./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/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_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/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_bddc9dfa-5e97-4534-97a8-100c088e6987/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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:01:18,876 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:01:18,946 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:01:18,951 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:01:18,952 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:01:18,980 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:01:18,980 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:01:18,981 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:01:18,982 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:01:18,982 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:01:18,983 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:01:18,984 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:01:18,985 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:01:18,985 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:01:18,986 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:01:18,986 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:01:18,987 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:01:18,987 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:01:18,988 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:01:18,988 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:01:18,989 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:01:18,993 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:01:18,994 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:01:18,994 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:01:18,995 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:01:18,996 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:01:18,997 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:01:18,997 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:01:18,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:01:18,998 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:01:18,999 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:01:19,010 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:01:19,011 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:01:19,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:01:19,012 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:01:19,012 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:01:19,012 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:01:19,013 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:01:19,013 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:01:19,013 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_bddc9dfa-5e97-4534-97a8-100c088e6987/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2023-11-06 23:01:19,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:01:19,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:01:19,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:01:19,377 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:01:19,377 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:01:19,379 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread/stack-2.i [2023-11-06 23:01:22,602 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:01:22,949 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:01:22,950 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/sv-benchmarks/c/pthread/stack-2.i [2023-11-06 23:01:22,974 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/data/e35c62c4b/1e8e0cae3a3649e3818ac57521158fe0/FLAGa02d314eb [2023-11-06 23:01:22,992 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/data/e35c62c4b/1e8e0cae3a3649e3818ac57521158fe0 [2023-11-06 23:01:23,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:01:23,003 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:01:23,008 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:01:23,008 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:01:23,013 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:01:23,014 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:22" (1/1) ... [2023-11-06 23:01:23,015 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@628cf93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:23, skipping insertion in model container [2023-11-06 23:01:23,015 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:22" (1/1) ... [2023-11-06 23:01:23,079 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:01:23,638 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_bddc9dfa-5e97-4534-97a8-100c088e6987/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2023-11-06 23:01:23,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:01:23,699 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:01:23,737 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_bddc9dfa-5e97-4534-97a8-100c088e6987/sv-benchmarks/c/pthread/stack-2.i[41520,41533] [2023-11-06 23:01:23,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:01:23,870 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:01:23,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:23 WrapperNode [2023-11-06 23:01:23,871 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:01:23,872 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:01:23,872 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:01:23,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:01:23,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:23" (1/1) ... [2023-11-06 23:01:23,901 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:23" (1/1) ... [2023-11-06 23:01:23,935 INFO L138 Inliner]: procedures = 277, calls = 44, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 159 [2023-11-06 23:01:23,935 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:01:23,936 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:01:23,936 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:01:23,937 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:01:23,947 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:23" (1/1) ... [2023-11-06 23:01:23,947 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:23" (1/1) ... [2023-11-06 23:01:23,952 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:23" (1/1) ... [2023-11-06 23:01:23,953 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:23" (1/1) ... [2023-11-06 23:01:23,962 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:23" (1/1) ... [2023-11-06 23:01:23,966 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:23" (1/1) ... [2023-11-06 23:01:23,968 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:23" (1/1) ... [2023-11-06 23:01:23,970 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:23" (1/1) ... [2023-11-06 23:01:23,974 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:01:23,975 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:01:23,975 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:01:23,976 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:01:23,984 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:23" (1/1) ... [2023-11-06 23:01:23,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:01:24,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:24,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:01:24,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:01:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-06 23:01:24,059 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-06 23:01:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-06 23:01:24,059 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-06 23:01:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:01:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:01:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:01:24,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:01:24,060 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 23:01:24,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:01:24,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:01:24,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:01:24,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:01:24,062 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 23:01:24,226 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:01:24,228 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:01:24,527 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:01:24,537 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:01:24,538 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 23:01:24,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:24 BoogieIcfgContainer [2023-11-06 23:01:24,540 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:01:24,547 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:01:24,547 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:01:24,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:01:24,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:01:22" (1/3) ... [2023-11-06 23:01:24,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4c54a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:24, skipping insertion in model container [2023-11-06 23:01:24,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:23" (2/3) ... [2023-11-06 23:01:24,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4c54a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:24, skipping insertion in model container [2023-11-06 23:01:24,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:24" (3/3) ... [2023-11-06 23:01:24,555 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-11-06 23:01:24,566 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:01:24,575 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:01:24,576 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-06 23:01:24,576 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:01:24,727 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 23:01:24,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 170 transitions, 354 flow [2023-11-06 23:01:24,880 INFO L124 PetriNetUnfolderBase]: 10/168 cut-off events. [2023-11-06 23:01:24,880 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:01:24,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 420 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-11-06 23:01:24,893 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 170 transitions, 354 flow [2023-11-06 23:01:24,900 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 158 transitions, 325 flow [2023-11-06 23:01:24,904 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:01:24,915 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 158 transitions, 325 flow [2023-11-06 23:01:24,918 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 158 transitions, 325 flow [2023-11-06 23:01:24,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 158 transitions, 325 flow [2023-11-06 23:01:24,962 INFO L124 PetriNetUnfolderBase]: 10/158 cut-off events. [2023-11-06 23:01:24,962 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 23:01:24,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 158 events. 10/158 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 341 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2023-11-06 23:01:24,972 INFO L119 LiptonReduction]: Number of co-enabled transitions 8340 [2023-11-06 23:01:30,096 INFO L134 LiptonReduction]: Checked pairs total: 10668 [2023-11-06 23:01:30,096 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-11-06 23:01:30,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:01:30,120 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;@51a153d0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:01:30,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 23:01:30,125 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:01:30,126 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-11-06 23:01:30,126 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 23:01:30,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:30,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:01:30,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:01:30,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1233763141, now seen corresponding path program 1 times [2023-11-06 23:01:30,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:30,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420279400] [2023-11-06 23:01:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:30,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:30,481 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 23:01:30,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:30,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420279400] [2023-11-06 23:01:30,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420279400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:30,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:30,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:01:30,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070214041] [2023-11-06 23:01:30,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:30,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:01:30,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:30,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:01:30,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:30,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 320 [2023-11-06 23:01:30,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 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 23:01:30,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:30,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 320 [2023-11-06 23:01:30,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:30,880 INFO L124 PetriNetUnfolderBase]: 917/1474 cut-off events. [2023-11-06 23:01:30,880 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-06 23:01:30,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3012 conditions, 1474 events. 917/1474 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6132 event pairs, 270 based on Foata normal form. 0/1164 useless extension candidates. Maximal degree in co-relation 2788. Up to 840 conditions per place. [2023-11-06 23:01:30,896 INFO L140 encePairwiseOnDemand]: 315/320 looper letters, 57 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-11-06 23:01:30,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 61 transitions, 259 flow [2023-11-06 23:01:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:01:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-11-06 23:01:30,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5489583333333333 [2023-11-06 23:01:30,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-11-06 23:01:30,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-11-06 23:01:30,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:30,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-11-06 23:01:30,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 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 23:01:30,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 23:01:30,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 23:01:30,955 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 527 transitions. [2023-11-06 23:01:30,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 61 transitions, 259 flow [2023-11-06 23:01:30,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 251 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:01:30,965 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 100 flow [2023-11-06 23:01:30,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-11-06 23:01:30,974 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-11-06 23:01:30,974 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 100 flow [2023-11-06 23:01:30,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 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 23:01:30,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:30,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:30,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:01:30,977 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:01:30,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:30,979 INFO L85 PathProgramCache]: Analyzing trace with hash 180487044, now seen corresponding path program 1 times [2023-11-06 23:01:30,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:30,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925696010] [2023-11-06 23:01:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:30,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:31,183 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 23:01:31,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:31,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925696010] [2023-11-06 23:01:31,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925696010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:31,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:31,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:01:31,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731628686] [2023-11-06 23:01:31,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:31,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:01:31,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:31,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:01:31,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:31,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 320 [2023-11-06 23:01:31,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:31,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:31,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 320 [2023-11-06 23:01:31,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:31,470 INFO L124 PetriNetUnfolderBase]: 987/1600 cut-off events. [2023-11-06 23:01:31,471 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2023-11-06 23:01:31,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3491 conditions, 1600 events. 987/1600 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6546 event pairs, 449 based on Foata normal form. 0/1334 useless extension candidates. Maximal degree in co-relation 3218. Up to 1301 conditions per place. [2023-11-06 23:01:31,484 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 50 selfloop transitions, 2 changer transitions 3/55 dead transitions. [2023-11-06 23:01:31,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 55 transitions, 255 flow [2023-11-06 23:01:31,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:01:31,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-11-06 23:01:31,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427083333333333 [2023-11-06 23:01:31,489 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-11-06 23:01:31,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-11-06 23:01:31,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:31,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-11-06 23:01:31,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 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 23:01:31,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 23:01:31,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 23:01:31,498 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 100 flow. Second operand 3 states and 521 transitions. [2023-11-06 23:01:31,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 55 transitions, 255 flow [2023-11-06 23:01:31,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 245 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:01:31,507 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 104 flow [2023-11-06 23:01:31,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-11-06 23:01:31,509 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-11-06 23:01:31,509 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 104 flow [2023-11-06 23:01:31,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:31,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:31,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:31,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:01:31,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:01:31,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1955638891, now seen corresponding path program 1 times [2023-11-06 23:01:31,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:31,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367850467] [2023-11-06 23:01:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:31,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:31,648 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 23:01:31,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:31,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367850467] [2023-11-06 23:01:31,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367850467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:31,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:31,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:01:31,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417979295] [2023-11-06 23:01:31,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:31,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:01:31,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:31,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:01:31,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:31,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 320 [2023-11-06 23:01:31,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 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 23:01:31,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:31,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 320 [2023-11-06 23:01:31,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:31,910 INFO L124 PetriNetUnfolderBase]: 1043/1688 cut-off events. [2023-11-06 23:01:31,910 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-11-06 23:01:31,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3762 conditions, 1688 events. 1043/1688 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7102 event pairs, 737 based on Foata normal form. 56/1572 useless extension candidates. Maximal degree in co-relation 3482. Up to 1543 conditions per place. [2023-11-06 23:01:31,925 INFO L140 encePairwiseOnDemand]: 317/320 looper letters, 53 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-11-06 23:01:31,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 272 flow [2023-11-06 23:01:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:31,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:01:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-11-06 23:01:31,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5385416666666667 [2023-11-06 23:01:31,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-11-06 23:01:31,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-11-06 23:01:31,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:31,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-11-06 23:01:31,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 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 23:01:31,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 23:01:31,935 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 23:01:31,935 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 104 flow. Second operand 3 states and 517 transitions. [2023-11-06 23:01:31,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 272 flow [2023-11-06 23:01:31,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:01:31,939 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 122 flow [2023-11-06 23:01:31,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-11-06 23:01:31,940 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2023-11-06 23:01:31,940 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 122 flow [2023-11-06 23:01:31,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 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 23:01:31,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:31,941 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:31,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:01:31,942 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:01:31,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:31,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1158974715, now seen corresponding path program 1 times [2023-11-06 23:01:31,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:31,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311876308] [2023-11-06 23:01:31,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:31,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:32,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:32,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311876308] [2023-11-06 23:01:32,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311876308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:32,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792290651] [2023-11-06 23:01:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:32,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:32,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:32,046 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:32,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:01:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:32,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:01:32,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:32,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:32,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792290651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:32,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:01:32,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-06 23:01:32,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826230021] [2023-11-06 23:01:32,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:32,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:01:32,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:32,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:01:32,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:01:32,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 320 [2023-11-06 23:01:32,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 122 flow. Second operand has 10 states, 10 states have (on average 154.6) internal successors, (1546), 10 states have internal predecessors, (1546), 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 23:01:32,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:32,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 320 [2023-11-06 23:01:32,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:33,206 INFO L124 PetriNetUnfolderBase]: 1986/3223 cut-off events. [2023-11-06 23:01:33,206 INFO L125 PetriNetUnfolderBase]: For 1186/1186 co-relation queries the response was YES. [2023-11-06 23:01:33,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7663 conditions, 3223 events. 1986/3223 cut-off events. For 1186/1186 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 15015 event pairs, 399 based on Foata normal form. 52/2955 useless extension candidates. Maximal degree in co-relation 7184. Up to 909 conditions per place. [2023-11-06 23:01:33,233 INFO L140 encePairwiseOnDemand]: 314/320 looper letters, 173 selfloop transitions, 22 changer transitions 0/195 dead transitions. [2023-11-06 23:01:33,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 195 transitions, 934 flow [2023-11-06 23:01:33,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:01:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:01:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1704 transitions. [2023-11-06 23:01:33,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5325 [2023-11-06 23:01:33,241 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1704 transitions. [2023-11-06 23:01:33,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1704 transitions. [2023-11-06 23:01:33,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:33,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1704 transitions. [2023-11-06 23:01:33,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 170.4) internal successors, (1704), 10 states have internal predecessors, (1704), 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 23:01:33,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 320.0) internal successors, (3520), 11 states have internal predecessors, (3520), 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 23:01:33,260 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 320.0) internal successors, (3520), 11 states have internal predecessors, (3520), 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 23:01:33,260 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 122 flow. Second operand 10 states and 1704 transitions. [2023-11-06 23:01:33,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 195 transitions, 934 flow [2023-11-06 23:01:33,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 195 transitions, 921 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:01:33,269 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 280 flow [2023-11-06 23:01:33,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=280, PETRI_PLACES=51, PETRI_TRANSITIONS=56} [2023-11-06 23:01:33,271 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-11-06 23:01:33,271 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 280 flow [2023-11-06 23:01:33,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.6) internal successors, (1546), 10 states have internal predecessors, (1546), 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 23:01:33,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:33,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:33,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:33,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:33,479 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:01:33,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:33,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1889089159, now seen corresponding path program 1 times [2023-11-06 23:01:33,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:33,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362841537] [2023-11-06 23:01:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:33,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:33,617 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 23:01:33,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:33,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362841537] [2023-11-06 23:01:33,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362841537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:33,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:33,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:01:33,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244370987] [2023-11-06 23:01:33,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:33,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:01:33,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:33,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:01:33,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:01:33,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 320 [2023-11-06 23:01:33,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 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 23:01:33,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:33,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 320 [2023-11-06 23:01:33,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:33,864 INFO L124 PetriNetUnfolderBase]: 646/1175 cut-off events. [2023-11-06 23:01:33,864 INFO L125 PetriNetUnfolderBase]: For 307/307 co-relation queries the response was YES. [2023-11-06 23:01:33,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2894 conditions, 1175 events. 646/1175 cut-off events. For 307/307 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4867 event pairs, 98 based on Foata normal form. 0/1095 useless extension candidates. Maximal degree in co-relation 2384. Up to 926 conditions per place. [2023-11-06 23:01:33,873 INFO L140 encePairwiseOnDemand]: 315/320 looper letters, 50 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-11-06 23:01:33,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 337 flow [2023-11-06 23:01:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:01:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:01:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 503 transitions. [2023-11-06 23:01:33,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5239583333333333 [2023-11-06 23:01:33,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 503 transitions. [2023-11-06 23:01:33,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 503 transitions. [2023-11-06 23:01:33,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:33,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 503 transitions. [2023-11-06 23:01:33,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 23:01:33,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 23:01:33,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 320.0) internal successors, (1280), 4 states have internal predecessors, (1280), 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 23:01:33,882 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 280 flow. Second operand 3 states and 503 transitions. [2023-11-06 23:01:33,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 337 flow [2023-11-06 23:01:33,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 325 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-06 23:01:33,887 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2023-11-06 23:01:33,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-11-06 23:01:33,889 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-11-06 23:01:33,889 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2023-11-06 23:01:33,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 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 23:01:33,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:33,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:33,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:01:33,890 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:01:33,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:33,891 INFO L85 PathProgramCache]: Analyzing trace with hash 2052968563, now seen corresponding path program 1 times [2023-11-06 23:01:33,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:33,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761505508] [2023-11-06 23:01:33,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:33,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:33,988 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 23:01:33,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:33,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761505508] [2023-11-06 23:01:33,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761505508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:33,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:33,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:01:33,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279354353] [2023-11-06 23:01:33,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:33,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:01:33,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:33,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:01:33,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:01:34,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 320 [2023-11-06 23:01:34,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 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 23:01:34,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:34,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 320 [2023-11-06 23:01:34,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:34,353 INFO L124 PetriNetUnfolderBase]: 766/1395 cut-off events. [2023-11-06 23:01:34,353 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2023-11-06 23:01:34,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3542 conditions, 1395 events. 766/1395 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5810 event pairs, 234 based on Foata normal form. 12/1407 useless extension candidates. Maximal degree in co-relation 2916. Up to 553 conditions per place. [2023-11-06 23:01:34,364 INFO L140 encePairwiseOnDemand]: 314/320 looper letters, 83 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2023-11-06 23:01:34,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 94 transitions, 536 flow [2023-11-06 23:01:34,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:01:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:01:34,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 842 transitions. [2023-11-06 23:01:34,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52625 [2023-11-06 23:01:34,370 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 842 transitions. [2023-11-06 23:01:34,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 842 transitions. [2023-11-06 23:01:34,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:34,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 842 transitions. [2023-11-06 23:01:34,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.4) internal successors, (842), 5 states have internal predecessors, (842), 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 23:01:34,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 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 23:01:34,380 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 320.0) internal successors, (1920), 6 states have internal predecessors, (1920), 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 23:01:34,381 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 5 states and 842 transitions. [2023-11-06 23:01:34,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 94 transitions, 536 flow [2023-11-06 23:01:34,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 94 transitions, 523 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:01:34,387 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 258 flow [2023-11-06 23:01:34,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-06 23:01:34,388 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-11-06 23:01:34,388 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 258 flow [2023-11-06 23:01:34,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.6) internal successors, (773), 5 states have internal predecessors, (773), 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 23:01:34,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:34,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:34,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:01:34,390 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:01:34,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:34,390 INFO L85 PathProgramCache]: Analyzing trace with hash 250007796, now seen corresponding path program 1 times [2023-11-06 23:01:34,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:34,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86900772] [2023-11-06 23:01:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:34,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:35,373 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 23:01:35,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:35,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86900772] [2023-11-06 23:01:35,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86900772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:35,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:35,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-06 23:01:35,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219363839] [2023-11-06 23:01:35,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:35,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:01:35,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:35,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:01:35,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:01:37,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 320 [2023-11-06 23:01:37,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 258 flow. Second operand has 15 states, 15 states have (on average 124.46666666666667) internal successors, (1867), 15 states have internal predecessors, (1867), 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 23:01:37,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:37,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 320 [2023-11-06 23:01:37,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:38,912 INFO L124 PetriNetUnfolderBase]: 1146/2094 cut-off events. [2023-11-06 23:01:38,912 INFO L125 PetriNetUnfolderBase]: For 1193/1193 co-relation queries the response was YES. [2023-11-06 23:01:38,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5356 conditions, 2094 events. 1146/2094 cut-off events. For 1193/1193 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9975 event pairs, 294 based on Foata normal form. 14/2090 useless extension candidates. Maximal degree in co-relation 3166. Up to 1230 conditions per place. [2023-11-06 23:01:38,930 INFO L140 encePairwiseOnDemand]: 302/320 looper letters, 135 selfloop transitions, 31 changer transitions 3/169 dead transitions. [2023-11-06 23:01:38,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 169 transitions, 968 flow [2023-11-06 23:01:38,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 23:01:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 23:01:38,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2366 transitions. [2023-11-06 23:01:38,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107638888888889 [2023-11-06 23:01:38,940 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2366 transitions. [2023-11-06 23:01:38,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2366 transitions. [2023-11-06 23:01:38,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:38,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2366 transitions. [2023-11-06 23:01:38,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 131.44444444444446) internal successors, (2366), 18 states have internal predecessors, (2366), 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 23:01:38,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 320.0) internal successors, (6080), 19 states have internal predecessors, (6080), 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 23:01:38,965 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 320.0) internal successors, (6080), 19 states have internal predecessors, (6080), 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 23:01:38,965 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 258 flow. Second operand 18 states and 2366 transitions. [2023-11-06 23:01:38,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 169 transitions, 968 flow [2023-11-06 23:01:38,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 169 transitions, 949 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 23:01:38,976 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 537 flow [2023-11-06 23:01:38,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=537, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2023-11-06 23:01:38,977 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 48 predicate places. [2023-11-06 23:01:38,977 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 537 flow [2023-11-06 23:01:38,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 124.46666666666667) internal successors, (1867), 15 states have internal predecessors, (1867), 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 23:01:38,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:38,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:38,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 23:01:38,980 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:01:38,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:38,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1879347030, now seen corresponding path program 2 times [2023-11-06 23:01:38,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:38,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569865122] [2023-11-06 23:01:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:38,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:40,189 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 23:01:40,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:40,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569865122] [2023-11-06 23:01:40,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569865122] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:40,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:40,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-06 23:01:40,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332639296] [2023-11-06 23:01:40,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:40,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:01:40,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:40,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:01:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:01:42,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 320 [2023-11-06 23:01:42,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 537 flow. Second operand has 16 states, 16 states have (on average 120.375) internal successors, (1926), 16 states have internal predecessors, (1926), 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 23:01:42,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:42,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 320 [2023-11-06 23:01:42,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:44,054 INFO L124 PetriNetUnfolderBase]: 1656/3023 cut-off events. [2023-11-06 23:01:44,055 INFO L125 PetriNetUnfolderBase]: For 2650/2650 co-relation queries the response was YES. [2023-11-06 23:01:44,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8977 conditions, 3023 events. 1656/3023 cut-off events. For 2650/2650 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 14830 event pairs, 484 based on Foata normal form. 4/2997 useless extension candidates. Maximal degree in co-relation 5464. Up to 1862 conditions per place. [2023-11-06 23:01:44,086 INFO L140 encePairwiseOnDemand]: 303/320 looper letters, 154 selfloop transitions, 36 changer transitions 3/193 dead transitions. [2023-11-06 23:01:44,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 193 transitions, 1399 flow [2023-11-06 23:01:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:01:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 23:01:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1924 transitions. [2023-11-06 23:01:44,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4008333333333333 [2023-11-06 23:01:44,095 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1924 transitions. [2023-11-06 23:01:44,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1924 transitions. [2023-11-06 23:01:44,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:44,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1924 transitions. [2023-11-06 23:01:44,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 128.26666666666668) internal successors, (1924), 15 states have internal predecessors, (1924), 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 23:01:44,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 320.0) internal successors, (5120), 16 states have internal predecessors, (5120), 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 23:01:44,115 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 320.0) internal successors, (5120), 16 states have internal predecessors, (5120), 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 23:01:44,116 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 537 flow. Second operand 15 states and 1924 transitions. [2023-11-06 23:01:44,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 193 transitions, 1399 flow [2023-11-06 23:01:44,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 193 transitions, 1379 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-11-06 23:01:44,134 INFO L231 Difference]: Finished difference. Result has 109 places, 107 transitions, 915 flow [2023-11-06 23:01:44,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=915, PETRI_PLACES=109, PETRI_TRANSITIONS=107} [2023-11-06 23:01:44,135 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 74 predicate places. [2023-11-06 23:01:44,135 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 107 transitions, 915 flow [2023-11-06 23:01:44,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 120.375) internal successors, (1926), 16 states have internal predecessors, (1926), 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 23:01:44,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:44,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:44,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 23:01:44,137 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:01:44,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:44,138 INFO L85 PathProgramCache]: Analyzing trace with hash 593129738, now seen corresponding path program 3 times [2023-11-06 23:01:44,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:44,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805970891] [2023-11-06 23:01:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:44,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:45,292 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 23:01:45,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:45,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805970891] [2023-11-06 23:01:45,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805970891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:45,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:01:45,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-06 23:01:45,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734311309] [2023-11-06 23:01:45,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:45,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:01:45,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:45,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:01:45,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:01:47,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 320 [2023-11-06 23:01:47,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 107 transitions, 915 flow. Second operand has 16 states, 16 states have (on average 120.375) internal successors, (1926), 16 states have internal predecessors, (1926), 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 23:01:47,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:47,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 320 [2023-11-06 23:01:47,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:49,548 INFO L124 PetriNetUnfolderBase]: 1986/3631 cut-off events. [2023-11-06 23:01:49,548 INFO L125 PetriNetUnfolderBase]: For 4626/4626 co-relation queries the response was YES. [2023-11-06 23:01:49,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11696 conditions, 3631 events. 1986/3631 cut-off events. For 4626/4626 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 18712 event pairs, 320 based on Foata normal form. 14/3609 useless extension candidates. Maximal degree in co-relation 8288. Up to 1213 conditions per place. [2023-11-06 23:01:49,591 INFO L140 encePairwiseOnDemand]: 303/320 looper letters, 138 selfloop transitions, 73 changer transitions 3/214 dead transitions. [2023-11-06 23:01:49,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 214 transitions, 1764 flow [2023-11-06 23:01:49,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 23:01:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 23:01:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2412 transitions. [2023-11-06 23:01:49,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39671052631578946 [2023-11-06 23:01:49,601 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2412 transitions. [2023-11-06 23:01:49,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2412 transitions. [2023-11-06 23:01:49,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:49,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2412 transitions. [2023-11-06 23:01:49,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 126.94736842105263) internal successors, (2412), 19 states have internal predecessors, (2412), 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 23:01:49,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 320.0) internal successors, (6400), 20 states have internal predecessors, (6400), 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 23:01:49,625 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 320.0) internal successors, (6400), 20 states have internal predecessors, (6400), 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 23:01:49,625 INFO L175 Difference]: Start difference. First operand has 109 places, 107 transitions, 915 flow. Second operand 19 states and 2412 transitions. [2023-11-06 23:01:49,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 214 transitions, 1764 flow [2023-11-06 23:01:49,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 214 transitions, 1758 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-06 23:01:49,659 INFO L231 Difference]: Finished difference. Result has 138 places, 126 transitions, 1367 flow [2023-11-06 23:01:49,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1367, PETRI_PLACES=138, PETRI_TRANSITIONS=126} [2023-11-06 23:01:49,661 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 103 predicate places. [2023-11-06 23:01:49,661 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 126 transitions, 1367 flow [2023-11-06 23:01:49,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 120.375) internal successors, (1926), 16 states have internal predecessors, (1926), 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 23:01:49,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:49,663 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:49,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 23:01:49,663 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:01:49,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:49,664 INFO L85 PathProgramCache]: Analyzing trace with hash 62648725, now seen corresponding path program 2 times [2023-11-06 23:01:49,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:49,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223310020] [2023-11-06 23:01:49,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:49,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:49,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:49,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223310020] [2023-11-06 23:01:49,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223310020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:49,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475586711] [2023-11-06 23:01:49,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:01:49,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:49,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:49,846 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:49,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:01:50,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:01:50,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:01:50,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:01:50,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:50,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:01:50,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475586711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:01:50,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:01:50,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 9 [2023-11-06 23:01:50,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387693353] [2023-11-06 23:01:50,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:01:50,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:01:50,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:50,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:01:50,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:01:50,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 320 [2023-11-06 23:01:50,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 126 transitions, 1367 flow. Second operand has 7 states, 7 states have (on average 154.71428571428572) internal successors, (1083), 7 states have internal predecessors, (1083), 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 23:01:50,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:50,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 320 [2023-11-06 23:01:50,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:51,213 INFO L124 PetriNetUnfolderBase]: 2064/3779 cut-off events. [2023-11-06 23:01:51,214 INFO L125 PetriNetUnfolderBase]: For 8476/8476 co-relation queries the response was YES. [2023-11-06 23:01:51,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13809 conditions, 3779 events. 2064/3779 cut-off events. For 8476/8476 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 19394 event pairs, 785 based on Foata normal form. 12/3755 useless extension candidates. Maximal degree in co-relation 10231. Up to 1193 conditions per place. [2023-11-06 23:01:51,251 INFO L140 encePairwiseOnDemand]: 314/320 looper letters, 185 selfloop transitions, 32 changer transitions 0/217 dead transitions. [2023-11-06 23:01:51,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 217 transitions, 2370 flow [2023-11-06 23:01:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:01:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:01:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1325 transitions. [2023-11-06 23:01:51,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.517578125 [2023-11-06 23:01:51,257 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1325 transitions. [2023-11-06 23:01:51,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1325 transitions. [2023-11-06 23:01:51,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:51,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1325 transitions. [2023-11-06 23:01:51,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 165.625) internal successors, (1325), 8 states have internal predecessors, (1325), 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 23:01:51,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 320.0) internal successors, (2880), 9 states have internal predecessors, (2880), 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 23:01:51,269 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 320.0) internal successors, (2880), 9 states have internal predecessors, (2880), 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 23:01:51,269 INFO L175 Difference]: Start difference. First operand has 138 places, 126 transitions, 1367 flow. Second operand 8 states and 1325 transitions. [2023-11-06 23:01:51,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 217 transitions, 2370 flow [2023-11-06 23:01:51,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 217 transitions, 2200 flow, removed 68 selfloop flow, removed 8 redundant places. [2023-11-06 23:01:51,326 INFO L231 Difference]: Finished difference. Result has 140 places, 129 transitions, 1412 flow [2023-11-06 23:01:51,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=320, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1412, PETRI_PLACES=140, PETRI_TRANSITIONS=129} [2023-11-06 23:01:51,328 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 105 predicate places. [2023-11-06 23:01:51,328 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 129 transitions, 1412 flow [2023-11-06 23:01:51,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 154.71428571428572) internal successors, (1083), 7 states have internal predecessors, (1083), 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 23:01:51,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:51,330 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:51,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:51,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:01:51,537 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-06 23:01:51,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:51,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1352033986, now seen corresponding path program 1 times [2023-11-06 23:01:51,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:51,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888282285] [2023-11-06 23:01:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:51,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:01:51,566 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 23:01:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 23:01:51,650 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 23:01:51,650 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 23:01:51,651 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-11-06 23:01:51,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-11-06 23:01:51,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-06 23:01:51,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-06 23:01:51,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-06 23:01:51,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-06 23:01:51,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 23:01:51,655 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:51,661 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-06 23:01:51,661 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 23:01:51,744 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 11:01:51 BasicIcfg [2023-11-06 23:01:51,744 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 23:01:51,745 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 23:01:51,745 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 23:01:51,745 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 23:01:51,746 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:24" (3/4) ... [2023-11-06 23:01:51,747 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-06 23:01:51,839 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 23:01:51,840 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 23:01:51,840 INFO L158 Benchmark]: Toolchain (without parser) took 28837.15ms. Allocated memory was 121.6MB in the beginning and 287.3MB in the end (delta: 165.7MB). Free memory was 74.5MB in the beginning and 96.8MB in the end (delta: -22.3MB). Peak memory consumption was 144.2MB. Max. memory is 16.1GB. [2023-11-06 23:01:51,841 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 121.6MB. Free memory is still 92.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 23:01:51,841 INFO L158 Benchmark]: CACSL2BoogieTranslator took 863.81ms. Allocated memory was 121.6MB in the beginning and 165.7MB in the end (delta: 44.0MB). Free memory was 74.5MB in the beginning and 135.6MB in the end (delta: -61.2MB). Peak memory consumption was 39.5MB. Max. memory is 16.1GB. [2023-11-06 23:01:51,842 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.41ms. Allocated memory is still 165.7MB. Free memory was 135.6MB in the beginning and 132.7MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 23:01:51,842 INFO L158 Benchmark]: Boogie Preprocessor took 38.32ms. Allocated memory is still 165.7MB. Free memory was 132.7MB in the beginning and 130.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 23:01:51,842 INFO L158 Benchmark]: RCFGBuilder took 565.41ms. Allocated memory is still 165.7MB. Free memory was 130.6MB in the beginning and 112.6MB in the end (delta: 18.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-06 23:01:51,843 INFO L158 Benchmark]: TraceAbstraction took 27197.80ms. Allocated memory was 165.7MB in the beginning and 287.3MB in the end (delta: 121.6MB). Free memory was 112.6MB in the beginning and 105.2MB in the end (delta: 7.4MB). Peak memory consumption was 127.8MB. Max. memory is 16.1GB. [2023-11-06 23:01:51,843 INFO L158 Benchmark]: Witness Printer took 94.90ms. Allocated memory is still 287.3MB. Free memory was 105.2MB in the beginning and 96.8MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-06 23:01:51,846 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 121.6MB. Free memory is still 92.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 863.81ms. Allocated memory was 121.6MB in the beginning and 165.7MB in the end (delta: 44.0MB). Free memory was 74.5MB in the beginning and 135.6MB in the end (delta: -61.2MB). Peak memory consumption was 39.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.41ms. Allocated memory is still 165.7MB. Free memory was 135.6MB in the beginning and 132.7MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.32ms. Allocated memory is still 165.7MB. Free memory was 132.7MB in the beginning and 130.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 565.41ms. Allocated memory is still 165.7MB. Free memory was 130.6MB in the beginning and 112.6MB in the end (delta: 18.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 27197.80ms. Allocated memory was 165.7MB in the beginning and 287.3MB in the end (delta: 121.6MB). Free memory was 112.6MB in the beginning and 105.2MB in the end (delta: 7.4MB). Peak memory consumption was 127.8MB. Max. memory is 16.1GB. * Witness Printer took 94.90ms. Allocated memory is still 287.3MB. Free memory was 105.2MB in the beginning and 96.8MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.2s, 155 PlacesBefore, 35 PlacesAfterwards, 158 TransitionsBefore, 33 TransitionsAfterwards, 8340 CoEnabledTransitionPairs, 6 FixpointIterations, 29 TrivialSequentialCompositions, 94 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 22 ConcurrentYvCompositions, 5 ChoiceCompositions, 150 TotalNumberOfCompositions, 10668 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7682, independent: 7495, independent conditional: 0, independent unconditional: 7495, dependent: 187, dependent conditional: 0, dependent unconditional: 187, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4706, independent: 4650, independent conditional: 0, independent unconditional: 4650, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7682, independent: 2845, independent conditional: 0, independent unconditional: 2845, dependent: 131, dependent conditional: 0, dependent unconditional: 131, unknown: 4706, unknown conditional: 0, unknown unconditional: 4706] , Statistics on independence cache: Total cache size (in pairs): 168, Positive cache size: 151, Positive conditional cache size: 0, Positive unconditional cache size: 151, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(5)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1021] 0 pthread_t id1, id2; [L1023] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={6:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=0, top=0] [L990] 1 int i; [L991] 1 unsigned int tmp; [L992] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1024] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={6:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=1, top=0] [L992] COND TRUE 1 i<(5) [L995] 1 tmp = __VERIFIER_nondet_uint() [L996] CALL 1 assume_abort_if_not(tmp < (5)) [L23] COND FALSE 1 !(!cond) [L996] RET 1 assume_abort_if_not(tmp < (5)) [L997] CALL, EXPR 1 push(arr,tmp) [L1006] 2 int i; [L1007] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L962] COND FALSE 1 !(top==(5)) [L969] CALL, EXPR 1 get_top() [L954] 1 return top; [L969] RET, EXPR 1 get_top() [L969] 1 stack[get_top()] = x [L970] CALL 1 inc_top() [L946] 1 top++ [L970] RET 1 inc_top() [L972] 1 return 0; [L997] RET, EXPR 1 push(arr,tmp) [L997] COND FALSE 1 !(push(arr,tmp)==(-1)) [L999] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=4, top=1] [L992] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=4, top=1] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND FALSE 2 !(get_top()==0) [L983] CALL 2 dec_top() [L950] 2 top-- [L983] RET 2 dec_top() [L984] CALL, EXPR 2 get_top() [L954] 2 return top; [L984] RET, EXPR 2 get_top() [L984] EXPR 2 stack[get_top()] [L984] 2 return stack[get_top()]; [L1012] RET, EXPR 2 pop(arr) [L1012] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1007] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1007] COND TRUE 2 i<(5) [L1010] COND TRUE 2 \read(flag) [L1012] CALL, EXPR 2 pop(arr) [L976] CALL, EXPR 2 get_top() [L954] 2 return top; [L976] RET, EXPR 2 get_top() [L976] COND TRUE 2 get_top()==0 [L979] 2 return (-2); [L1012] RET, EXPR 2 pop(arr) [L1012] COND TRUE 2 !(pop(arr)!=(-2)) [L1013] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1024]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 270 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 26.9s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 15.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2530 SdHoareTripleChecker+Valid, 9.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2221 mSDsluCounter, 6012 SdHoareTripleChecker+Invalid, 8.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5987 mSDsCounter, 70 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14576 IncrementalHoareTripleChecker+Invalid, 14646 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 70 mSolverCounterUnsat, 25 mSDtfsCounter, 14576 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1412occurred in iteration=10, InterpolantAutomatonStates: 87, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 232 NumberOfCodeBlocks, 232 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 207 ConstructedInterpolants, 0 QuantifiedInterpolants, 1614 SizeOfPredicates, 5 NumberOfNonLiveVariables, 430 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 13 InterpolantComputations, 9 PerfectInterpolantSequences, 13/25 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-06 23:01:51,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bddc9dfa-5e97-4534-97a8-100c088e6987/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE