./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC --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 a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:58:05,717 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:58:05,820 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-23 23:58:05,832 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:58:05,832 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:58:05,873 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:58:05,874 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:58:05,874 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:58:05,874 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:58:05,874 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:58:05,874 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:58:05,874 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:58:05,876 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:58:05,876 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:58:05,876 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:58:05,876 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:58:05,877 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 23:58:05,877 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:58:05,877 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:58:05,877 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:58:05,877 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:58:05,877 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 23:58:05,877 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:58:05,877 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 23:58:05,877 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-23 23:58:05,878 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 23:58:05,878 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:58:05,878 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 23:58:05,878 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:58:05,878 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:58:05,878 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:58:05,878 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:58:05,878 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:58:05,878 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:58:05,880 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:58:05,880 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:58:05,880 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:58:05,880 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:58:05,880 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:58:05,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:58:05,881 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:58:05,881 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:58:05,881 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 23:58:05,881 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 23:58:05,881 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:58:05,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:58:05,882 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:58:05,882 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:58:05,882 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:58:05,882 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:58:05,882 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC 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 -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2024-11-23 23:58:06,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:58:06,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:58:06,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:58:06,220 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:58:06,220 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:58:06,221 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-11-23 23:58:09,326 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/data/c00094784/327032fd3fed47b5931b38dab0f335de/FLAG826753e67 [2024-11-23 23:58:09,653 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:58:09,659 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-11-23 23:58:09,674 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/data/c00094784/327032fd3fed47b5931b38dab0f335de/FLAG826753e67 [2024-11-23 23:58:09,726 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/data/c00094784/327032fd3fed47b5931b38dab0f335de [2024-11-23 23:58:09,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:58:09,738 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:58:09,739 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:58:09,739 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:58:09,746 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:58:09,747 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:58:09" (1/1) ... [2024-11-23 23:58:09,748 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22105436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:09, skipping insertion in model container [2024-11-23 23:58:09,749 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:58:09" (1/1) ... [2024-11-23 23:58:09,772 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:58:10,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:58:10,027 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:58:10,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:58:10,097 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:58:10,097 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:10 WrapperNode [2024-11-23 23:58:10,098 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:58:10,099 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:58:10,099 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:58:10,099 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:58:10,106 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:10" (1/1) ... [2024-11-23 23:58:10,116 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:10" (1/1) ... [2024-11-23 23:58:10,165 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 349 [2024-11-23 23:58:10,167 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:58:10,167 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:58:10,168 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:58:10,168 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:58:10,178 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:10" (1/1) ... [2024-11-23 23:58:10,179 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:10" (1/1) ... [2024-11-23 23:58:10,187 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:10" (1/1) ... [2024-11-23 23:58:10,215 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-23 23:58:10,215 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:10" (1/1) ... [2024-11-23 23:58:10,215 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:10" (1/1) ... [2024-11-23 23:58:10,230 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:10" (1/1) ... [2024-11-23 23:58:10,231 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:10" (1/1) ... [2024-11-23 23:58:10,235 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:10" (1/1) ... [2024-11-23 23:58:10,237 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:10" (1/1) ... [2024-11-23 23:58:10,239 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:10" (1/1) ... [2024-11-23 23:58:10,242 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:58:10,243 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:58:10,243 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:58:10,243 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:58:10,244 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:10" (1/1) ... [2024-11-23 23:58:10,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:58:10,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:58:10,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:58:10,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:58:10,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:58:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 23:58:10,318 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 23:58:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 23:58:10,318 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 23:58:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 23:58:10,318 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 23:58:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-23 23:58:10,318 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-23 23:58:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:58:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:58:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:58:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:58:10,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 23:58:10,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 23:58:10,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 23:58:10,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:58:10,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:58:10,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:58:10,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:58:10,321 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 23:58:10,487 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:58:10,490 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:58:11,134 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 23:58:11,135 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:58:11,865 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:58:11,865 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-23 23:58:11,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:58:11 BoogieIcfgContainer [2024-11-23 23:58:11,866 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:58:11,870 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:58:11,870 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:58:11,875 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:58:11,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:58:09" (1/3) ... [2024-11-23 23:58:11,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268f496c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:58:11, skipping insertion in model container [2024-11-23 23:58:11,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:58:10" (2/3) ... [2024-11-23 23:58:11,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268f496c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:58:11, skipping insertion in model container [2024-11-23 23:58:11,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:58:11" (3/3) ... [2024-11-23 23:58:11,878 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2024-11-23 23:58:11,900 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:58:11,902 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-buffer-mult-alt2.wvr.c that has 5 procedures, 75 locations, 1 initial locations, 6 loop locations, and 30 error locations. [2024-11-23 23:58:11,902 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 23:58:12,152 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-23 23:58:12,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 80 transitions, 188 flow [2024-11-23 23:58:12,273 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2024-11-23 23:58:12,276 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-23 23:58:12,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 76 events. 6/76 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 242 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2024-11-23 23:58:12,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 80 transitions, 188 flow [2024-11-23 23:58:12,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 74 transitions, 169 flow [2024-11-23 23:58:12,298 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:58:12,313 INFO L333 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, 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;@4b7b6a2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:58:12,313 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2024-11-23 23:58:12,318 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 23:58:12,318 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-23 23:58:12,319 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 23:58:12,319 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:58:12,320 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:58:12,320 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-23 23:58:12,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:58:12,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1079219, now seen corresponding path program 1 times [2024-11-23 23:58:12,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:58:12,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627879341] [2024-11-23 23:58:12,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:58:12,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:58:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:58:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:58:12,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:58:12,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627879341] [2024-11-23 23:58:12,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627879341] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:58:12,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:58:12,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:58:12,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960486998] [2024-11-23 23:58:12,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:58:12,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:58:12,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:58:12,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:58:12,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:58:12,816 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 80 [2024-11-23 23:58:12,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 74 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 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) [2024-11-23 23:58:12,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:58:12,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 80 [2024-11-23 23:58:12,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:58:20,458 INFO L124 PetriNetUnfolderBase]: 22241/31179 cut-off events. [2024-11-23 23:58:20,458 INFO L125 PetriNetUnfolderBase]: For 584/584 co-relation queries the response was YES. [2024-11-23 23:58:20,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62066 conditions, 31179 events. 22241/31179 cut-off events. For 584/584 co-relation queries the response was YES. Maximal size of possible extension queue 4435. Compared 253626 event pairs, 21798 based on Foata normal form. 2/13069 useless extension candidates. Maximal degree in co-relation 57340. Up to 29415 conditions per place. [2024-11-23 23:58:20,769 INFO L140 encePairwiseOnDemand]: 61/80 looper letters, 47 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-11-23 23:58:20,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 72 transitions, 273 flow [2024-11-23 23:58:20,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:58:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:58:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 154 transitions. [2024-11-23 23:58:20,788 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-11-23 23:58:20,790 INFO L175 Difference]: Start difference. First operand has 81 places, 74 transitions, 169 flow. Second operand 4 states and 154 transitions. [2024-11-23 23:58:20,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 72 transitions, 273 flow [2024-11-23 23:58:20,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 72 transitions, 260 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-23 23:58:20,892 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 200 flow [2024-11-23 23:58:20,895 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-11-23 23:58:20,903 INFO L279 CegarLoopForPetriNet]: 81 programPoint places, -9 predicate places. [2024-11-23 23:58:20,903 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 200 flow [2024-11-23 23:58:20,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 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) [2024-11-23 23:58:20,904 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:58:20,905 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-23 23:58:20,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:58:20,905 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-23 23:58:20,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:58:20,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2087324259, now seen corresponding path program 1 times [2024-11-23 23:58:20,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:58:20,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691194342] [2024-11-23 23:58:20,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:58:20,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:58:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:58:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:58:21,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:58:21,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691194342] [2024-11-23 23:58:21,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691194342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:58:21,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027617135] [2024-11-23 23:58:21,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:58:21,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:58:21,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:58:21,162 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:58:21,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:58:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:58:21,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 23:58:21,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:58:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:58:21,397 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 23:58:21,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027617135] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:58:21,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 23:58:21,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-23 23:58:21,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4573249] [2024-11-23 23:58:21,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:58:21,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:58:21,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:58:21,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:58:21,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:58:21,429 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 80 [2024-11-23 23:58:21,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 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) [2024-11-23 23:58:21,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:58:21,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 80 [2024-11-23 23:58:21,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:58:26,014 INFO L124 PetriNetUnfolderBase]: 22241/31177 cut-off events. [2024-11-23 23:58:26,014 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-23 23:58:26,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61444 conditions, 31177 events. 22241/31177 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 4435. Compared 253528 event pairs, 21798 based on Foata normal form. 2/13070 useless extension candidates. Maximal degree in co-relation 61394. Up to 29405 conditions per place. [2024-11-23 23:58:26,241 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 40 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-11-23 23:58:26,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 70 transitions, 296 flow [2024-11-23 23:58:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:58:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:58:26,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-11-23 23:58:26,244 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-11-23 23:58:26,244 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 200 flow. Second operand 6 states and 186 transitions. [2024-11-23 23:58:26,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 70 transitions, 296 flow [2024-11-23 23:58:26,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 296 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 23:58:26,247 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 216 flow [2024-11-23 23:58:26,247 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=216, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-11-23 23:58:26,248 INFO L279 CegarLoopForPetriNet]: 81 programPoint places, -6 predicate places. [2024-11-23 23:58:26,248 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 216 flow [2024-11-23 23:58:26,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 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) [2024-11-23 23:58:26,249 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:58:26,249 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-23 23:58:26,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 23:58:26,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:58:26,452 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-23 23:58:26,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:58:26,453 INFO L85 PathProgramCache]: Analyzing trace with hash 282543678, now seen corresponding path program 1 times [2024-11-23 23:58:26,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:58:26,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045590471] [2024-11-23 23:58:26,456 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:58:26,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:58:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:58:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:58:26,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:58:26,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045590471] [2024-11-23 23:58:26,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045590471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:58:26,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741845438] [2024-11-23 23:58:26,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:58:26,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:58:26,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:58:26,697 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:58:26,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:58:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:58:26,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 23:58:26,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:58:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:58:26,907 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:58:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:58:26,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741845438] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:58:26,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:58:26,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-23 23:58:26,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448829195] [2024-11-23 23:58:26,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:58:26,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-23 23:58:26,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:58:26,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-23 23:58:26,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:58:27,019 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 80 [2024-11-23 23:58:27,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 216 flow. Second operand has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 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) [2024-11-23 23:58:27,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:58:27,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 80 [2024-11-23 23:58:27,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:58:31,106 INFO L124 PetriNetUnfolderBase]: 22247/31201 cut-off events. [2024-11-23 23:58:31,106 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-23 23:58:31,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61538 conditions, 31201 events. 22247/31201 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 4435. Compared 253611 event pairs, 21798 based on Foata normal form. 6/13097 useless extension candidates. Maximal degree in co-relation 61396. Up to 29416 conditions per place. [2024-11-23 23:58:31,578 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 45 selfloop transitions, 25 changer transitions 0/88 dead transitions. [2024-11-23 23:58:31,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 470 flow [2024-11-23 23:58:31,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:58:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 23:58:31,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 296 transitions. [2024-11-23 23:58:31,582 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37 [2024-11-23 23:58:31,582 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 216 flow. Second operand 10 states and 296 transitions. [2024-11-23 23:58:31,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 470 flow [2024-11-23 23:58:31,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 88 transitions, 412 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-23 23:58:31,590 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 356 flow [2024-11-23 23:58:31,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=356, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2024-11-23 23:58:31,592 INFO L279 CegarLoopForPetriNet]: 81 programPoint places, 1 predicate places. [2024-11-23 23:58:31,593 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 356 flow [2024-11-23 23:58:31,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.083333333333332) internal successors, (277), 12 states have internal predecessors, (277), 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) [2024-11-23 23:58:31,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:58:31,594 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:58:31,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-23 23:58:31,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b19dd3f9-7245-440c-a53f-98aeab82b7f2/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:58:31,798 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-23 23:58:31,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:58:31,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1065487039, now seen corresponding path program 1 times [2024-11-23 23:58:31,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:58:31,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941778903] [2024-11-23 23:58:31,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:58:31,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:58:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:58:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:58:31,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:58:31,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941778903] [2024-11-23 23:58:31,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941778903] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:58:31,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:58:31,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 23:58:31,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976144563] [2024-11-23 23:58:31,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:58:31,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:58:31,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:58:31,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:58:31,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:58:31,941 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 80 [2024-11-23 23:58:31,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2024-11-23 23:58:31,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:58:31,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 80 [2024-11-23 23:58:31,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:58:38,338 INFO L124 PetriNetUnfolderBase]: 31828/45389 cut-off events. [2024-11-23 23:58:38,338 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-23 23:58:38,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88736 conditions, 45389 events. 31828/45389 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 5240. Compared 375765 event pairs, 11046 based on Foata normal form. 0/21357 useless extension candidates. Maximal degree in co-relation 88669. Up to 26988 conditions per place. [2024-11-23 23:58:38,662 INFO L140 encePairwiseOnDemand]: 76/80 looper letters, 100 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2024-11-23 23:58:38,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 122 transitions, 635 flow [2024-11-23 23:58:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:58:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:58:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2024-11-23 23:58:38,664 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-11-23 23:58:38,664 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 356 flow. Second operand 3 states and 158 transitions. [2024-11-23 23:58:38,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 122 transitions, 635 flow [2024-11-23 23:58:38,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 122 transitions, 611 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-23 23:58:38,668 INFO L231 Difference]: Finished difference. Result has 83 places, 89 transitions, 346 flow [2024-11-23 23:58:38,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=83, PETRI_TRANSITIONS=89} [2024-11-23 23:58:38,669 INFO L279 CegarLoopForPetriNet]: 81 programPoint places, 2 predicate places. [2024-11-23 23:58:38,670 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 89 transitions, 346 flow [2024-11-23 23:58:38,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2024-11-23 23:58:38,670 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:58:38,670 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:58:38,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-23 23:58:38,670 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2024-11-23 23:58:38,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:58:38,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1065487037, now seen corresponding path program 1 times [2024-11-23 23:58:38,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:58:38,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439772842] [2024-11-23 23:58:38,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:58:38,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:58:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:58:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:58:38,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:58:38,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439772842] [2024-11-23 23:58:38,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439772842] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:58:38,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:58:38,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:58:38,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084993856] [2024-11-23 23:58:38,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:58:38,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:58:38,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:58:38,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:58:38,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:58:38,965 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 80 [2024-11-23 23:58:38,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 89 transitions, 346 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2024-11-23 23:58:38,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:58:38,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 80 [2024-11-23 23:58:38,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand