./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --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 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:22:00,878 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:22:00,943 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 04:22:00,949 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:22:00,949 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:22:00,973 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:22:00,974 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:22:00,974 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:22:00,975 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:22:00,975 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:22:00,976 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:22:00,976 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:22:00,977 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:22:00,978 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:22:00,978 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:22:00,979 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:22:00,979 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 04:22:00,980 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:22:00,980 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:22:00,980 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:22:00,981 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:22:00,981 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 04:22:00,982 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:22:00,982 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 04:22:00,983 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:22:00,983 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 04:22:00,983 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:22:00,984 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:22:00,984 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:22:00,984 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:22:00,985 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:22:00,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:22:00,985 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:22:00,986 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:22:00,986 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 04:22:00,986 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:22:00,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:22:00,986 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:22:00,986 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:22:00,987 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 04:22:00,987 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:22:00,987 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:22:00,987 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_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 [2023-11-29 04:22:01,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:22:01,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:22:01,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:22:01,235 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:22:01,235 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:22:01,236 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread/stack_longer-1.i [2023-11-29 04:22:04,083 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:22:04,315 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:22:04,315 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/sv-benchmarks/c/pthread/stack_longer-1.i [2023-11-29 04:22:04,332 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/data/1e2796515/13fbd1e6844747fd933c78609b532990/FLAGc7561b478 [2023-11-29 04:22:04,345 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/data/1e2796515/13fbd1e6844747fd933c78609b532990 [2023-11-29 04:22:04,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:22:04,348 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:22:04,349 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:22:04,349 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:22:04,353 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:22:04,354 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:22:04" (1/1) ... [2023-11-29 04:22:04,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51986d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:22:04, skipping insertion in model container [2023-11-29 04:22:04,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:22:04" (1/1) ... [2023-11-29 04:22:04,415 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:22:04,807 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_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2023-11-29 04:22:04,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:22:04,843 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:22:04,878 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_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2023-11-29 04:22:04,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:22:04,942 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:22:04,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:22:04 WrapperNode [2023-11-29 04:22:04,943 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:22:04,943 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:22:04,944 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:22:04,944 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:22:04,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:22:04" (1/1) ... [2023-11-29 04:22:04,968 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:22:04" (1/1) ... [2023-11-29 04:22:04,994 INFO L138 Inliner]: procedures = 278, calls = 41, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 161 [2023-11-29 04:22:04,994 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:22:04,995 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:22:04,995 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:22:04,995 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:22:05,004 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:22:04" (1/1) ... [2023-11-29 04:22:05,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:22:04" (1/1) ... [2023-11-29 04:22:05,009 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:22:04" (1/1) ... [2023-11-29 04:22:05,026 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 2, 3, 2, 5]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 0, 0, 5]. The 4 writes are split as follows [0, 1, 2, 1, 0]. [2023-11-29 04:22:05,027 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:22:04" (1/1) ... [2023-11-29 04:22:05,027 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:22:04" (1/1) ... [2023-11-29 04:22:05,036 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:22:04" (1/1) ... [2023-11-29 04:22:05,040 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:22:04" (1/1) ... [2023-11-29 04:22:05,042 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:22:04" (1/1) ... [2023-11-29 04:22:05,044 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:22:04" (1/1) ... [2023-11-29 04:22:05,049 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:22:05,050 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:22:05,050 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:22:05,050 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:22:05,051 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:22:04" (1/1) ... [2023-11-29 04:22:05,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:22:05,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:22:05,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:22:05,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:22:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-29 04:22:05,112 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-29 04:22:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-29 04:22:05,112 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-29 04:22:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:22:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:22:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 04:22:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:22:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:22:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 04:22:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 04:22:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-29 04:22:05,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:22:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:22:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 04:22:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 04:22:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-29 04:22:05,115 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 04:22:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:22:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:22:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:22:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 04:22:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 04:22:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 04:22:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:22:05,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:22:05,119 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 04:22:05,271 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:22:05,273 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:22:05,500 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:22:05,732 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:22:05,733 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 04:22:05,733 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:22:05 BoogieIcfgContainer [2023-11-29 04:22:05,733 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:22:05,735 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:22:05,736 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:22:05,739 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:22:05,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:22:04" (1/3) ... [2023-11-29 04:22:05,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c4375f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:22:05, skipping insertion in model container [2023-11-29 04:22:05,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:22:04" (2/3) ... [2023-11-29 04:22:05,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c4375f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:22:05, skipping insertion in model container [2023-11-29 04:22:05,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:22:05" (3/3) ... [2023-11-29 04:22:05,742 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2023-11-29 04:22:05,750 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 04:22:05,761 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:22:05,762 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-29 04:22:05,762 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 04:22:05,816 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 04:22:05,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 36 transitions, 86 flow [2023-11-29 04:22:05,879 INFO L124 PetriNetUnfolderBase]: 5/34 cut-off events. [2023-11-29 04:22:05,879 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 04:22:05,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 34 events. 5/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2023-11-29 04:22:05,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 36 transitions, 86 flow [2023-11-29 04:22:05,887 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 32 transitions, 73 flow [2023-11-29 04:22:05,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:22:05,903 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=LoopHeads, 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;@16e080a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:22:05,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-29 04:22:05,914 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 04:22:05,914 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2023-11-29 04:22:05,914 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 04:22:05,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:22:05,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:22:05,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 04:22:05,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:22:05,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2102362180, now seen corresponding path program 1 times [2023-11-29 04:22:05,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:22:05,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927649770] [2023-11-29 04:22:05,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:22:05,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:22:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:22:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:22:06,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:22:06,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927649770] [2023-11-29 04:22:06,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927649770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:22:06,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:22:06,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:22:06,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186873307] [2023-11-29 04:22:06,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:22:06,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:22:06,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:22:06,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:22:06,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 04:22:06,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2023-11-29 04:22:06,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2023-11-29 04:22:06,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:22:06,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2023-11-29 04:22:06,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:22:06,575 INFO L124 PetriNetUnfolderBase]: 360/690 cut-off events. [2023-11-29 04:22:06,575 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-11-29 04:22:06,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1336 conditions, 690 events. 360/690 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3236 event pairs, 82 based on Foata normal form. 46/686 useless extension candidates. Maximal degree in co-relation 1175. Up to 375 conditions per place. [2023-11-29 04:22:06,584 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 48 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-11-29 04:22:06,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 58 transitions, 236 flow [2023-11-29 04:22:06,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:22:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 04:22:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2023-11-29 04:22:06,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2023-11-29 04:22:06,596 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 92 transitions. [2023-11-29 04:22:06,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 92 transitions. [2023-11-29 04:22:06,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:22:06,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 92 transitions. [2023-11-29 04:22:06,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2023-11-29 04:22:06,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 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) [2023-11-29 04:22:06,605 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 36.0) internal successors, (180), 5 states have internal predecessors, (180), 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) [2023-11-29 04:22:06,607 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 4 states and 92 transitions. [2023-11-29 04:22:06,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 58 transitions, 236 flow [2023-11-29 04:22:06,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 58 transitions, 227 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 04:22:06,613 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 84 flow [2023-11-29 04:22:06,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-29 04:22:06,618 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-11-29 04:22:06,619 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 84 flow [2023-11-29 04:22:06,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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) [2023-11-29 04:22:06,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:22:06,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:22:06,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:22:06,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 04:22:06,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:22:06,620 INFO L85 PathProgramCache]: Analyzing trace with hash -175873598, now seen corresponding path program 1 times [2023-11-29 04:22:06,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:22:06,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444943920] [2023-11-29 04:22:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:22:06,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:22:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:22:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:22:06,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:22:06,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444943920] [2023-11-29 04:22:06,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444943920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:22:06,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:22:06,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 04:22:06,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710815212] [2023-11-29 04:22:06,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:22:06,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:22:06,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:22:06,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:22:06,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:22:06,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2023-11-29 04:22:06,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2023-11-29 04:22:06,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:22:06,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2023-11-29 04:22:06,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:22:06,867 INFO L124 PetriNetUnfolderBase]: 355/667 cut-off events. [2023-11-29 04:22:06,867 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-29 04:22:06,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 667 events. 355/667 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2994 event pairs, 135 based on Foata normal form. 11/633 useless extension candidates. Maximal degree in co-relation 1024. Up to 415 conditions per place. [2023-11-29 04:22:06,874 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 34 selfloop transitions, 2 changer transitions 3/45 dead transitions. [2023-11-29 04:22:06,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 191 flow [2023-11-29 04:22:06,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:22:06,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:22:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2023-11-29 04:22:06,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2023-11-29 04:22:06,876 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2023-11-29 04:22:06,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2023-11-29 04:22:06,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:22:06,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2023-11-29 04:22:06,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-11-29 04:22:06,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-29 04:22:06,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-29 04:22:06,879 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 84 flow. Second operand 3 states and 64 transitions. [2023-11-29 04:22:06,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 191 flow [2023-11-29 04:22:06,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:22:06,893 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 94 flow [2023-11-29 04:22:06,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-29 04:22:06,895 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-11-29 04:22:06,895 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 94 flow [2023-11-29 04:22:06,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2023-11-29 04:22:06,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:22:06,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:22:06,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:22:06,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 04:22:06,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:22:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash 295937743, now seen corresponding path program 1 times [2023-11-29 04:22:06,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:22:06,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141219162] [2023-11-29 04:22:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:22:06,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:22:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:22:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:22:07,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:22:07,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141219162] [2023-11-29 04:22:07,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141219162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:22:07,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73333449] [2023-11-29 04:22:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:22:07,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:22:07,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:22:07,068 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:22:07,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:22:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:22:07,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 04:22:07,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:22:07,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:22:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:22:07,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:22:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:22:07,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73333449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:22:07,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:22:07,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-29 04:22:07,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680710595] [2023-11-29 04:22:07,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:22:07,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 04:22:07,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:22:07,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 04:22:07,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:22:07,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2023-11-29 04:22:07,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 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) [2023-11-29 04:22:07,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:22:07,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2023-11-29 04:22:07,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:22:08,068 INFO L124 PetriNetUnfolderBase]: 1079/2071 cut-off events. [2023-11-29 04:22:08,068 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-11-29 04:22:08,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4312 conditions, 2071 events. 1079/2071 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 10892 event pairs, 83 based on Foata normal form. 0/1972 useless extension candidates. Maximal degree in co-relation 3738. Up to 408 conditions per place. [2023-11-29 04:22:08,087 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 142 selfloop transitions, 18 changer transitions 3/171 dead transitions. [2023-11-29 04:22:08,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 171 transitions, 753 flow [2023-11-29 04:22:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:22:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 04:22:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 275 transitions. [2023-11-29 04:22:08,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6365740740740741 [2023-11-29 04:22:08,091 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 275 transitions. [2023-11-29 04:22:08,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 275 transitions. [2023-11-29 04:22:08,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:22:08,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 275 transitions. [2023-11-29 04:22:08,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 22.916666666666668) internal successors, (275), 12 states have internal predecessors, (275), 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) [2023-11-29 04:22:08,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 36.0) internal successors, (468), 13 states have internal predecessors, (468), 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) [2023-11-29 04:22:08,097 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 36.0) internal successors, (468), 13 states have internal predecessors, (468), 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) [2023-11-29 04:22:08,097 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 94 flow. Second operand 12 states and 275 transitions. [2023-11-29 04:22:08,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 171 transitions, 753 flow [2023-11-29 04:22:08,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 171 transitions, 751 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:22:08,103 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 239 flow [2023-11-29 04:22:08,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=239, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2023-11-29 04:22:08,104 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2023-11-29 04:22:08,105 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 239 flow [2023-11-29 04:22:08,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 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) [2023-11-29 04:22:08,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:22:08,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:22:08,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:22:08,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:22:08,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 04:22:08,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:22:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1512753331, now seen corresponding path program 1 times [2023-11-29 04:22:08,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:22:08,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275250091] [2023-11-29 04:22:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:22:08,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:22:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:22:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:22:08,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:22:08,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275250091] [2023-11-29 04:22:08,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275250091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:22:08,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:22:08,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 04:22:08,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72907044] [2023-11-29 04:22:08,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:22:08,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:22:08,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:22:08,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:22:08,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:22:08,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2023-11-29 04:22:08,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 239 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2023-11-29 04:22:08,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:22:08,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2023-11-29 04:22:08,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:22:08,575 INFO L124 PetriNetUnfolderBase]: 633/1321 cut-off events. [2023-11-29 04:22:08,575 INFO L125 PetriNetUnfolderBase]: For 467/467 co-relation queries the response was YES. [2023-11-29 04:22:08,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2952 conditions, 1321 events. 633/1321 cut-off events. For 467/467 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 6539 event pairs, 222 based on Foata normal form. 60/1364 useless extension candidates. Maximal degree in co-relation 2825. Up to 607 conditions per place. [2023-11-29 04:22:08,582 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 44 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-11-29 04:22:08,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 317 flow [2023-11-29 04:22:08,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:22:08,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 04:22:08,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2023-11-29 04:22:08,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-29 04:22:08,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 63 transitions. [2023-11-29 04:22:08,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 63 transitions. [2023-11-29 04:22:08,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:22:08,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 63 transitions. [2023-11-29 04:22:08,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-29 04:22:08,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-29 04:22:08,585 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2023-11-29 04:22:08,585 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 239 flow. Second operand 3 states and 63 transitions. [2023-11-29 04:22:08,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 317 flow [2023-11-29 04:22:08,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 56 transitions, 293 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-11-29 04:22:08,595 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 180 flow [2023-11-29 04:22:08,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-29 04:22:08,596 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 17 predicate places. [2023-11-29 04:22:08,596 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 180 flow [2023-11-29 04:22:08,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2023-11-29 04:22:08,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:22:08,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:22:08,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 04:22:08,597 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 04:22:08,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:22:08,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1018894772, now seen corresponding path program 1 times [2023-11-29 04:22:08,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:22:08,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406229400] [2023-11-29 04:22:08,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:22:08,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:22:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:22:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:22:08,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:22:08,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406229400] [2023-11-29 04:22:08,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406229400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:22:08,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:22:08,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 04:22:08,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394242134] [2023-11-29 04:22:08,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:22:08,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:22:08,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:22:08,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:22:08,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 04:22:08,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2023-11-29 04:22:08,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2023-11-29 04:22:08,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:22:08,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2023-11-29 04:22:08,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:22:09,290 INFO L124 PetriNetUnfolderBase]: 699/1437 cut-off events. [2023-11-29 04:22:09,290 INFO L125 PetriNetUnfolderBase]: For 534/534 co-relation queries the response was YES. [2023-11-29 04:22:09,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3322 conditions, 1437 events. 699/1437 cut-off events. For 534/534 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7243 event pairs, 162 based on Foata normal form. 0/1414 useless extension candidates. Maximal degree in co-relation 2922. Up to 902 conditions per place. [2023-11-29 04:22:09,299 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 63 selfloop transitions, 5 changer transitions 3/79 dead transitions. [2023-11-29 04:22:09,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 79 transitions, 418 flow [2023-11-29 04:22:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:22:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 04:22:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2023-11-29 04:22:09,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-29 04:22:09,300 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 105 transitions. [2023-11-29 04:22:09,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 105 transitions. [2023-11-29 04:22:09,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:22:09,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 105 transitions. [2023-11-29 04:22:09,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 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) [2023-11-29 04:22:09,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 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) [2023-11-29 04:22:09,303 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 36.0) internal successors, (216), 6 states have internal predecessors, (216), 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) [2023-11-29 04:22:09,303 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 180 flow. Second operand 5 states and 105 transitions. [2023-11-29 04:22:09,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 79 transitions, 418 flow [2023-11-29 04:22:09,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 79 transitions, 407 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 04:22:09,307 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 212 flow [2023-11-29 04:22:09,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-11-29 04:22:09,308 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 22 predicate places. [2023-11-29 04:22:09,308 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 212 flow [2023-11-29 04:22:09,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 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) [2023-11-29 04:22:09,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:22:09,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:22:09,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 04:22:09,309 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 04:22:09,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:22:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1167501059, now seen corresponding path program 1 times [2023-11-29 04:22:09,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:22:09,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359565928] [2023-11-29 04:22:09,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:22:09,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:22:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:22:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:22:09,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:22:09,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359565928] [2023-11-29 04:22:09,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359565928] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:22:09,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552995322] [2023-11-29 04:22:09,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:22:09,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:22:09,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:22:09,767 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:22:09,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:22:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:22:09,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 04:22:09,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:22:09,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:22:09,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-29 04:22:10,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 32 [2023-11-29 04:22:10,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:22:10,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:22:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:22:10,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552995322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:22:10,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:22:10,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-11-29 04:22:10,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021451736] [2023-11-29 04:22:10,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:22:10,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 04:22:10,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:22:10,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 04:22:10,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-29 04:22:10,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2023-11-29 04:22:10,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 212 flow. Second operand has 15 states, 15 states have (on average 12.133333333333333) internal successors, (182), 15 states have internal predecessors, (182), 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) [2023-11-29 04:22:10,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:22:10,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2023-11-29 04:22:10,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 04:22:11,426 INFO L124 PetriNetUnfolderBase]: 1440/2936 cut-off events. [2023-11-29 04:22:11,426 INFO L125 PetriNetUnfolderBase]: For 1411/1411 co-relation queries the response was YES. [2023-11-29 04:22:11,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6700 conditions, 2936 events. 1440/2936 cut-off events. For 1411/1411 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 15391 event pairs, 234 based on Foata normal form. 6/2894 useless extension candidates. Maximal degree in co-relation 5733. Up to 415 conditions per place. [2023-11-29 04:22:11,448 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 181 selfloop transitions, 38 changer transitions 0/227 dead transitions. [2023-11-29 04:22:11,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 227 transitions, 1208 flow [2023-11-29 04:22:11,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 04:22:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 04:22:11,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 379 transitions. [2023-11-29 04:22:11,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554093567251462 [2023-11-29 04:22:11,451 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 379 transitions. [2023-11-29 04:22:11,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 379 transitions. [2023-11-29 04:22:11,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 04:22:11,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 379 transitions. [2023-11-29 04:22:11,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 19.94736842105263) internal successors, (379), 19 states have internal predecessors, (379), 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) [2023-11-29 04:22:11,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 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) [2023-11-29 04:22:11,457 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 36.0) internal successors, (720), 20 states have internal predecessors, (720), 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) [2023-11-29 04:22:11,457 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 212 flow. Second operand 19 states and 379 transitions. [2023-11-29 04:22:11,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 227 transitions, 1208 flow [2023-11-29 04:22:11,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 227 transitions, 1203 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 04:22:11,466 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 506 flow [2023-11-29 04:22:11,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=506, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2023-11-29 04:22:11,467 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 46 predicate places. [2023-11-29 04:22:11,467 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 506 flow [2023-11-29 04:22:11,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.133333333333333) internal successors, (182), 15 states have internal predecessors, (182), 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) [2023-11-29 04:22:11,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:22:11,468 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:22:11,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:22:11,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:22:11,674 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-29 04:22:11,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:22:11,674 INFO L85 PathProgramCache]: Analyzing trace with hash 954371611, now seen corresponding path program 1 times [2023-11-29 04:22:11,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:22:11,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529454097] [2023-11-29 04:22:11,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:22:11,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:22:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 04:22:11,713 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 04:22:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 04:22:11,764 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 04:22:11,764 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 04:22:11,765 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-11-29 04:22:11,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-11-29 04:22:11,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-29 04:22:11,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-29 04:22:11,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-29 04:22:11,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-29 04:22:11,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 04:22:11,768 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:22:11,774 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-29 04:22:11,774 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 04:22:11,814 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated [2023-11-29 04:22:11,816 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre50 could not be translated [2023-11-29 04:22:11,828 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 04:22:11 BasicIcfg [2023-11-29 04:22:11,828 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 04:22:11,828 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 04:22:11,828 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 04:22:11,829 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 04:22:11,829 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:22:05" (3/4) ... [2023-11-29 04:22:11,830 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-29 04:22:11,846 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated [2023-11-29 04:22:11,847 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre50 could not be translated [2023-11-29 04:22:11,891 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 04:22:11,891 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 04:22:11,892 INFO L158 Benchmark]: Toolchain (without parser) took 7543.60ms. Allocated memory was 157.3MB in the beginning and 226.5MB in the end (delta: 69.2MB). Free memory was 117.7MB in the beginning and 92.3MB in the end (delta: 25.4MB). Peak memory consumption was 96.0MB. Max. memory is 16.1GB. [2023-11-29 04:22:11,892 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 111.1MB. Free memory is still 66.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 04:22:11,892 INFO L158 Benchmark]: CACSL2BoogieTranslator took 593.94ms. Allocated memory is still 157.3MB. Free memory was 117.3MB in the beginning and 87.6MB in the end (delta: 29.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2023-11-29 04:22:11,893 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.04ms. Allocated memory is still 157.3MB. Free memory was 87.6MB in the beginning and 85.1MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 04:22:11,893 INFO L158 Benchmark]: Boogie Preprocessor took 54.10ms. Allocated memory is still 157.3MB. Free memory was 85.1MB in the beginning and 82.1MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 04:22:11,894 INFO L158 Benchmark]: RCFGBuilder took 683.58ms. Allocated memory is still 157.3MB. Free memory was 82.1MB in the beginning and 108.0MB in the end (delta: -25.9MB). Peak memory consumption was 36.2MB. Max. memory is 16.1GB. [2023-11-29 04:22:11,894 INFO L158 Benchmark]: TraceAbstraction took 6092.43ms. Allocated memory was 157.3MB in the beginning and 226.5MB in the end (delta: 69.2MB). Free memory was 107.2MB in the beginning and 100.7MB in the end (delta: 6.5MB). Peak memory consumption was 74.4MB. Max. memory is 16.1GB. [2023-11-29 04:22:11,894 INFO L158 Benchmark]: Witness Printer took 62.64ms. Allocated memory is still 226.5MB. Free memory was 100.7MB in the beginning and 92.3MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-29 04:22:11,896 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 111.1MB. Free memory is still 66.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 593.94ms. Allocated memory is still 157.3MB. Free memory was 117.3MB in the beginning and 87.6MB in the end (delta: 29.7MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.04ms. Allocated memory is still 157.3MB. Free memory was 87.6MB in the beginning and 85.1MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.10ms. Allocated memory is still 157.3MB. Free memory was 85.1MB in the beginning and 82.1MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 683.58ms. Allocated memory is still 157.3MB. Free memory was 82.1MB in the beginning and 108.0MB in the end (delta: -25.9MB). Peak memory consumption was 36.2MB. Max. memory is 16.1GB. * TraceAbstraction took 6092.43ms. Allocated memory was 157.3MB in the beginning and 226.5MB in the end (delta: 69.2MB). Free memory was 107.2MB in the beginning and 100.7MB in the end (delta: 6.5MB). Peak memory consumption was 74.4MB. Max. memory is 16.1GB. * Witness Printer took 62.64ms. Allocated memory is still 226.5MB. Free memory was 100.7MB in the beginning and 92.3MB 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.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre50 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre50 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 940]: 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[(400)]; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={5:0}, m={4:0}, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L990] COND TRUE 1 i<(400) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={5:0}, m={4:0}, top=0] [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) [L967] CALL, EXPR 1 get_top() [L952] 1 return top; [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L1005] COND TRUE 2 i<(400) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1021]: 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: 1022]: 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: 940]: 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, 56 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: 5.9s, OverallIterations: 7, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 616 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 613 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 36 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 998 IncrementalHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 36 mSolverCounterUnsat, 0 mSDtfsCounter, 998 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=506occurred in iteration=6, InterpolantAutomatonStates: 46, 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, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 164 ConstructedInterpolants, 0 QuantifiedInterpolants, 1543 SizeOfPredicates, 16 NumberOfNonLiveVariables, 345 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 0/30 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! [2023-11-29 04:22:11,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49a57711-c8e7-4a15-a8a8-0c0c6049de5c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (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