01,889 INFO L85 PathProgramCache]: Analyzing trace with hash -197966183, now seen corresponding path program 1 times [2023-11-06 22:26:01,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:01,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727754560] [2023-11-06 22:26:01,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:01,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:01,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:01,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727754560] [2023-11-06 22:26:01,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727754560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:01,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:01,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:26:01,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786208941] [2023-11-06 22:26:01,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:01,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:01,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:01,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:01,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:02,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 373 [2023-11-06 22:26:02,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 58 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 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) [2023-11-06 22:26:02,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:02,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 373 [2023-11-06 22:26:02,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:04,977 INFO L124 PetriNetUnfolderBase]: 15781/23479 cut-off events. [2023-11-06 22:26:04,977 INFO L125 PetriNetUnfolderBase]: For 683/683 co-relation queries the response was YES. [2023-11-06 22:26:05,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46804 conditions, 23479 events. 15781/23479 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 151413 event pairs, 7226 based on Foata normal form. 2702/22583 useless extension candidates. Maximal degree in co-relation 5992. Up to 11852 conditions per place. [2023-11-06 22:26:05,137 INFO L140 encePairwiseOnDemand]: 352/373 looper letters, 63 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-11-06 22:26:05,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 320 flow [2023-11-06 22:26:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:05,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:05,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 595 transitions. [2023-11-06 22:26:05,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317247542448614 [2023-11-06 22:26:05,144 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 595 transitions. [2023-11-06 22:26:05,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 595 transitions. [2023-11-06 22:26:05,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:05,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 595 transitions. [2023-11-06 22:26:05,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 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) [2023-11-06 22:26:05,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 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) [2023-11-06 22:26:05,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 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) [2023-11-06 22:26:05,157 INFO L175 Difference]: Start difference. First operand has 47 places, 58 transitions, 143 flow. Second operand 3 states and 595 transitions. [2023-11-06 22:26:05,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 320 flow [2023-11-06 22:26:05,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:26:05,165 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 159 flow [2023-11-06 22:26:05,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2023-11-06 22:26:05,168 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-11-06 22:26:05,168 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 159 flow [2023-11-06 22:26:05,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 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) [2023-11-06 22:26:05,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:05,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:05,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:26:05,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:26:05,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:05,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1852393998, now seen corresponding path program 1 times [2023-11-06 22:26:05,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:05,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190139005] [2023-11-06 22:26:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:05,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:05,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:05,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190139005] [2023-11-06 22:26:05,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190139005] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:05,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4258213] [2023-11-06 22:26:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:05,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:05,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:05,334 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:05,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:26:05,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:05,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:26:05,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:05,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:05,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4258213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:05,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:05,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:26:05,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665166393] [2023-11-06 22:26:05,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:05,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:26:05,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:05,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:26:05,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:26:05,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 373 [2023-11-06 22:26:05,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 159 flow. Second operand has 7 states, 7 states have (on average 164.71428571428572) internal successors, (1153), 7 states have internal predecessors, (1153), 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) [2023-11-06 22:26:05,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:05,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 373 [2023-11-06 22:26:05,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:05,884 INFO L124 PetriNetUnfolderBase]: 1078/1807 cut-off events. [2023-11-06 22:26:05,885 INFO L125 PetriNetUnfolderBase]: For 680/680 co-relation queries the response was YES. [2023-11-06 22:26:05,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3733 conditions, 1807 events. 1078/1807 cut-off events. For 680/680 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9440 event pairs, 0 based on Foata normal form. 0/1806 useless extension candidates. Maximal degree in co-relation 3722. Up to 1030 conditions per place. [2023-11-06 22:26:05,899 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 45 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-11-06 22:26:05,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 53 transitions, 236 flow [2023-11-06 22:26:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:26:05,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:26:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1025 transitions. [2023-11-06 22:26:05,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4579982126899017 [2023-11-06 22:26:05,915 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1025 transitions. [2023-11-06 22:26:05,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1025 transitions. [2023-11-06 22:26:05,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:05,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1025 transitions. [2023-11-06 22:26:05,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 170.83333333333334) internal successors, (1025), 6 states have internal predecessors, (1025), 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) [2023-11-06 22:26:05,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 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) [2023-11-06 22:26:05,937 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 373.0) internal successors, (2611), 7 states have internal predecessors, (2611), 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) [2023-11-06 22:26:05,937 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 159 flow. Second operand 6 states and 1025 transitions. [2023-11-06 22:26:05,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 53 transitions, 236 flow [2023-11-06 22:26:05,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 53 transitions, 232 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-06 22:26:05,943 INFO L231 Difference]: Finished difference. Result has 37 places, 25 transitions, 80 flow [2023-11-06 22:26:05,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=80, PETRI_PLACES=37, PETRI_TRANSITIONS=25} [2023-11-06 22:26:05,945 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -10 predicate places. [2023-11-06 22:26:05,945 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 25 transitions, 80 flow [2023-11-06 22:26:05,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 164.71428571428572) internal successors, (1153), 7 states have internal predecessors, (1153), 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) [2023-11-06 22:26:05,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:05,947 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 22:26:05,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:06,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:06,155 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:26:06,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:06,156 INFO L85 PathProgramCache]: Analyzing trace with hash -868615552, now seen corresponding path program 1 times [2023-11-06 22:26:06,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:06,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960842627] [2023-11-06 22:26:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:06,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:26:06,183 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:26:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:26:06,231 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:26:06,232 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:26:06,233 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-06 22:26:06,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-06 22:26:06,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-06 22:26:06,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-06 22:26:06,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-06 22:26:06,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:26:06,235 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 22:26:06,236 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:26:06,236 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-06 22:26:06,278 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 22:26:06,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 220 transitions, 480 flow [2023-11-06 22:26:06,483 INFO L124 PetriNetUnfolderBase]: 99/756 cut-off events. [2023-11-06 22:26:06,483 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 22:26:06,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 756 events. 99/756 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3366 event pairs, 6 based on Foata normal form. 0/653 useless extension candidates. Maximal degree in co-relation 540. Up to 32 conditions per place. [2023-11-06 22:26:06,493 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 220 transitions, 480 flow [2023-11-06 22:26:06,498 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 220 transitions, 480 flow [2023-11-06 22:26:06,499 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:26:06,499 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 220 transitions, 480 flow [2023-11-06 22:26:06,500 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 220 transitions, 480 flow [2023-11-06 22:26:06,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 220 transitions, 480 flow [2023-11-06 22:26:06,652 INFO L124 PetriNetUnfolderBase]: 99/756 cut-off events. [2023-11-06 22:26:06,652 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-06 22:26:06,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 756 events. 99/756 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3366 event pairs, 6 based on Foata normal form. 0/653 useless extension candidates. Maximal degree in co-relation 540. Up to 32 conditions per place. [2023-11-06 22:26:06,694 INFO L119 LiptonReduction]: Number of co-enabled transitions 22264 [2023-11-06 22:26:11,547 INFO L134 LiptonReduction]: Checked pairs total: 37761 [2023-11-06 22:26:11,547 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-11-06 22:26:11,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:26:11,550 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;@a615054, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:26:11,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 22:26:11,554 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:26:11,555 INFO L124 PetriNetUnfolderBase]: 8/31 cut-off events. [2023-11-06 22:26:11,555 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:26:11,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:11,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:26:11,556 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:26:11,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:11,556 INFO L85 PathProgramCache]: Analyzing trace with hash -7677977, now seen corresponding path program 1 times [2023-11-06 22:26:11,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:11,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676373331] [2023-11-06 22:26:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:11,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:11,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:11,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676373331] [2023-11-06 22:26:11,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676373331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:11,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:11,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:26:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830210001] [2023-11-06 22:26:11,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:11,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:11,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:11,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:11,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:11,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 418 [2023-11-06 22:26:11,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 71 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 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) [2023-11-06 22:26:11,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:11,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 418 [2023-11-06 22:26:11,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:28,353 INFO L124 PetriNetUnfolderBase]: 119313/166981 cut-off events. [2023-11-06 22:26:28,353 INFO L125 PetriNetUnfolderBase]: For 6219/6219 co-relation queries the response was YES. [2023-11-06 22:26:28,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331712 conditions, 166981 events. 119313/166981 cut-off events. For 6219/6219 co-relation queries the response was YES. Maximal size of possible extension queue 4488. Compared 1210087 event pairs, 57110 based on Foata normal form. 27777/170295 useless extension candidates. Maximal degree in co-relation 42808. Up to 82768 conditions per place. [2023-11-06 22:26:29,479 INFO L140 encePairwiseOnDemand]: 392/418 looper letters, 72 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2023-11-06 22:26:29,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 86 transitions, 380 flow [2023-11-06 22:26:29,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:26:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 666 transitions. [2023-11-06 22:26:29,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311004784688995 [2023-11-06 22:26:29,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 666 transitions. [2023-11-06 22:26:29,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 666 transitions. [2023-11-06 22:26:29,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:29,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 666 transitions. [2023-11-06 22:26:29,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 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) [2023-11-06 22:26:29,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 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) [2023-11-06 22:26:29,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 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) [2023-11-06 22:26:29,493 INFO L175 Difference]: Start difference. First operand has 58 places, 71 transitions, 182 flow. Second operand 3 states and 666 transitions. [2023-11-06 22:26:29,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 86 transitions, 380 flow [2023-11-06 22:26:29,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 86 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:26:29,501 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 198 flow [2023-11-06 22:26:29,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2023-11-06 22:26:29,503 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2023-11-06 22:26:29,504 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 198 flow [2023-11-06 22:26:29,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 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) [2023-11-06 22:26:29,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:29,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:29,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:26:29,506 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:26:29,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:29,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1051417518, now seen corresponding path program 1 times [2023-11-06 22:26:29,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:29,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722230780] [2023-11-06 22:26:29,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:29,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:29,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:29,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722230780] [2023-11-06 22:26:29,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722230780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:29,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866054736] [2023-11-06 22:26:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:29,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:29,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:29,587 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:29,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:26:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:29,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:26:29,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:29,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:29,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866054736] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:29,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:29,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:26:29,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076773678] [2023-11-06 22:26:29,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:29,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:26:29,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:29,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:26:29,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:26:29,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 418 [2023-11-06 22:26:29,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 182.71428571428572) internal successors, (1279), 7 states have internal predecessors, (1279), 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) [2023-11-06 22:26:29,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:29,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 418 [2023-11-06 22:26:29,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:26:44,772 INFO L124 PetriNetUnfolderBase]: 109901/153200 cut-off events. [2023-11-06 22:26:44,772 INFO L125 PetriNetUnfolderBase]: For 46556/46556 co-relation queries the response was YES. [2023-11-06 22:26:45,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349255 conditions, 153200 events. 109901/153200 cut-off events. For 46556/46556 co-relation queries the response was YES. Maximal size of possible extension queue 4170. Compared 1093334 event pairs, 19291 based on Foata normal form. 0/142973 useless extension candidates. Maximal degree in co-relation 75839. Up to 141853 conditions per place. [2023-11-06 22:26:45,957 INFO L140 encePairwiseOnDemand]: 414/418 looper letters, 91 selfloop transitions, 6 changer transitions 0/105 dead transitions. [2023-11-06 22:26:45,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 105 transitions, 504 flow [2023-11-06 22:26:45,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:26:45,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:26:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1176 transitions. [2023-11-06 22:26:45,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4688995215311005 [2023-11-06 22:26:45,963 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1176 transitions. [2023-11-06 22:26:45,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1176 transitions. [2023-11-06 22:26:45,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:26:45,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1176 transitions. [2023-11-06 22:26:45,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 196.0) internal successors, (1176), 6 states have internal predecessors, (1176), 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) [2023-11-06 22:26:45,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 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) [2023-11-06 22:26:45,977 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 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) [2023-11-06 22:26:45,978 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 198 flow. Second operand 6 states and 1176 transitions. [2023-11-06 22:26:45,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 105 transitions, 504 flow [2023-11-06 22:26:46,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 105 transitions, 492 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:26:46,075 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 228 flow [2023-11-06 22:26:46,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-11-06 22:26:46,079 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2023-11-06 22:26:46,079 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 228 flow [2023-11-06 22:26:46,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 182.71428571428572) internal successors, (1279), 7 states have internal predecessors, (1279), 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) [2023-11-06 22:26:46,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:46,080 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:46,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:46,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb9ddbe4-e74f-4bb2-b605-75bc77cb78cc/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:46,292 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:26:46,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:46,293 INFO L85 PathProgramCache]: Analyzing trace with hash 64232436, now seen corresponding path program 1 times [2023-11-06 22:26:46,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:46,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710623190] [2023-11-06 22:26:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:46,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:26:46,322 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:26:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:26:46,344 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:26:46,345 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:26:46,345 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-06 22:26:46,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-06 22:26:46,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-06 22:26:46,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-06 22:26:46,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-06 22:26:46,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-06 22:26:46,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:26:46,346 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 22:26:46,347 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:26:46,347 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-06 22:26:46,377 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-06 22:26:46,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 244 transitions, 543 flow [2023-11-06 22:26:46,569 INFO L124 PetriNetUnfolderBase]: 161/1140 cut-off events. [2023-11-06 22:26:46,569 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-06 22:26:46,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 1140 events. 161/1140 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5733 event pairs, 23 based on Foata normal form. 0/990 useless extension candidates. Maximal degree in co-relation 801. Up to 80 conditions per place. [2023-11-06 22:26:46,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 244 transitions, 543 flow [2023-11-06 22:26:46,594 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 244 transitions, 543 flow [2023-11-06 22:26:46,595 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:26:46,595 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 244 transitions, 543 flow [2023-11-06 22:26:46,595 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 244 transitions, 543 flow [2023-11-06 22:26:46,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 244 transitions, 543 flow [2023-11-06 22:26:46,772 INFO L124 PetriNetUnfolderBase]: 161/1140 cut-off events. [2023-11-06 22:26:46,773 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-06 22:26:46,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 1140 events. 161/1140 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5733 event pairs, 23 based on Foata normal form. 0/990 useless extension candidates. Maximal degree in co-relation 801. Up to 80 conditions per place. [2023-11-06 22:26:46,828 INFO L119 LiptonReduction]: Number of co-enabled transitions 30580 [2023-11-06 22:26:51,860 INFO L134 LiptonReduction]: Checked pairs total: 54521 [2023-11-06 22:26:51,860 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-11-06 22:26:51,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:26:51,863 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;@a615054, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:26:51,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-06 22:26:51,866 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:26:51,866 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-11-06 22:26:51,866 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:26:51,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:26:51,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:26:51,867 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-06 22:26:51,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:51,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1579428940, now seen corresponding path program 1 times [2023-11-06 22:26:51,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:51,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809760197] [2023-11-06 22:26:51,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:51,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:51,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:51,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809760197] [2023-11-06 22:26:51,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809760197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:51,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:51,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:26:51,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885172237] [2023-11-06 22:26:51,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:51,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:51,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:51,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:51,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:51,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 465 [2023-11-06 22:26:51,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 78 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 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) [2023-11-06 22:26:51,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:26:51,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 465 [2023-11-06 22:26:51,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand