./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7be9b237ca4111a24c77c67cce26f31a788af03984af96dee7353f79c789c2c1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:51:29,137 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:51:29,225 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-28 23:51:29,230 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:51:29,231 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:51:29,254 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:51:29,254 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:51:29,255 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:51:29,256 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:51:29,256 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:51:29,257 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:51:29,257 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:51:29,258 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:51:29,259 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:51:29,259 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:51:29,260 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:51:29,260 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 23:51:29,261 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:51:29,261 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:51:29,262 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:51:29,262 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:51:29,263 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 23:51:29,263 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:51:29,263 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 23:51:29,264 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-28 23:51:29,264 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 23:51:29,264 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:51:29,265 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:51:29,265 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:51:29,266 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:51:29,266 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:51:29,266 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:51:29,267 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:51:29,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:51:29,267 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:51:29,267 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:51:29,267 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 23:51:29,268 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:51:29,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:51:29,268 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:51:29,268 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:51:29,269 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 23:51:29,269 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:51:29,269 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:51:29,269 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_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7be9b237ca4111a24c77c67cce26f31a788af03984af96dee7353f79c789c2c1 [2023-11-28 23:51:29,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:51:29,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:51:29,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:51:29,549 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:51:29,549 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:51:29,551 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2023-11-28 23:51:32,269 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:51:32,557 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:51:32,558 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2023-11-28 23:51:32,577 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/data/f108fb78d/0b73e40f77d3400887e8a35d6dbdb9b0/FLAG47d80e3b7 [2023-11-28 23:51:32,592 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/data/f108fb78d/0b73e40f77d3400887e8a35d6dbdb9b0 [2023-11-28 23:51:32,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:51:32,596 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:51:32,597 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:51:32,598 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:51:32,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:51:32,603 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:32,604 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@407a726f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:32, skipping insertion in model container [2023-11-28 23:51:32,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:51:32" (1/1) ... [2023-11-28 23:51:32,656 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:51:33,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:51:33,253 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:51:33,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:51:33,361 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:51:33,362 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:33 WrapperNode [2023-11-28 23:51:33,362 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:51:33,363 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:51:33,363 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:51:33,363 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:51:33,369 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:33" (1/1) ... [2023-11-28 23:51:33,390 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:33" (1/1) ... [2023-11-28 23:51:33,421 INFO L138 Inliner]: procedures = 279, calls = 69, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 275 [2023-11-28 23:51:33,422 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:51:33,423 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:51:33,423 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:51:33,423 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:51:33,433 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:33" (1/1) ... [2023-11-28 23:51:33,433 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:33" (1/1) ... [2023-11-28 23:51:33,440 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:33" (1/1) ... [2023-11-28 23:51:33,461 INFO L175 MemorySlicer]: Split 35 memory accesses to 8 slices as follows [2, 2, 14, 5, 4, 5, 1, 2]. 40 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 0, 0, 5, 0, 5, 0, 0]. The 13 writes are split as follows [0, 1, 8, 0, 2, 0, 1, 1]. [2023-11-28 23:51:33,462 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:33" (1/1) ... [2023-11-28 23:51:33,462 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:33" (1/1) ... [2023-11-28 23:51:33,475 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:33" (1/1) ... [2023-11-28 23:51:33,480 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:33" (1/1) ... [2023-11-28 23:51:33,485 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:33" (1/1) ... [2023-11-28 23:51:33,488 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:33" (1/1) ... [2023-11-28 23:51:33,495 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:51:33,496 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:51:33,496 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:51:33,496 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:51:33,497 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:33" (1/1) ... [2023-11-28 23:51:33,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:51:33,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:51:33,539 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:51:33,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:51:33,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 23:51:33,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-28 23:51:33,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-28 23:51:33,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-28 23:51:33,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-28 23:51:33,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-28 23:51:33,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-28 23:51:33,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2023-11-28 23:51:33,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2023-11-28 23:51:33,587 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-28 23:51:33,588 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-28 23:51:33,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 23:51:33,588 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-28 23:51:33,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 23:51:33,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 23:51:33,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 23:51:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-28 23:51:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-28 23:51:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-28 23:51:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-28 23:51:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-28 23:51:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-28 23:51:33,590 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-28 23:51:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 23:51:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 23:51:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 23:51:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-28 23:51:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-28 23:51:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-28 23:51:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-28 23:51:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-28 23:51:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-28 23:51:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-28 23:51:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:51:33,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-28 23:51:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-28 23:51:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-28 23:51:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-28 23:51:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-28 23:51:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-28 23:51:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2023-11-28 23:51:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2023-11-28 23:51:33,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:51:33,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 23:51:33,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 23:51:33,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-28 23:51:33,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-28 23:51:33,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-28 23:51:33,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-28 23:51:33,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-28 23:51:33,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:51:33,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:51:33,596 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 23:51:33,799 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:51:33,801 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:51:34,192 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:51:34,489 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:51:34,489 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-28 23:51:34,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:51:34 BoogieIcfgContainer [2023-11-28 23:51:34,490 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:51:34,492 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:51:34,492 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:51:34,496 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:51:34,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:51:32" (1/3) ... [2023-11-28 23:51:34,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ee13d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:51:34, skipping insertion in model container [2023-11-28 23:51:34,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:51:33" (2/3) ... [2023-11-28 23:51:34,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ee13d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:51:34, skipping insertion in model container [2023-11-28 23:51:34,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:51:34" (3/3) ... [2023-11-28 23:51:34,499 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2023-11-28 23:51:34,509 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-28 23:51:34,520 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:51:34,520 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-11-28 23:51:34,521 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 23:51:34,597 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-28 23:51:34,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 100 transitions, 220 flow [2023-11-28 23:51:34,703 INFO L124 PetriNetUnfolderBase]: 35/203 cut-off events. [2023-11-28 23:51:34,704 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-28 23:51:34,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 203 events. 35/203 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 821 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 99. Up to 8 conditions per place. [2023-11-28 23:51:34,710 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 100 transitions, 220 flow [2023-11-28 23:51:34,716 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 100 transitions, 220 flow [2023-11-28 23:51:34,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:51:34,734 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;@10853d81, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:51:34,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-28 23:51:34,739 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:51:34,739 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-28 23:51:34,740 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:51:34,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:34,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 23:51:34,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-28 23:51:34,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:34,747 INFO L85 PathProgramCache]: Analyzing trace with hash 726500, now seen corresponding path program 1 times [2023-11-28 23:51:34,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:34,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243721629] [2023-11-28 23:51:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:34,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:35,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:35,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243721629] [2023-11-28 23:51:35,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243721629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:35,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:35,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:51:35,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815736476] [2023-11-28 23:51:35,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:35,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:51:35,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:35,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:51:35,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:51:35,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 100 [2023-11-28 23:51:35,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 100 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2023-11-28 23:51:35,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:35,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 100 [2023-11-28 23:51:35,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:36,205 INFO L124 PetriNetUnfolderBase]: 2836/5779 cut-off events. [2023-11-28 23:51:36,205 INFO L125 PetriNetUnfolderBase]: For 155/155 co-relation queries the response was YES. [2023-11-28 23:51:36,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10418 conditions, 5779 events. 2836/5779 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 38925 event pairs, 2635 based on Foata normal form. 403/5298 useless extension candidates. Maximal degree in co-relation 8655. Up to 4552 conditions per place. [2023-11-28 23:51:36,281 INFO L140 encePairwiseOnDemand]: 83/100 looper letters, 57 selfloop transitions, 3 changer transitions 0/91 dead transitions. [2023-11-28 23:51:36,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 322 flow [2023-11-28 23:51:36,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:51:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:51:36,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 198 transitions. [2023-11-28 23:51:36,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2023-11-28 23:51:36,293 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 198 transitions. [2023-11-28 23:51:36,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 198 transitions. [2023-11-28 23:51:36,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:36,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 198 transitions. [2023-11-28 23:51:36,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 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) [2023-11-28 23:51:36,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 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) [2023-11-28 23:51:36,304 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 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) [2023-11-28 23:51:36,306 INFO L175 Difference]: Start difference. First operand has 87 places, 100 transitions, 220 flow. Second operand 4 states and 198 transitions. [2023-11-28 23:51:36,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 322 flow [2023-11-28 23:51:36,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 322 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 23:51:36,315 INFO L231 Difference]: Finished difference. Result has 92 places, 91 transitions, 222 flow [2023-11-28 23:51:36,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=92, PETRI_TRANSITIONS=91} [2023-11-28 23:51:36,321 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2023-11-28 23:51:36,321 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 91 transitions, 222 flow [2023-11-28 23:51:36,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2023-11-28 23:51:36,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:36,322 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-28 23:51:36,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 23:51:36,323 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-28 23:51:36,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash 169062091, now seen corresponding path program 1 times [2023-11-28 23:51:36,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:36,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496037137] [2023-11-28 23:51:36,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:36,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:36,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:36,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496037137] [2023-11-28 23:51:36,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496037137] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:51:36,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237084264] [2023-11-28 23:51:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:36,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:51:36,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:51:36,465 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:51:36,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 23:51:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:36,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 23:51:36,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:51:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:36,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:51:36,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237084264] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:36,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 23:51:36,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2023-11-28 23:51:36,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948873902] [2023-11-28 23:51:36,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:36,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:51:36,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:36,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:51:36,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-28 23:51:36,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 100 [2023-11-28 23:51:36,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 91 transitions, 222 flow. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 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) [2023-11-28 23:51:36,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:36,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 100 [2023-11-28 23:51:36,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:37,571 INFO L124 PetriNetUnfolderBase]: 2836/5778 cut-off events. [2023-11-28 23:51:37,572 INFO L125 PetriNetUnfolderBase]: For 155/155 co-relation queries the response was YES. [2023-11-28 23:51:37,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10430 conditions, 5778 events. 2836/5778 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 38887 event pairs, 2635 based on Foata normal form. 1/4895 useless extension candidates. Maximal degree in co-relation 10410. Up to 4547 conditions per place. [2023-11-28 23:51:37,605 INFO L140 encePairwiseOnDemand]: 95/100 looper letters, 54 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2023-11-28 23:51:37,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 90 transitions, 338 flow [2023-11-28 23:51:37,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:51:37,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:51:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 179 transitions. [2023-11-28 23:51:37,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475 [2023-11-28 23:51:37,608 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 179 transitions. [2023-11-28 23:51:37,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 179 transitions. [2023-11-28 23:51:37,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:37,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 179 transitions. [2023-11-28 23:51:37,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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) [2023-11-28 23:51:37,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 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) [2023-11-28 23:51:37,612 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 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) [2023-11-28 23:51:37,612 INFO L175 Difference]: Start difference. First operand has 92 places, 91 transitions, 222 flow. Second operand 4 states and 179 transitions. [2023-11-28 23:51:37,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 90 transitions, 338 flow [2023-11-28 23:51:37,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 90 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 23:51:37,617 INFO L231 Difference]: Finished difference. Result has 93 places, 90 transitions, 228 flow [2023-11-28 23:51:37,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=93, PETRI_TRANSITIONS=90} [2023-11-28 23:51:37,618 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 6 predicate places. [2023-11-28 23:51:37,618 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 90 transitions, 228 flow [2023-11-28 23:51:37,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 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) [2023-11-28 23:51:37,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:37,619 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-28 23:51:37,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:51:37,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-28 23:51:37,820 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-28 23:51:37,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:37,820 INFO L85 PathProgramCache]: Analyzing trace with hash 945958267, now seen corresponding path program 1 times [2023-11-28 23:51:37,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:37,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626827270] [2023-11-28 23:51:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:37,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:51:37,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:37,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626827270] [2023-11-28 23:51:37,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626827270] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:37,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:37,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:51:37,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457372210] [2023-11-28 23:51:37,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:37,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:51:37,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:37,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:51:37,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:51:37,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 100 [2023-11-28 23:51:37,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 90 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2023-11-28 23:51:37,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:37,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 100 [2023-11-28 23:51:37,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:38,689 INFO L124 PetriNetUnfolderBase]: 2836/5777 cut-off events. [2023-11-28 23:51:38,689 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2023-11-28 23:51:38,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10430 conditions, 5777 events. 2836/5777 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 38899 event pairs, 2635 based on Foata normal form. 1/4895 useless extension candidates. Maximal degree in co-relation 10405. Up to 4550 conditions per place. [2023-11-28 23:51:38,729 INFO L140 encePairwiseOnDemand]: 97/100 looper letters, 54 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2023-11-28 23:51:38,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 340 flow [2023-11-28 23:51:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:51:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 23:51:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2023-11-28 23:51:38,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-28 23:51:38,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2023-11-28 23:51:38,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2023-11-28 23:51:38,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:38,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2023-11-28 23:51:38,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 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) [2023-11-28 23:51:38,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2023-11-28 23:51:38,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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) [2023-11-28 23:51:38,735 INFO L175 Difference]: Start difference. First operand has 93 places, 90 transitions, 228 flow. Second operand 3 states and 150 transitions. [2023-11-28 23:51:38,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 340 flow [2023-11-28 23:51:38,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 89 transitions, 328 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-28 23:51:38,739 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 220 flow [2023-11-28 23:51:38,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2023-11-28 23:51:38,741 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 4 predicate places. [2023-11-28 23:51:38,741 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 220 flow [2023-11-28 23:51:38,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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) [2023-11-28 23:51:38,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:38,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:38,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 23:51:38,742 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-28 23:51:38,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:38,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1465889604, now seen corresponding path program 1 times [2023-11-28 23:51:38,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:38,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791083788] [2023-11-28 23:51:38,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:38,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:38,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:38,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791083788] [2023-11-28 23:51:38,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791083788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:51:38,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341363611] [2023-11-28 23:51:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:38,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:51:38,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:51:38,830 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:51:38,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 23:51:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:38,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 23:51:38,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:51:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:39,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:51:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:51:39,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341363611] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:51:39,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:51:39,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-28 23:51:39,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46690113] [2023-11-28 23:51:39,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:51:39,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 23:51:39,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:39,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 23:51:39,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-28 23:51:39,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 100 [2023-11-28 23:51:39,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 220 flow. Second operand has 10 states, 10 states have (on average 32.4) internal successors, (324), 10 states have internal predecessors, (324), 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) [2023-11-28 23:51:39,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:39,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 100 [2023-11-28 23:51:39,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:40,129 INFO L124 PetriNetUnfolderBase]: 2836/5781 cut-off events. [2023-11-28 23:51:40,129 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2023-11-28 23:51:40,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10441 conditions, 5781 events. 2836/5781 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 38926 event pairs, 2635 based on Foata normal form. 2/4901 useless extension candidates. Maximal degree in co-relation 10403. Up to 4548 conditions per place. [2023-11-28 23:51:40,169 INFO L140 encePairwiseOnDemand]: 96/100 looper letters, 54 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2023-11-28 23:51:40,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 92 transitions, 360 flow [2023-11-28 23:51:40,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 23:51:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-28 23:51:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 280 transitions. [2023-11-28 23:51:40,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-28 23:51:40,174 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 280 transitions. [2023-11-28 23:51:40,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 280 transitions. [2023-11-28 23:51:40,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:40,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 280 transitions. [2023-11-28 23:51:40,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 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) [2023-11-28 23:51:40,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 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) [2023-11-28 23:51:40,179 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 100.0) internal successors, (800), 8 states have internal predecessors, (800), 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) [2023-11-28 23:51:40,179 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 220 flow. Second operand 7 states and 280 transitions. [2023-11-28 23:51:40,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 92 transitions, 360 flow [2023-11-28 23:51:40,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 92 transitions, 346 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 23:51:40,185 INFO L231 Difference]: Finished difference. Result has 97 places, 92 transitions, 249 flow [2023-11-28 23:51:40,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=249, PETRI_PLACES=97, PETRI_TRANSITIONS=92} [2023-11-28 23:51:40,186 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 10 predicate places. [2023-11-28 23:51:40,186 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 92 transitions, 249 flow [2023-11-28 23:51:40,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 32.4) internal successors, (324), 10 states have internal predecessors, (324), 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) [2023-11-28 23:51:40,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:40,187 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:40,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-28 23:51:40,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:51:40,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-28 23:51:40,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:40,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1140709212, now seen corresponding path program 2 times [2023-11-28 23:51:40,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:40,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165882656] [2023-11-28 23:51:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:40,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-28 23:51:40,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:40,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165882656] [2023-11-28 23:51:40,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165882656] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:51:40,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:51:40,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:51:40,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251668893] [2023-11-28 23:51:40,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:51:40,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:51:40,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:40,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:51:40,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:51:40,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 100 [2023-11-28 23:51:40,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 92 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2023-11-28 23:51:40,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:40,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 100 [2023-11-28 23:51:40,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:41,239 INFO L124 PetriNetUnfolderBase]: 2730/5508 cut-off events. [2023-11-28 23:51:41,240 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-11-28 23:51:41,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9969 conditions, 5508 events. 2730/5508 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 36227 event pairs, 1368 based on Foata normal form. 6/4687 useless extension candidates. Maximal degree in co-relation 9926. Up to 4332 conditions per place. [2023-11-28 23:51:41,276 INFO L140 encePairwiseOnDemand]: 94/100 looper letters, 69 selfloop transitions, 3 changer transitions 0/101 dead transitions. [2023-11-28 23:51:41,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 101 transitions, 411 flow [2023-11-28 23:51:41,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:51:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 23:51:41,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 194 transitions. [2023-11-28 23:51:41,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.485 [2023-11-28 23:51:41,278 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 194 transitions. [2023-11-28 23:51:41,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 194 transitions. [2023-11-28 23:51:41,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:41,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 194 transitions. [2023-11-28 23:51:41,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 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) [2023-11-28 23:51:41,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 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) [2023-11-28 23:51:41,281 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 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) [2023-11-28 23:51:41,282 INFO L175 Difference]: Start difference. First operand has 97 places, 92 transitions, 249 flow. Second operand 4 states and 194 transitions. [2023-11-28 23:51:41,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 101 transitions, 411 flow [2023-11-28 23:51:41,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 101 transitions, 397 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-28 23:51:41,286 INFO L231 Difference]: Finished difference. Result has 96 places, 90 transitions, 241 flow [2023-11-28 23:51:41,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=96, PETRI_TRANSITIONS=90} [2023-11-28 23:51:41,287 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 9 predicate places. [2023-11-28 23:51:41,287 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 90 transitions, 241 flow [2023-11-28 23:51:41,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2023-11-28 23:51:41,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:41,288 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:41,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 23:51:41,288 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-28 23:51:41,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:41,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1087664861, now seen corresponding path program 1 times [2023-11-28 23:51:41,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:41,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701490689] [2023-11-28 23:51:41,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:41,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:51:41,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:41,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701490689] [2023-11-28 23:51:41,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701490689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:51:41,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086252825] [2023-11-28 23:51:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:41,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:51:41,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:51:41,479 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:51:41,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 23:51:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:41,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 23:51:41,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:51:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:51:41,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:51:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:51:41,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086252825] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:51:41,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:51:41,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-28 23:51:41,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768399575] [2023-11-28 23:51:41,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:51:41,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-28 23:51:41,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:41,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-28 23:51:41,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-28 23:51:41,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 100 [2023-11-28 23:51:41,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 90 transitions, 241 flow. Second operand has 18 states, 18 states have (on average 32.27777777777778) internal successors, (581), 18 states have internal predecessors, (581), 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) [2023-11-28 23:51:41,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:41,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 100 [2023-11-28 23:51:41,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:42,771 INFO L124 PetriNetUnfolderBase]: 2730/5510 cut-off events. [2023-11-28 23:51:42,771 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2023-11-28 23:51:42,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10014 conditions, 5510 events. 2730/5510 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 36124 event pairs, 2563 based on Foata normal form. 4/4692 useless extension candidates. Maximal degree in co-relation 9937. Up to 4344 conditions per place. [2023-11-28 23:51:42,798 INFO L140 encePairwiseOnDemand]: 96/100 looper letters, 54 selfloop transitions, 15 changer transitions 0/98 dead transitions. [2023-11-28 23:51:42,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 98 transitions, 427 flow [2023-11-28 23:51:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 23:51:42,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-28 23:51:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 538 transitions. [2023-11-28 23:51:42,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3586666666666667 [2023-11-28 23:51:42,801 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 538 transitions. [2023-11-28 23:51:42,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 538 transitions. [2023-11-28 23:51:42,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:42,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 538 transitions. [2023-11-28 23:51:42,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 35.86666666666667) internal successors, (538), 15 states have internal predecessors, (538), 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) [2023-11-28 23:51:42,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 100.0) internal successors, (1600), 16 states have internal predecessors, (1600), 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) [2023-11-28 23:51:42,806 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 100.0) internal successors, (1600), 16 states have internal predecessors, (1600), 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) [2023-11-28 23:51:42,806 INFO L175 Difference]: Start difference. First operand has 96 places, 90 transitions, 241 flow. Second operand 15 states and 538 transitions. [2023-11-28 23:51:42,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 98 transitions, 427 flow [2023-11-28 23:51:42,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 98 transitions, 421 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-28 23:51:42,810 INFO L231 Difference]: Finished difference. Result has 111 places, 98 transitions, 332 flow [2023-11-28 23:51:42,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=332, PETRI_PLACES=111, PETRI_TRANSITIONS=98} [2023-11-28 23:51:42,810 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 24 predicate places. [2023-11-28 23:51:42,811 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 98 transitions, 332 flow [2023-11-28 23:51:42,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 32.27777777777778) internal successors, (581), 18 states have internal predecessors, (581), 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) [2023-11-28 23:51:42,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:42,811 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:42,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 23:51:43,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:51:43,012 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-28 23:51:43,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:43,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1631535715, now seen corresponding path program 2 times [2023-11-28 23:51:43,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:43,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088642279] [2023-11-28 23:51:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:43,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:51:43,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:43,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088642279] [2023-11-28 23:51:43,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088642279] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:51:43,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601420584] [2023-11-28 23:51:43,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:51:43,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:51:43,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:51:43,552 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:51:43,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 23:51:43,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:51:43,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:51:43,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 23:51:43,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:51:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:51:43,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:51:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:51:44,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601420584] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:51:44,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 23:51:44,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2023-11-28 23:51:44,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199479537] [2023-11-28 23:51:44,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 23:51:44,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-28 23:51:44,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:51:44,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-28 23:51:44,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2023-11-28 23:51:44,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 100 [2023-11-28 23:51:44,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 98 transitions, 332 flow. Second operand has 34 states, 34 states have (on average 32.14705882352941) internal successors, (1093), 34 states have internal predecessors, (1093), 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) [2023-11-28 23:51:44,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:51:44,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 100 [2023-11-28 23:51:44,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:51:45,320 INFO L124 PetriNetUnfolderBase]: 2730/5534 cut-off events. [2023-11-28 23:51:45,320 INFO L125 PetriNetUnfolderBase]: For 362/362 co-relation queries the response was YES. [2023-11-28 23:51:45,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10125 conditions, 5534 events. 2730/5534 cut-off events. For 362/362 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 36119 event pairs, 2563 based on Foata normal form. 8/4720 useless extension candidates. Maximal degree in co-relation 9928. Up to 4344 conditions per place. [2023-11-28 23:51:45,349 INFO L140 encePairwiseOnDemand]: 96/100 looper letters, 54 selfloop transitions, 31 changer transitions 0/114 dead transitions. [2023-11-28 23:51:45,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 114 transitions, 646 flow [2023-11-28 23:51:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-28 23:51:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-28 23:51:45,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1054 transitions. [2023-11-28 23:51:45,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34 [2023-11-28 23:51:45,356 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1054 transitions. [2023-11-28 23:51:45,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1054 transitions. [2023-11-28 23:51:45,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:51:45,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1054 transitions. [2023-11-28 23:51:45,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 34.0) internal successors, (1054), 31 states have internal predecessors, (1054), 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) [2023-11-28 23:51:45,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 100.0) internal successors, (3200), 32 states have internal predecessors, (3200), 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) [2023-11-28 23:51:45,369 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 100.0) internal successors, (3200), 32 states have internal predecessors, (3200), 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) [2023-11-28 23:51:45,369 INFO L175 Difference]: Start difference. First operand has 111 places, 98 transitions, 332 flow. Second operand 31 states and 1054 transitions. [2023-11-28 23:51:45,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 114 transitions, 646 flow [2023-11-28 23:51:45,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 114 transitions, 628 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-28 23:51:45,375 INFO L231 Difference]: Finished difference. Result has 145 places, 114 transitions, 555 flow [2023-11-28 23:51:45,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=555, PETRI_PLACES=145, PETRI_TRANSITIONS=114} [2023-11-28 23:51:45,376 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 58 predicate places. [2023-11-28 23:51:45,376 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 114 transitions, 555 flow [2023-11-28 23:51:45,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 32.14705882352941) internal successors, (1093), 34 states have internal predecessors, (1093), 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) [2023-11-28 23:51:45,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:51:45,377 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:51:45,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-28 23:51:45,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:51:45,581 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, t2_funErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-28 23:51:45,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:51:45,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1321536739, now seen corresponding path program 3 times [2023-11-28 23:51:45,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:51:45,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43251885] [2023-11-28 23:51:45,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:51:45,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:51:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:51:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:51:46,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:51:46,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43251885] [2023-11-28 23:51:46,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43251885] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 23:51:46,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410440674] [2023-11-28 23:51:46,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:51:46,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 23:51:46,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:51:46,951 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 23:51:46,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e2634b6-09c6-4e0b-8fdf-590a1ad18801/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process