./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c --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_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme --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 1b3f2e76aa91b47c1b0ab3ebb03a5219efabc6e79eff8c780f49eaa0a2d155ad --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:41:46,115 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:41:46,252 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-26 10:41:46,261 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:41:46,262 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:41:46,307 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:41:46,308 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:41:46,309 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:41:46,310 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:41:46,316 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:41:46,316 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:41:46,318 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:41:46,319 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:41:46,321 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:41:46,321 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:41:46,322 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:41:46,322 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:41:46,323 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:41:46,323 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:41:46,324 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:41:46,324 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:41:46,325 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:41:46,326 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:41:46,326 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:41:46,327 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-26 10:41:46,327 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:41:46,327 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:41:46,328 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:41:46,328 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:41:46,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:41:46,331 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:41:46,331 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:41:46,332 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:41:46,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:41:46,333 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:41:46,333 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:41:46,333 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:41:46,334 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:41:46,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:41:46,334 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:41:46,335 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:41:46,335 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:41:46,335 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:41:46,336 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:41:46,336 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_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b3f2e76aa91b47c1b0ab3ebb03a5219efabc6e79eff8c780f49eaa0a2d155ad [2023-11-26 10:41:46,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:41:46,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:41:46,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:41:46,780 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:41:46,780 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:41:46,782 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2023-11-26 10:41:49,911 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:41:50,169 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:41:50,169 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/sv-benchmarks/c/weaver/parallel-misc-4.wvr.c [2023-11-26 10:41:50,180 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/data/ed2af5a21/72feb09ca0af4163921e00f763125020/FLAG7333523bf [2023-11-26 10:41:50,199 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/data/ed2af5a21/72feb09ca0af4163921e00f763125020 [2023-11-26 10:41:50,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:41:50,207 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:41:50,211 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:41:50,211 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:41:50,217 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:41:50,217 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:41:50" (1/1) ... [2023-11-26 10:41:50,219 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d592b34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:50, skipping insertion in model container [2023-11-26 10:41:50,219 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:41:50" (1/1) ... [2023-11-26 10:41:50,254 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:41:50,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:41:50,574 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:41:50,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:41:50,634 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:41:50,634 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:41:50,643 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:41:50,643 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:50 WrapperNode [2023-11-26 10:41:50,643 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:41:50,645 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:41:50,645 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:41:50,645 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:41:50,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:50" (1/1) ... [2023-11-26 10:41:50,674 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:50" (1/1) ... [2023-11-26 10:41:50,710 INFO L138 Inliner]: procedures = 22, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2023-11-26 10:41:50,711 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:41:50,711 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:41:50,712 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:41:50,712 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:41:50,724 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:50" (1/1) ... [2023-11-26 10:41:50,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:50" (1/1) ... [2023-11-26 10:41:50,740 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:50" (1/1) ... [2023-11-26 10:41:50,766 INFO L175 MemorySlicer]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-26 10:41:50,779 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:50" (1/1) ... [2023-11-26 10:41:50,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:50" (1/1) ... [2023-11-26 10:41:50,785 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:50" (1/1) ... [2023-11-26 10:41:50,795 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:50" (1/1) ... [2023-11-26 10:41:50,798 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:50" (1/1) ... [2023-11-26 10:41:50,799 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:50" (1/1) ... [2023-11-26 10:41:50,802 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:41:50,803 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:41:50,804 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:41:50,804 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:41:50,821 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:50" (1/1) ... [2023-11-26 10:41:50,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:41:50,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:50,855 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:41:50,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:41:50,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:41:50,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 10:41:50,901 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 10:41:50,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 10:41:50,901 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 10:41:50,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 10:41:50,902 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 10:41:50,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:41:50,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:41:50,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:41:50,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:41:50,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:41:50,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:41:50,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:41:50,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:41:50,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:41:50,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 10:41:50,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 10:41:50,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:41:50,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:41:50,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:41:50,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:41:50,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:41:50,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:41:50,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:41:50,909 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:41:51,040 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:41:51,044 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:41:51,369 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:41:51,540 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:41:51,540 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-26 10:41:51,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:41:51 BoogieIcfgContainer [2023-11-26 10:41:51,541 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:41:51,544 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:41:51,544 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:41:51,548 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:41:51,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:41:50" (1/3) ... [2023-11-26 10:41:51,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b58550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:41:51, skipping insertion in model container [2023-11-26 10:41:51,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:41:50" (2/3) ... [2023-11-26 10:41:51,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b58550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:41:51, skipping insertion in model container [2023-11-26 10:41:51,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:41:51" (3/3) ... [2023-11-26 10:41:51,551 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2023-11-26 10:41:51,561 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 10:41:51,609 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:41:51,609 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-26 10:41:51,609 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:41:51,720 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 10:41:51,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 47 transitions, 115 flow [2023-11-26 10:41:51,789 INFO L124 PetriNetUnfolderBase]: 4/44 cut-off events. [2023-11-26 10:41:51,790 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 10:41:51,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 44 events. 4/44 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 124 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-11-26 10:41:51,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 47 transitions, 115 flow [2023-11-26 10:41:51,799 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 40 transitions, 92 flow [2023-11-26 10:41:51,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:41:51,816 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;@36d9b42c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:41:51,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-11-26 10:41:51,826 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:41:51,827 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2023-11-26 10:41:51,827 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 10:41:51,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:51,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:51,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-26 10:41:51,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:51,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1184491158, now seen corresponding path program 1 times [2023-11-26 10:41:51,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:51,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749695181] [2023-11-26 10:41:51,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:51,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:52,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:52,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749695181] [2023-11-26 10:41:52,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749695181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:52,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:52,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:41:52,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333710294] [2023-11-26 10:41:52,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:52,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:52,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:52,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:52,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:52,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-26 10:41:52,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:52,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:52,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-26 10:41:52,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:52,663 INFO L124 PetriNetUnfolderBase]: 1271/1839 cut-off events. [2023-11-26 10:41:52,663 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-11-26 10:41:52,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3620 conditions, 1839 events. 1271/1839 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 8715 event pairs, 187 based on Foata normal form. 0/1102 useless extension candidates. Maximal degree in co-relation 3327. Up to 1565 conditions per place. [2023-11-26 10:41:52,728 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 33 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2023-11-26 10:41:52,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 54 transitions, 205 flow [2023-11-26 10:41:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:41:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:41:52,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2023-11-26 10:41:52,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7304964539007093 [2023-11-26 10:41:52,743 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 103 transitions. [2023-11-26 10:41:52,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 103 transitions. [2023-11-26 10:41:52,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:52,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 103 transitions. [2023-11-26 10:41:52,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:52,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:52,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:52,757 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 92 flow. Second operand 3 states and 103 transitions. [2023-11-26 10:41:52,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 54 transitions, 205 flow [2023-11-26 10:41:52,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 54 transitions, 195 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 10:41:52,766 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 133 flow [2023-11-26 10:41:52,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2023-11-26 10:41:52,773 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-11-26 10:41:52,773 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 133 flow [2023-11-26 10:41:52,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:52,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:52,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:52,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:41:52,774 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-26 10:41:52,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:52,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1447552410, now seen corresponding path program 1 times [2023-11-26 10:41:52,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:52,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065113445] [2023-11-26 10:41:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:52,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:52,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:52,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065113445] [2023-11-26 10:41:52,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065113445] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:52,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:52,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:41:52,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429562764] [2023-11-26 10:41:52,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:52,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:52,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:52,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:52,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:52,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-26 10:41:52,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:52,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:52,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-26 10:41:52,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:53,179 INFO L124 PetriNetUnfolderBase]: 865/1270 cut-off events. [2023-11-26 10:41:53,180 INFO L125 PetriNetUnfolderBase]: For 260/260 co-relation queries the response was YES. [2023-11-26 10:41:53,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3262 conditions, 1270 events. 865/1270 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 6738 event pairs, 395 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 1762. Up to 1144 conditions per place. [2023-11-26 10:41:53,199 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 25 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-11-26 10:41:53,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 177 flow [2023-11-26 10:41:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:41:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:41:53,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2023-11-26 10:41:53,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2023-11-26 10:41:53,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 81 transitions. [2023-11-26 10:41:53,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 81 transitions. [2023-11-26 10:41:53,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:53,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 81 transitions. [2023-11-26 10:41:53,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:53,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:53,216 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:53,216 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 133 flow. Second operand 3 states and 81 transitions. [2023-11-26 10:41:53,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 177 flow [2023-11-26 10:41:53,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:53,224 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 122 flow [2023-11-26 10:41:53,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-26 10:41:53,225 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -2 predicate places. [2023-11-26 10:41:53,226 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 122 flow [2023-11-26 10:41:53,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:53,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:53,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:53,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:41:53,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-26 10:41:53,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:53,227 INFO L85 PathProgramCache]: Analyzing trace with hash 988250050, now seen corresponding path program 1 times [2023-11-26 10:41:53,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:53,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384413558] [2023-11-26 10:41:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:53,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:41:53,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:53,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384413558] [2023-11-26 10:41:53,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384413558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:53,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:53,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:41:53,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257592056] [2023-11-26 10:41:53,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:53,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:41:53,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:53,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:41:53,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:41:53,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 47 [2023-11-26 10:41:53,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:53,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:53,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 47 [2023-11-26 10:41:53,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:53,836 INFO L124 PetriNetUnfolderBase]: 1367/2164 cut-off events. [2023-11-26 10:41:53,837 INFO L125 PetriNetUnfolderBase]: For 278/430 co-relation queries the response was YES. [2023-11-26 10:41:53,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5107 conditions, 2164 events. 1367/2164 cut-off events. For 278/430 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 12230 event pairs, 450 based on Foata normal form. 2/1449 useless extension candidates. Maximal degree in co-relation 5099. Up to 1011 conditions per place. [2023-11-26 10:41:53,863 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 42 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-11-26 10:41:53,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 257 flow [2023-11-26 10:41:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:41:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:41:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2023-11-26 10:41:53,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6453900709219859 [2023-11-26 10:41:53,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 91 transitions. [2023-11-26 10:41:53,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 91 transitions. [2023-11-26 10:41:53,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:53,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 91 transitions. [2023-11-26 10:41:53,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:53,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:53,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:53,869 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 122 flow. Second operand 3 states and 91 transitions. [2023-11-26 10:41:53,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 257 flow [2023-11-26 10:41:53,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:53,872 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 139 flow [2023-11-26 10:41:53,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-11-26 10:41:53,873 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-11-26 10:41:53,874 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 139 flow [2023-11-26 10:41:53,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:53,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:53,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:53,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:41:53,875 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-26 10:41:53,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:53,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1447552409, now seen corresponding path program 1 times [2023-11-26 10:41:53,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:53,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188324725] [2023-11-26 10:41:53,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:53,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:54,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:54,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188324725] [2023-11-26 10:41:54,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188324725] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:54,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415059464] [2023-11-26 10:41:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:54,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:54,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:54,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:54,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:41:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:54,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:41:54,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:54,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:54,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415059464] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:54,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:41:54,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-11-26 10:41:54,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121447329] [2023-11-26 10:41:54,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:54,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:41:54,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:54,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:41:54,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:41:54,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-26 10:41:54,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 139 flow. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:54,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:54,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-26 10:41:54,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:54,961 INFO L124 PetriNetUnfolderBase]: 2159/3910 cut-off events. [2023-11-26 10:41:54,961 INFO L125 PetriNetUnfolderBase]: For 772/772 co-relation queries the response was YES. [2023-11-26 10:41:54,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9055 conditions, 3910 events. 2159/3910 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 26226 event pairs, 119 based on Foata normal form. 0/3044 useless extension candidates. Maximal degree in co-relation 9044. Up to 1577 conditions per place. [2023-11-26 10:41:55,008 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 66 selfloop transitions, 18 changer transitions 0/102 dead transitions. [2023-11-26 10:41:55,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 102 transitions, 483 flow [2023-11-26 10:41:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:41:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:41:55,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2023-11-26 10:41:55,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7411347517730497 [2023-11-26 10:41:55,014 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 209 transitions. [2023-11-26 10:41:55,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 209 transitions. [2023-11-26 10:41:55,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:55,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 209 transitions. [2023-11-26 10:41:55,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.833333333333336) internal successors, (209), 6 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:55,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:55,020 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:55,020 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 139 flow. Second operand 6 states and 209 transitions. [2023-11-26 10:41:55,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 102 transitions, 483 flow [2023-11-26 10:41:55,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 102 transitions, 477 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:41:55,035 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 285 flow [2023-11-26 10:41:55,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=285, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2023-11-26 10:41:55,038 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2023-11-26 10:41:55,038 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 285 flow [2023-11-26 10:41:55,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 6 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:55,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:55,039 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:55,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:55,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:55,245 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-26 10:41:55,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:55,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1447552376, now seen corresponding path program 1 times [2023-11-26 10:41:55,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:55,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908849088] [2023-11-26 10:41:55,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:55,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:55,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:55,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908849088] [2023-11-26 10:41:55,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908849088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:55,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429184649] [2023-11-26 10:41:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:55,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:55,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:55,373 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:55,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:41:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:55,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:41:55,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:55,499 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 10:41:55,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429184649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:55,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 10:41:55,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-11-26 10:41:55,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801643769] [2023-11-26 10:41:55,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:55,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:41:55,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:55,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:41:55,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:41:55,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-26 10:41:55,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:55,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:55,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-26 10:41:55,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:56,338 INFO L124 PetriNetUnfolderBase]: 3257/5806 cut-off events. [2023-11-26 10:41:56,338 INFO L125 PetriNetUnfolderBase]: For 11632/11632 co-relation queries the response was YES. [2023-11-26 10:41:56,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17332 conditions, 5806 events. 3257/5806 cut-off events. For 11632/11632 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 41511 event pairs, 807 based on Foata normal form. 142/5264 useless extension candidates. Maximal degree in co-relation 17318. Up to 2516 conditions per place. [2023-11-26 10:41:56,420 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 47 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2023-11-26 10:41:56,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 81 transitions, 542 flow [2023-11-26 10:41:56,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:41:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:41:56,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2023-11-26 10:41:56,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2023-11-26 10:41:56,423 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 118 transitions. [2023-11-26 10:41:56,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 118 transitions. [2023-11-26 10:41:56,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:56,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 118 transitions. [2023-11-26 10:41:56,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:56,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:56,426 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:56,426 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 285 flow. Second operand 4 states and 118 transitions. [2023-11-26 10:41:56,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 81 transitions, 542 flow [2023-11-26 10:41:56,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 538 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:56,444 INFO L231 Difference]: Finished difference. Result has 57 places, 68 transitions, 459 flow [2023-11-26 10:41:56,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=459, PETRI_PLACES=57, PETRI_TRANSITIONS=68} [2023-11-26 10:41:56,449 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2023-11-26 10:41:56,449 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 68 transitions, 459 flow [2023-11-26 10:41:56,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:56,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:56,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:56,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:41:56,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:56,657 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-26 10:41:56,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash 314166089, now seen corresponding path program 1 times [2023-11-26 10:41:56,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:56,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043165987] [2023-11-26 10:41:56,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:56,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:56,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:56,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043165987] [2023-11-26 10:41:56,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043165987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:41:56,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:41:56,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:41:56,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565720743] [2023-11-26 10:41:56,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:41:56,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:41:56,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:56,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:41:56,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:41:56,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-26 10:41:56,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 68 transitions, 459 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:56,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:56,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-26 10:41:56,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:41:58,056 INFO L124 PetriNetUnfolderBase]: 4467/8210 cut-off events. [2023-11-26 10:41:58,057 INFO L125 PetriNetUnfolderBase]: For 26098/26098 co-relation queries the response was YES. [2023-11-26 10:41:58,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28117 conditions, 8210 events. 4467/8210 cut-off events. For 26098/26098 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 61177 event pairs, 229 based on Foata normal form. 160/7820 useless extension candidates. Maximal degree in co-relation 28100. Up to 3863 conditions per place. [2023-11-26 10:41:58,162 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 69 selfloop transitions, 16 changer transitions 0/103 dead transitions. [2023-11-26 10:41:58,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 103 transitions, 828 flow [2023-11-26 10:41:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:41:58,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:41:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2023-11-26 10:41:58,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6914893617021277 [2023-11-26 10:41:58,165 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 130 transitions. [2023-11-26 10:41:58,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 130 transitions. [2023-11-26 10:41:58,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:41:58,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 130 transitions. [2023-11-26 10:41:58,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:58,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:58,168 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:58,169 INFO L175 Difference]: Start difference. First operand has 57 places, 68 transitions, 459 flow. Second operand 4 states and 130 transitions. [2023-11-26 10:41:58,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 103 transitions, 828 flow [2023-11-26 10:41:58,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 103 transitions, 817 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-26 10:41:58,207 INFO L231 Difference]: Finished difference. Result has 61 places, 76 transitions, 622 flow [2023-11-26 10:41:58,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=622, PETRI_PLACES=61, PETRI_TRANSITIONS=76} [2023-11-26 10:41:58,210 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2023-11-26 10:41:58,211 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 76 transitions, 622 flow [2023-11-26 10:41:58,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:58,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:41:58,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:41:58,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:41:58,212 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-26 10:41:58,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:41:58,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1498779283, now seen corresponding path program 1 times [2023-11-26 10:41:58,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:41:58,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700780956] [2023-11-26 10:41:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:58,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:41:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:58,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:41:58,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700780956] [2023-11-26 10:41:58,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700780956] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:41:58,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585152667] [2023-11-26 10:41:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:41:58,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:41:58,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:41:58,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:41:58,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:41:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:41:58,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-26 10:41:58,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:41:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:58,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:41:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:41:58,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585152667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:41:58,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:41:58,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-11-26 10:41:58,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56691619] [2023-11-26 10:41:58,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:41:58,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:41:58,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:41:58,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:41:58,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:41:58,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-26 10:41:58,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 76 transitions, 622 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:41:58,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:41:58,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-26 10:41:58,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:01,539 INFO L124 PetriNetUnfolderBase]: 9259/17498 cut-off events. [2023-11-26 10:42:01,539 INFO L125 PetriNetUnfolderBase]: For 85816/85816 co-relation queries the response was YES. [2023-11-26 10:42:01,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62990 conditions, 17498 events. 9259/17498 cut-off events. For 85816/85816 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 146133 event pairs, 353 based on Foata normal form. 894/17170 useless extension candidates. Maximal degree in co-relation 62970. Up to 6679 conditions per place. [2023-11-26 10:42:01,781 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 113 selfloop transitions, 55 changer transitions 0/186 dead transitions. [2023-11-26 10:42:01,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 186 transitions, 1873 flow [2023-11-26 10:42:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:42:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:42:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 208 transitions. [2023-11-26 10:42:01,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7375886524822695 [2023-11-26 10:42:01,783 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 208 transitions. [2023-11-26 10:42:01,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 208 transitions. [2023-11-26 10:42:01,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:01,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 208 transitions. [2023-11-26 10:42:01,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.666666666666664) internal successors, (208), 6 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:01,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:01,785 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:01,786 INFO L175 Difference]: Start difference. First operand has 61 places, 76 transitions, 622 flow. Second operand 6 states and 208 transitions. [2023-11-26 10:42:01,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 186 transitions, 1873 flow [2023-11-26 10:42:01,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 186 transitions, 1869 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:42:01,822 INFO L231 Difference]: Finished difference. Result has 68 places, 119 transitions, 1444 flow [2023-11-26 10:42:01,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1444, PETRI_PLACES=68, PETRI_TRANSITIONS=119} [2023-11-26 10:42:01,824 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2023-11-26 10:42:01,824 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 119 transitions, 1444 flow [2023-11-26 10:42:01,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:01,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:01,824 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:01,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:02,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:02,031 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-26 10:42:02,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:02,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1979130694, now seen corresponding path program 1 times [2023-11-26 10:42:02,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:02,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862065359] [2023-11-26 10:42:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:02,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:02,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:02,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862065359] [2023-11-26 10:42:02,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862065359] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:42:02,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188203838] [2023-11-26 10:42:02,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:02,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:02,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:02,161 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:02,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:42:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:02,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:42:02,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:02,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:42:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:02,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188203838] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:42:02,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:42:02,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-26 10:42:02,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701837062] [2023-11-26 10:42:02,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:42:02,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:42:02,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:02,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:42:02,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:42:02,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-26 10:42:02,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 119 transitions, 1444 flow. Second operand has 10 states, 10 states have (on average 20.6) internal successors, (206), 10 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:02,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:02,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-26 10:42:02,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:09,223 INFO L124 PetriNetUnfolderBase]: 23595/45642 cut-off events. [2023-11-26 10:42:09,223 INFO L125 PetriNetUnfolderBase]: For 477280/477280 co-relation queries the response was YES. [2023-11-26 10:42:09,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171434 conditions, 45642 events. 23595/45642 cut-off events. For 477280/477280 co-relation queries the response was YES. Maximal size of possible extension queue 1292. Compared 434955 event pairs, 355 based on Foata normal form. 6076/48498 useless extension candidates. Maximal degree in co-relation 171410. Up to 16201 conditions per place. [2023-11-26 10:42:09,791 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 216 selfloop transitions, 182 changer transitions 0/416 dead transitions. [2023-11-26 10:42:09,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 416 transitions, 5326 flow [2023-11-26 10:42:09,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:42:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 10:42:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 365 transitions. [2023-11-26 10:42:09,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.776595744680851 [2023-11-26 10:42:09,795 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 365 transitions. [2023-11-26 10:42:09,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 365 transitions. [2023-11-26 10:42:09,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:09,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 365 transitions. [2023-11-26 10:42:09,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 36.5) internal successors, (365), 10 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:09,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 47.0) internal successors, (517), 11 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:09,799 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 47.0) internal successors, (517), 11 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:09,799 INFO L175 Difference]: Start difference. First operand has 68 places, 119 transitions, 1444 flow. Second operand 10 states and 365 transitions. [2023-11-26 10:42:09,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 416 transitions, 5326 flow [2023-11-26 10:42:09,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 416 transitions, 5138 flow, removed 92 selfloop flow, removed 1 redundant places. [2023-11-26 10:42:09,992 INFO L231 Difference]: Finished difference. Result has 83 places, 294 transitions, 4769 flow [2023-11-26 10:42:09,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4769, PETRI_PLACES=83, PETRI_TRANSITIONS=294} [2023-11-26 10:42:09,994 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 37 predicate places. [2023-11-26 10:42:09,994 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 294 transitions, 4769 flow [2023-11-26 10:42:09,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.6) internal successors, (206), 10 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:09,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:09,995 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:10,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:42:10,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:10,214 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 16 more)] === [2023-11-26 10:42:10,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:10,214 INFO L85 PathProgramCache]: Analyzing trace with hash 268140253, now seen corresponding path program 1 times [2023-11-26 10:42:10,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:10,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818970474] [2023-11-26 10:42:10,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:10,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:10,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:10,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818970474] [2023-11-26 10:42:10,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818970474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:42:10,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873512958] [2023-11-26 10:42:10,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:10,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:42:10,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:10,552 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:42:10,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00811c8b-f99b-49b7-891b-b5ca1e718998/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:42:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:10,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 10:42:10,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:42:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:10,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:42:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:10,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873512958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:42:10,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:42:10,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-26 10:42:10,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846588306] [2023-11-26 10:42:10,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:42:10,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:42:10,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:10,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:42:10,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:42:10,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-26 10:42:10,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 294 transitions, 4769 flow. Second operand has 12 states, 12 states have (on average 20.5) internal successors, (246), 12 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:10,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:10,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-26 10:42:10,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:35,952 INFO L124 PetriNetUnfolderBase]: 71843/139336 cut-off events. [2023-11-26 10:42:35,952 INFO L125 PetriNetUnfolderBase]: For 1800344/1800344 co-relation queries the response was YES. [2023-11-26 10:42:36,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618872 conditions, 139336 events. 71843/139336 cut-off events. For 1800344/1800344 co-relation queries the response was YES. Maximal size of possible extension queue 3883. Compared 1518180 event pairs, 1901 based on Foata normal form. 7870/137050 useless extension candidates. Maximal degree in co-relation 618840. Up to 43599 conditions per place. [2023-11-26 10:42:37,591 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 356 selfloop transitions, 918 changer transitions 0/1292 dead transitions. [2023-11-26 10:42:37,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 1292 transitions, 22751 flow [2023-11-26 10:42:37,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 10:42:37,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 10:42:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 442 transitions. [2023-11-26 10:42:37,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7836879432624113 [2023-11-26 10:42:37,594 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 442 transitions. [2023-11-26 10:42:37,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 442 transitions. [2023-11-26 10:42:37,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:37,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 442 transitions. [2023-11-26 10:42:37,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 36.833333333333336) internal successors, (442), 12 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:37,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 47.0) internal successors, (611), 13 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:37,599 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 47.0) internal successors, (611), 13 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 10:42:37,600 INFO L175 Difference]: Start difference. First operand has 83 places, 294 transitions, 4769 flow. Second operand 12 states and 442 transitions. [2023-11-26 10:42:37,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 1292 transitions, 22751 flow