./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-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_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme --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 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:47:21,230 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:47:21,374 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:47:21,387 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:47:21,388 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:47:21,420 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:47:21,421 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:47:21,422 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:47:21,423 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:47:21,429 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:47:21,429 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:47:21,430 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:47:21,431 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:47:21,433 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:47:21,434 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:47:21,434 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:47:21,435 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:47:21,435 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:47:21,436 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:47:21,436 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:47:21,437 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:47:21,438 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:47:21,438 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:47:21,439 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:47:21,439 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:47:21,440 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:47:21,441 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:47:21,442 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:47:21,442 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:47:21,443 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:47:21,444 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:47:21,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:21,445 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:47:21,445 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:47:21,445 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:47:21,446 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:47:21,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:47:21,446 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:47:21,447 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:47:21,447 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:47:21,447 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:47:21,448 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:47:21,448 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_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 [2023-11-26 10:47:21,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:47:21,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:47:21,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:47:21,872 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:47:21,873 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:47:21,874 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/pthread/stack_longest-1.i [2023-11-26 10:47:24,994 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:47:25,355 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:47:25,358 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/sv-benchmarks/c/pthread/stack_longest-1.i [2023-11-26 10:47:25,380 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/data/fda6fa8c3/1c2aa1e8ada346dca5565b9f30213321/FLAG8a12f97b4 [2023-11-26 10:47:25,398 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/data/fda6fa8c3/1c2aa1e8ada346dca5565b9f30213321 [2023-11-26 10:47:25,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:47:25,402 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:47:25,404 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:25,404 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:47:25,412 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:47:25,413 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:25" (1/1) ... [2023-11-26 10:47:25,415 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f8a6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:25, skipping insertion in model container [2023-11-26 10:47:25,415 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:47:25" (1/1) ... [2023-11-26 10:47:25,492 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:47:26,054 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_29837281-49cb-4a02-96c4-341aea49238b/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2023-11-26 10:47:26,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:26,117 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:47:26,186 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_29837281-49cb-4a02-96c4-341aea49238b/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2023-11-26 10:47:26,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:47:26,314 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:47:26,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:26 WrapperNode [2023-11-26 10:47:26,315 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:47:26,317 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:26,317 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:47:26,318 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:47:26,326 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:26" (1/1) ... [2023-11-26 10:47:26,359 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:26" (1/1) ... [2023-11-26 10:47:26,410 INFO L138 Inliner]: procedures = 278, calls = 41, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 161 [2023-11-26 10:47:26,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:47:26,411 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:47:26,411 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:47:26,412 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:47:26,424 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:26" (1/1) ... [2023-11-26 10:47:26,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:26" (1/1) ... [2023-11-26 10:47:26,443 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:26" (1/1) ... [2023-11-26 10:47:26,468 INFO L175 MemorySlicer]: Split 14 memory accesses to 5 slices as follows [2, 5, 2, 3, 2]. 36 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0, 0, 0]. The 4 writes are split as follows [0, 0, 1, 2, 1]. [2023-11-26 10:47:26,503 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:26" (1/1) ... [2023-11-26 10:47:26,503 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:26" (1/1) ... [2023-11-26 10:47:26,518 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:26" (1/1) ... [2023-11-26 10:47:26,534 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:26" (1/1) ... [2023-11-26 10:47:26,536 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:26" (1/1) ... [2023-11-26 10:47:26,538 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:26" (1/1) ... [2023-11-26 10:47:26,550 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:47:26,551 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:47:26,551 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:47:26,552 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:47:26,552 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:26" (1/1) ... [2023-11-26 10:47:26,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:47:26,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:26,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:47:26,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:47:26,642 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-26 10:47:26,642 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-26 10:47:26,643 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-26 10:47:26,643 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-26 10:47:26,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:47:26,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:47:26,644 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 10:47:26,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:47:26,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:47:26,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:47:26,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:47:26,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 10:47:26,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:47:26,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:47:26,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:47:26,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:47:26,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 10:47:26,646 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 10:47:26,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:47:26,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:47:26,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:47:26,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:47:26,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:47:26,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 10:47:26,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:47:26,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:47:26,649 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:47:26,826 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:47:26,829 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:47:27,160 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:47:27,422 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:47:27,422 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:47:27,423 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:27 BoogieIcfgContainer [2023-11-26 10:47:27,423 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:47:27,425 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:47:27,426 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:47:27,429 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:47:27,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:47:25" (1/3) ... [2023-11-26 10:47:27,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10c29cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:27, skipping insertion in model container [2023-11-26 10:47:27,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:47:26" (2/3) ... [2023-11-26 10:47:27,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10c29cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:47:27, skipping insertion in model container [2023-11-26 10:47:27,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:27" (3/3) ... [2023-11-26 10:47:27,433 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2023-11-26 10:47:27,443 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 10:47:27,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:47:27,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-26 10:47:27,456 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:47:27,513 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 10:47:27,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 36 transitions, 86 flow [2023-11-26 10:47:27,579 INFO L124 PetriNetUnfolderBase]: 5/34 cut-off events. [2023-11-26 10:47:27,580 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 10:47:27,583 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 68 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. [2023-11-26 10:47:27,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 36 transitions, 86 flow [2023-11-26 10:47:27,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 32 transitions, 73 flow [2023-11-26 10:47:27,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:47:27,606 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;@4c42a7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:47:27,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-26 10:47:27,615 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:47:27,616 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2023-11-26 10:47:27,616 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 10:47:27,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:27,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:27,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 10:47:27,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:27,623 INFO L85 PathProgramCache]: Analyzing trace with hash 359551845, now seen corresponding path program 1 times [2023-11-26 10:47:27,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:27,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122435714] [2023-11-26 10:47:27,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:27,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:28,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:28,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122435714] [2023-11-26 10:47:28,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122435714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:28,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:28,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:28,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322220946] [2023-11-26 10:47:28,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:28,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:47:28,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:28,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:47:28,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:47:28,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2023-11-26 10:47:28,290 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) [2023-11-26 10:47:28,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:28,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2023-11-26 10:47:28,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:28,621 INFO L124 PetriNetUnfolderBase]: 360/691 cut-off events. [2023-11-26 10:47:28,622 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-11-26 10:47:28,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1337 conditions, 691 events. 360/691 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3223 event pairs, 82 based on Foata normal form. 46/687 useless extension candidates. Maximal degree in co-relation 1176. Up to 375 conditions per place. [2023-11-26 10:47:28,635 INFO L140 encePairwiseOnDemand]: 30/36 looper letters, 48 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-11-26 10:47:28,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 58 transitions, 236 flow [2023-11-26 10:47:28,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:47:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:47:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2023-11-26 10:47:28,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2023-11-26 10:47:28,651 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 92 transitions. [2023-11-26 10:47:28,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 92 transitions. [2023-11-26 10:47:28,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:28,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 92 transitions. [2023-11-26 10:47:28,658 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) [2023-11-26 10:47:28,661 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) [2023-11-26 10:47:28,662 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) [2023-11-26 10:47:28,664 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 73 flow. Second operand 4 states and 92 transitions. [2023-11-26 10:47:28,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 58 transitions, 236 flow [2023-11-26 10:47:28,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 58 transitions, 227 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 10:47:28,675 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 84 flow [2023-11-26 10:47:28,677 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} [2023-11-26 10:47:28,681 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-11-26 10:47:28,681 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 84 flow [2023-11-26 10:47:28,682 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) [2023-11-26 10:47:28,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:28,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:28,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:47:28,683 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 10:47:28,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:28,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1331876366, now seen corresponding path program 1 times [2023-11-26 10:47:28,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:28,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126477080] [2023-11-26 10:47:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:28,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:28,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:28,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126477080] [2023-11-26 10:47:28,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126477080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:28,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:28,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:47:28,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81319374] [2023-11-26 10:47:28,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:28,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:28,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:28,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:28,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:28,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 36 [2023-11-26 10:47:28,855 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) [2023-11-26 10:47:28,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:28,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 36 [2023-11-26 10:47:28,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:29,053 INFO L124 PetriNetUnfolderBase]: 355/668 cut-off events. [2023-11-26 10:47:29,053 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-11-26 10:47:29,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 668 events. 355/668 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2981 event pairs, 135 based on Foata normal form. 11/636 useless extension candidates. Maximal degree in co-relation 1024. Up to 415 conditions per place. [2023-11-26 10:47:29,064 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 34 selfloop transitions, 2 changer transitions 3/45 dead transitions. [2023-11-26 10:47:29,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 191 flow [2023-11-26 10:47:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:29,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:47:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2023-11-26 10:47:29,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2023-11-26 10:47:29,073 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 64 transitions. [2023-11-26 10:47:29,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 64 transitions. [2023-11-26 10:47:29,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:29,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 64 transitions. [2023-11-26 10:47:29,077 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) [2023-11-26 10:47:29,079 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) [2023-11-26 10:47:29,081 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) [2023-11-26 10:47:29,081 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 84 flow. Second operand 3 states and 64 transitions. [2023-11-26 10:47:29,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 191 flow [2023-11-26 10:47:29,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:47:29,086 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 94 flow [2023-11-26 10:47:29,086 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} [2023-11-26 10:47:29,087 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-11-26 10:47:29,088 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 94 flow [2023-11-26 10:47:29,088 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) [2023-11-26 10:47:29,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:29,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:29,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:47:29,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 10:47:29,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:29,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1211614066, now seen corresponding path program 1 times [2023-11-26 10:47:29,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:29,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459156644] [2023-11-26 10:47:29,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:29,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:29,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:29,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459156644] [2023-11-26 10:47:29,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459156644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:29,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479266778] [2023-11-26 10:47:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:29,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:29,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:29,306 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:29,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:47:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:29,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:47:29,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:29,552 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 [2023-11-26 10:47:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:29,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:29,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479266778] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:29,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:29,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2023-11-26 10:47:29,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557990687] [2023-11-26 10:47:29,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:29,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 10:47:29,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:29,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 10:47:29,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:47:29,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2023-11-26 10:47:29,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 94 flow. Second operand has 13 states, 13 states have (on average 11.538461538461538) internal successors, (150), 13 states have internal predecessors, (150), 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) [2023-11-26 10:47:29,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:29,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2023-11-26 10:47:29,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:30,625 INFO L124 PetriNetUnfolderBase]: 1278/2421 cut-off events. [2023-11-26 10:47:30,625 INFO L125 PetriNetUnfolderBase]: For 244/244 co-relation queries the response was YES. [2023-11-26 10:47:30,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5061 conditions, 2421 events. 1278/2421 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 13250 event pairs, 61 based on Foata normal form. 0/2290 useless extension candidates. Maximal degree in co-relation 4486. Up to 417 conditions per place. [2023-11-26 10:47:30,647 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 169 selfloop transitions, 25 changer transitions 3/205 dead transitions. [2023-11-26 10:47:30,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 205 transitions, 904 flow [2023-11-26 10:47:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 10:47:30,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-26 10:47:30,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 337 transitions. [2023-11-26 10:47:30,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6240740740740741 [2023-11-26 10:47:30,655 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 337 transitions. [2023-11-26 10:47:30,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 337 transitions. [2023-11-26 10:47:30,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:30,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 337 transitions. [2023-11-26 10:47:30,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 22.466666666666665) internal successors, (337), 15 states have internal predecessors, (337), 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) [2023-11-26 10:47:30,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 36.0) internal successors, (576), 16 states have internal predecessors, (576), 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) [2023-11-26 10:47:30,665 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 36.0) internal successors, (576), 16 states have internal predecessors, (576), 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) [2023-11-26 10:47:30,666 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 94 flow. Second operand 15 states and 337 transitions. [2023-11-26 10:47:30,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 205 transitions, 904 flow [2023-11-26 10:47:30,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 205 transitions, 902 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:47:30,675 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 292 flow [2023-11-26 10:47:30,675 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=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=292, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2023-11-26 10:47:30,677 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 24 predicate places. [2023-11-26 10:47:30,678 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 292 flow [2023-11-26 10:47:30,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.538461538461538) internal successors, (150), 13 states have internal predecessors, (150), 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) [2023-11-26 10:47:30,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:30,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:30,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:30,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-26 10:47:30,896 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 10:47:30,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:30,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1937202353, now seen corresponding path program 1 times [2023-11-26 10:47:30,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:30,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128552854] [2023-11-26 10:47:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:30,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:31,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:31,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128552854] [2023-11-26 10:47:31,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128552854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:31,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:31,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:47:31,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771780917] [2023-11-26 10:47:31,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:31,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:47:31,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:31,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:47:31,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:47:31,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2023-11-26 10:47:31,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 292 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) [2023-11-26 10:47:31,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:31,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2023-11-26 10:47:31,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:31,371 INFO L124 PetriNetUnfolderBase]: 730/1507 cut-off events. [2023-11-26 10:47:31,372 INFO L125 PetriNetUnfolderBase]: For 644/644 co-relation queries the response was YES. [2023-11-26 10:47:31,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3381 conditions, 1507 events. 730/1507 cut-off events. For 644/644 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 7424 event pairs, 253 based on Foata normal form. 72/1548 useless extension candidates. Maximal degree in co-relation 3252. Up to 713 conditions per place. [2023-11-26 10:47:31,385 INFO L140 encePairwiseOnDemand]: 32/36 looper letters, 48 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-11-26 10:47:31,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 356 flow [2023-11-26 10:47:31,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:47:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:47:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2023-11-26 10:47:31,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-26 10:47:31,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 63 transitions. [2023-11-26 10:47:31,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 63 transitions. [2023-11-26 10:47:31,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:31,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 63 transitions. [2023-11-26 10:47:31,387 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) [2023-11-26 10:47:31,388 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) [2023-11-26 10:47:31,389 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) [2023-11-26 10:47:31,390 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 292 flow. Second operand 3 states and 63 transitions. [2023-11-26 10:47:31,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 356 flow [2023-11-26 10:47:31,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 322 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-11-26 10:47:31,408 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 201 flow [2023-11-26 10:47:31,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-11-26 10:47:31,410 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2023-11-26 10:47:31,410 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 201 flow [2023-11-26 10:47:31,411 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) [2023-11-26 10:47:31,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:31,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:31,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:47:31,415 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 10:47:31,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:31,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1492323094, now seen corresponding path program 1 times [2023-11-26 10:47:31,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:31,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87225931] [2023-11-26 10:47:31,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:31,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:31,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:31,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87225931] [2023-11-26 10:47:31,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87225931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:47:31,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:47:31,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:47:31,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337368948] [2023-11-26 10:47:31,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:47:31,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:47:31,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:31,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:47:31,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:47:31,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2023-11-26 10:47:31,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 201 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) [2023-11-26 10:47:31,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:31,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2023-11-26 10:47:31,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:32,347 INFO L124 PetriNetUnfolderBase]: 794/1619 cut-off events. [2023-11-26 10:47:32,347 INFO L125 PetriNetUnfolderBase]: For 610/610 co-relation queries the response was YES. [2023-11-26 10:47:32,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3732 conditions, 1619 events. 794/1619 cut-off events. For 610/610 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 8177 event pairs, 192 based on Foata normal form. 0/1582 useless extension candidates. Maximal degree in co-relation 3525. Up to 1059 conditions per place. [2023-11-26 10:47:32,361 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 67 selfloop transitions, 5 changer transitions 3/83 dead transitions. [2023-11-26 10:47:32,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 83 transitions, 447 flow [2023-11-26 10:47:32,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:47:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:47:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2023-11-26 10:47:32,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-11-26 10:47:32,363 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 105 transitions. [2023-11-26 10:47:32,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 105 transitions. [2023-11-26 10:47:32,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:32,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 105 transitions. [2023-11-26 10:47:32,364 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) [2023-11-26 10:47:32,364 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) [2023-11-26 10:47:32,365 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) [2023-11-26 10:47:32,365 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 201 flow. Second operand 5 states and 105 transitions. [2023-11-26 10:47:32,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 83 transitions, 447 flow [2023-11-26 10:47:32,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 83 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:47:32,371 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 233 flow [2023-11-26 10:47:32,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2023-11-26 10:47:32,372 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 25 predicate places. [2023-11-26 10:47:32,372 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 233 flow [2023-11-26 10:47:32,372 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) [2023-11-26 10:47:32,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:32,372 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:32,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:47:32,373 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 10:47:32,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:32,373 INFO L85 PathProgramCache]: Analyzing trace with hash 376594137, now seen corresponding path program 1 times [2023-11-26 10:47:32,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:32,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301028792] [2023-11-26 10:47:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:32,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:33,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:47:33,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301028792] [2023-11-26 10:47:33,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301028792] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:47:33,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632528993] [2023-11-26 10:47:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:33,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:47:33,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:47:33,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:47:33,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:47:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:47:33,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-26 10:47:33,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:47:33,325 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 [2023-11-26 10:47:33,405 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 [2023-11-26 10:47:33,531 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 [2023-11-26 10:47:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:33,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:47:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:47:33,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632528993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:47:33,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:47:33,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-11-26 10:47:33,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629798783] [2023-11-26 10:47:33,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:47:33,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:47:33,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:47:33,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:47:33,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:47:33,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 36 [2023-11-26 10:47:33,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 233 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) [2023-11-26 10:47:33,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:47:33,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 36 [2023-11-26 10:47:33,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:47:35,501 INFO L124 PetriNetUnfolderBase]: 1990/4047 cut-off events. [2023-11-26 10:47:35,501 INFO L125 PetriNetUnfolderBase]: For 2092/2092 co-relation queries the response was YES. [2023-11-26 10:47:35,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9266 conditions, 4047 events. 1990/4047 cut-off events. For 2092/2092 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 23480 event pairs, 262 based on Foata normal form. 6/3995 useless extension candidates. Maximal degree in co-relation 7924. Up to 567 conditions per place. [2023-11-26 10:47:35,540 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 222 selfloop transitions, 55 changer transitions 0/285 dead transitions. [2023-11-26 10:47:35,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 285 transitions, 1554 flow [2023-11-26 10:47:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-26 10:47:35,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-26 10:47:35,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 452 transitions. [2023-11-26 10:47:35,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707070707070707 [2023-11-26 10:47:35,544 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 452 transitions. [2023-11-26 10:47:35,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 452 transitions. [2023-11-26 10:47:35,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:47:35,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 452 transitions. [2023-11-26 10:47:35,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 20.545454545454547) internal successors, (452), 22 states have internal predecessors, (452), 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) [2023-11-26 10:47:35,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2023-11-26 10:47:35,550 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 36.0) internal successors, (828), 23 states have internal predecessors, (828), 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) [2023-11-26 10:47:35,550 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 233 flow. Second operand 22 states and 452 transitions. [2023-11-26 10:47:35,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 285 transitions, 1554 flow [2023-11-26 10:47:35,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 285 transitions, 1549 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:47:35,565 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 642 flow [2023-11-26 10:47:35,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=642, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2023-11-26 10:47:35,566 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 54 predicate places. [2023-11-26 10:47:35,567 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 642 flow [2023-11-26 10:47:35,567 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) [2023-11-26 10:47:35,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:47:35,567 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] [2023-11-26 10:47:35,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:47:35,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 10:47:35,774 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-26 10:47:35,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:47:35,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2073443491, now seen corresponding path program 1 times [2023-11-26 10:47:35,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:47:35,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332974627] [2023-11-26 10:47:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:47:35,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:47:35,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:47:35,823 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 10:47:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:47:35,887 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 10:47:35,887 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 10:47:35,889 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-11-26 10:47:35,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-11-26 10:47:35,891 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-26 10:47:35,892 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-26 10:47:35,892 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-26 10:47:35,892 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-26 10:47:35,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:47:35,892 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:47:35,905 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-26 10:47:35,905 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 10:47:35,963 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated [2023-11-26 10:47:35,965 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre50 could not be translated [2023-11-26 10:47:35,984 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 10:47:35 BasicIcfg [2023-11-26 10:47:35,984 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 10:47:35,985 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 10:47:35,985 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 10:47:35,985 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 10:47:35,986 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:47:27" (3/4) ... [2023-11-26 10:47:35,987 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-26 10:47:36,017 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre48 could not be translated [2023-11-26 10:47:36,021 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre50 could not be translated [2023-11-26 10:47:36,087 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 10:47:36,088 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 10:47:36,088 INFO L158 Benchmark]: Toolchain (without parser) took 10686.13ms. Allocated memory was 144.7MB in the beginning and 272.6MB in the end (delta: 127.9MB). Free memory was 98.4MB in the beginning and 97.0MB in the end (delta: 1.3MB). Peak memory consumption was 130.9MB. Max. memory is 16.1GB. [2023-11-26 10:47:36,089 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 144.7MB. Free memory is still 119.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 10:47:36,089 INFO L158 Benchmark]: CACSL2BoogieTranslator took 911.82ms. Allocated memory is still 144.7MB. Free memory was 98.4MB in the beginning and 68.6MB in the end (delta: 29.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2023-11-26 10:47:36,089 INFO L158 Benchmark]: Boogie Procedure Inliner took 94.10ms. Allocated memory is still 144.7MB. Free memory was 68.6MB in the beginning and 65.7MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-26 10:47:36,090 INFO L158 Benchmark]: Boogie Preprocessor took 139.10ms. Allocated memory is still 144.7MB. Free memory was 65.7MB in the beginning and 114.2MB in the end (delta: -48.4MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2023-11-26 10:47:36,090 INFO L158 Benchmark]: RCFGBuilder took 872.35ms. Allocated memory is still 144.7MB. Free memory was 114.1MB in the beginning and 72.6MB in the end (delta: 41.5MB). Peak memory consumption was 45.1MB. Max. memory is 16.1GB. [2023-11-26 10:47:36,091 INFO L158 Benchmark]: TraceAbstraction took 8559.08ms. Allocated memory was 144.7MB in the beginning and 272.6MB in the end (delta: 127.9MB). Free memory was 71.7MB in the beginning and 105.4MB in the end (delta: -33.7MB). Peak memory consumption was 93.0MB. Max. memory is 16.1GB. [2023-11-26 10:47:36,091 INFO L158 Benchmark]: Witness Printer took 102.82ms. Allocated memory is still 272.6MB. Free memory was 105.4MB in the beginning and 97.0MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-26 10:47:36,094 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 144.7MB. Free memory is still 119.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 911.82ms. Allocated memory is still 144.7MB. Free memory was 98.4MB in the beginning and 68.6MB in the end (delta: 29.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 94.10ms. Allocated memory is still 144.7MB. Free memory was 68.6MB in the beginning and 65.7MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 139.10ms. Allocated memory is still 144.7MB. Free memory was 65.7MB in the beginning and 114.2MB in the end (delta: -48.4MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. * RCFGBuilder took 872.35ms. Allocated memory is still 144.7MB. Free memory was 114.1MB in the beginning and 72.6MB in the end (delta: 41.5MB). Peak memory consumption was 45.1MB. Max. memory is 16.1GB. * TraceAbstraction took 8559.08ms. Allocated memory was 144.7MB in the beginning and 272.6MB in the end (delta: 127.9MB). Free memory was 71.7MB in the beginning and 105.4MB in the end (delta: -33.7MB). Peak memory consumption was 93.0MB. Max. memory is 16.1GB. * Witness Printer took 102.82ms. Allocated memory is still 272.6MB. Free memory was 105.4MB in the beginning and 97.0MB 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: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(800)]; [L936] 0 static unsigned int arr[(800)]; [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); [L1020] 0 pthread_t id1, id2; [L1022] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={5:0}, id2={6:0}, m={4:0}, top=0] [L989] 1 int i; [L990] 1 unsigned int tmp; [L991] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L991] COND TRUE 1 i<(800) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1023] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={5:0}, id2={6:0}, m={4:0}, top=0] [L1005] 2 int i; [L1006] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L994] 1 tmp = __VERIFIER_nondet_uint() [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L23] COND FALSE 1 !(!cond) [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L961] COND FALSE 1 !(top==(800)) [L968] CALL, EXPR 1 get_top() [L953] 1 return top; [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x [L969] CALL 1 inc_top() [L945] 1 top++ [L969] RET 1 inc_top() [L971] 1 return 0; [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) [L998] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L1006] COND TRUE 2 i<(800) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) [L982] CALL 2 dec_top() [L949] 2 top-- [L982] RET 2 dec_top() [L983] CALL, EXPR 2 get_top() [L953] 2 return top; [L983] RET, EXPR 2 get_top() [L983] EXPR 2 stack[get_top()] [L983] 2 return stack[get_top()]; [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1006] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1006] COND TRUE 2 i<(800) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 [L978] 2 return (-2); [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) [L1012] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 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: 941]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 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: 8.3s, OverallIterations: 7, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 736 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 733 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 49 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1181 IncrementalHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 49 mSolverCounterUnsat, 0 mSDtfsCounter, 1181 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=642occurred in iteration=6, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.9s InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 164 ConstructedInterpolants, 0 QuantifiedInterpolants, 1566 SizeOfPredicates, 16 NumberOfNonLiveVariables, 345 ConjunctsInSsa, 24 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! [2023-11-26 10:47:36,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29837281-49cb-4a02-96c4-341aea49238b/bin/uautomizer-verify-VRDe98Ueme/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