./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.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_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/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_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/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_30a798f3-18ac-414d-9e88-2f85e586bc2f/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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 18:44:27,877 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 18:44:27,992 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-23 18:44:28,003 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 18:44:28,004 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 18:44:28,052 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 18:44:28,054 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 18:44:28,054 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 18:44:28,054 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 18:44:28,055 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 18:44:28,056 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 18:44:28,057 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 18:44:28,057 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 18:44:28,057 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 18:44:28,058 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 18:44:28,058 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 18:44:28,058 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 18:44:28,058 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 18:44:28,058 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 18:44:28,058 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 18:44:28,058 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 18:44:28,058 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 18:44:28,058 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 18:44:28,058 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 18:44:28,059 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-23 18:44:28,059 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 18:44:28,059 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 18:44:28,059 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 18:44:28,059 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 18:44:28,059 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 18:44:28,059 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 18:44:28,059 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:44:28,059 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:44:28,062 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:44:28,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:44:28,062 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 18:44:28,063 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:44:28,063 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:44:28,063 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:44:28,063 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:44:28,064 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 18:44:28,064 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 18:44:28,064 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 18:44:28,064 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 18:44:28,065 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 18:44:28,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 18:44:28,065 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 18:44:28,065 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 18:44:28,065 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 18:44:28,065 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 18:44:28,065 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_30a798f3-18ac-414d-9e88-2f85e586bc2f/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 -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2024-11-23 18:44:28,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 18:44:28,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 18:44:28,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 18:44:28,440 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 18:44:28,441 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 18:44:28,443 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-11-23 18:44:31,588 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/data/76df46b8b/abb43a8e02bd4aad970d8e78d5ae9e3f/FLAG811290749 [2024-11-23 18:44:31,950 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 18:44:31,954 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-11-23 18:44:31,987 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/data/76df46b8b/abb43a8e02bd4aad970d8e78d5ae9e3f/FLAG811290749 [2024-11-23 18:44:32,053 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/data/76df46b8b/abb43a8e02bd4aad970d8e78d5ae9e3f [2024-11-23 18:44:32,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 18:44:32,062 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 18:44:32,065 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 18:44:32,068 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 18:44:32,075 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 18:44:32,076 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:44:32" (1/1) ... [2024-11-23 18:44:32,077 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a3d39b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32, skipping insertion in model container [2024-11-23 18:44:32,077 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:44:32" (1/1) ... [2024-11-23 18:44:32,102 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 18:44:32,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:44:32,364 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 18:44:32,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:44:32,410 INFO L204 MainTranslator]: Completed translation [2024-11-23 18:44:32,411 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32 WrapperNode [2024-11-23 18:44:32,411 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 18:44:32,412 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 18:44:32,412 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 18:44:32,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 18:44:32,421 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32" (1/1) ... [2024-11-23 18:44:32,433 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32" (1/1) ... [2024-11-23 18:44:32,466 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2024-11-23 18:44:32,466 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 18:44:32,467 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 18:44:32,467 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 18:44:32,467 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 18:44:32,479 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32" (1/1) ... [2024-11-23 18:44:32,479 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32" (1/1) ... [2024-11-23 18:44:32,482 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32" (1/1) ... [2024-11-23 18:44:32,499 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-23 18:44:32,499 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32" (1/1) ... [2024-11-23 18:44:32,499 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32" (1/1) ... [2024-11-23 18:44:32,507 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32" (1/1) ... [2024-11-23 18:44:32,509 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32" (1/1) ... [2024-11-23 18:44:32,513 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32" (1/1) ... [2024-11-23 18:44:32,515 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32" (1/1) ... [2024-11-23 18:44:32,517 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32" (1/1) ... [2024-11-23 18:44:32,522 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 18:44:32,526 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 18:44:32,526 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 18:44:32,526 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 18:44:32,532 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32" (1/1) ... [2024-11-23 18:44:32,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:44:32,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:44:32,574 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 18:44:32,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 18:44:32,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 18:44:32,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 18:44:32,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 18:44:32,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 18:44:32,612 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 18:44:32,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 18:44:32,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 18:44:32,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 18:44:32,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 18:44:32,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 18:44:32,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 18:44:32,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 18:44:32,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 18:44:32,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 18:44:32,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 18:44:32,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 18:44:32,618 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 18:44:32,779 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 18:44:32,784 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 18:44:33,256 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 18:44:33,257 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 18:44:33,648 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 18:44:33,652 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-23 18:44:33,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:44:33 BoogieIcfgContainer [2024-11-23 18:44:33,655 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 18:44:33,658 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 18:44:33,658 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 18:44:33,665 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 18:44:33,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 06:44:32" (1/3) ... [2024-11-23 18:44:33,666 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe7f784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:44:33, skipping insertion in model container [2024-11-23 18:44:33,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:44:32" (2/3) ... [2024-11-23 18:44:33,667 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fe7f784 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:44:33, skipping insertion in model container [2024-11-23 18:44:33,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:44:33" (3/3) ... [2024-11-23 18:44:33,669 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2024-11-23 18:44:33,689 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 18:44:33,691 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-send-receive-alt.wvr.c that has 3 procedures, 37 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2024-11-23 18:44:33,691 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 18:44:33,804 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-23 18:44:33,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 42 transitions, 98 flow [2024-11-23 18:44:33,919 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2024-11-23 18:44:33,924 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-23 18:44:33,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 40 events. 6/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 88 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-11-23 18:44:33,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 42 transitions, 98 flow [2024-11-23 18:44:33,938 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 85 flow [2024-11-23 18:44:33,954 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:44:33,972 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;@4a488118, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:44:33,973 INFO L334 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2024-11-23 18:44:33,977 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 18:44:33,978 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-23 18:44:33,978 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 18:44:33,978 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:33,979 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:44:33,979 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:33,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:33,986 INFO L85 PathProgramCache]: Analyzing trace with hash 477622, now seen corresponding path program 1 times [2024-11-23 18:44:33,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:33,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407081066] [2024-11-23 18:44:33,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:33,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:34,378 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 18:44:34,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:34,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407081066] [2024-11-23 18:44:34,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407081066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:44:34,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:44:34,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:44:34,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085440644] [2024-11-23 18:44:34,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:44:34,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:44:34,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:34,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:44:34,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:44:34,455 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:44:34,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 18:44:34,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:34,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:44:34,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:34,809 INFO L124 PetriNetUnfolderBase]: 346/618 cut-off events. [2024-11-23 18:44:34,809 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-23 18:44:34,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 618 events. 346/618 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2808 event pairs, 283 based on Foata normal form. 1/407 useless extension candidates. Maximal degree in co-relation 1131. Up to 560 conditions per place. [2024-11-23 18:44:34,826 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 29 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-11-23 18:44:34,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 151 flow [2024-11-23 18:44:34,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:44:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:44:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2024-11-23 18:44:34,854 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-11-23 18:44:34,856 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 85 flow. Second operand 4 states and 66 transitions. [2024-11-23 18:44:34,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 151 flow [2024-11-23 18:44:34,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 146 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:44:34,866 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 103 flow [2024-11-23 18:44:34,870 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-23 18:44:34,874 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2024-11-23 18:44:34,874 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 103 flow [2024-11-23 18:44:34,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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 18:44:34,875 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:34,875 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-23 18:44:34,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 18:44:34,876 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:34,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:34,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1344390633, now seen corresponding path program 1 times [2024-11-23 18:44:34,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:34,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148591859] [2024-11-23 18:44:34,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:34,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:35,088 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 18:44:35,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:35,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148591859] [2024-11-23 18:44:35,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148591859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:44:35,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006910241] [2024-11-23 18:44:35,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:35,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:44:35,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:44:35,093 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:44:35,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 18:44:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:35,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 18:44:35,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:44:35,310 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 18:44:35,310 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:44:35,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006910241] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:44:35,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 18:44:35,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-23 18:44:35,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914233754] [2024-11-23 18:44:35,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:44:35,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:44:35,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:35,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:44:35,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-23 18:44:35,332 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:44:35,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 18:44:35,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:35,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:44:35,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:35,655 INFO L124 PetriNetUnfolderBase]: 346/617 cut-off events. [2024-11-23 18:44:35,655 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-23 18:44:35,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1212 conditions, 617 events. 346/617 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2820 event pairs, 283 based on Foata normal form. 1/407 useless extension candidates. Maximal degree in co-relation 1185. Up to 555 conditions per place. [2024-11-23 18:44:35,668 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 25 selfloop transitions, 7 changer transitions 0/37 dead transitions. [2024-11-23 18:44:35,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 163 flow [2024-11-23 18:44:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:44:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 18:44:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 75 transitions. [2024-11-23 18:44:35,671 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2976190476190476 [2024-11-23 18:44:35,671 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 103 flow. Second operand 6 states and 75 transitions. [2024-11-23 18:44:35,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 163 flow [2024-11-23 18:44:35,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:44:35,676 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 110 flow [2024-11-23 18:44:35,677 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=110, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-11-23 18:44:35,678 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2024-11-23 18:44:35,678 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 110 flow [2024-11-23 18:44:35,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 18:44:35,678 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:35,678 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:44:35,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-23 18:44:35,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:44:35,879 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:35,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:35,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1199670838, now seen corresponding path program 1 times [2024-11-23 18:44:35,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:35,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439029675] [2024-11-23 18:44:35,880 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:35,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:36,050 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 18:44:36,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:36,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439029675] [2024-11-23 18:44:36,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439029675] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:44:36,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:44:36,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 18:44:36,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511707219] [2024-11-23 18:44:36,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:44:36,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:44:36,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:36,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:44:36,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:44:36,052 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-11-23 18:44:36,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 18:44:36,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:36,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-11-23 18:44:36,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:36,287 INFO L124 PetriNetUnfolderBase]: 433/786 cut-off events. [2024-11-23 18:44:36,287 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-23 18:44:36,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1547 conditions, 786 events. 433/786 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3696 event pairs, 202 based on Foata normal form. 22/542 useless extension candidates. Maximal degree in co-relation 1517. Up to 465 conditions per place. [2024-11-23 18:44:36,315 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 42 selfloop transitions, 3 changer transitions 2/53 dead transitions. [2024-11-23 18:44:36,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 53 transitions, 237 flow [2024-11-23 18:44:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:44:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:44:36,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-11-23 18:44:36,320 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-11-23 18:44:36,320 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 110 flow. Second operand 3 states and 75 transitions. [2024-11-23 18:44:36,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 53 transitions, 237 flow [2024-11-23 18:44:36,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 215 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-23 18:44:36,323 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 113 flow [2024-11-23 18:44:36,324 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2024-11-23 18:44:36,325 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2024-11-23 18:44:36,325 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 113 flow [2024-11-23 18:44:36,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 18:44:36,326 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:36,326 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-23 18:44:36,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 18:44:36,326 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:36,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:36,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1273562878, now seen corresponding path program 1 times [2024-11-23 18:44:36,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:36,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29671344] [2024-11-23 18:44:36,327 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:36,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:36,465 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 18:44:36,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:36,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29671344] [2024-11-23 18:44:36,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29671344] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:44:36,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569202286] [2024-11-23 18:44:36,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:36,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:44:36,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:44:36,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:44:36,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 18:44:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:36,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 18:44:36,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:44:36,588 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 18:44:36,589 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:44:36,655 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 18:44:36,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569202286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:44:36,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:44:36,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-23 18:44:36,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020373949] [2024-11-23 18:44:36,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:44:36,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-23 18:44:36,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:36,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-23 18:44:36,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-23 18:44:36,676 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:44:36,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 113 flow. Second operand has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 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 18:44:36,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:36,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:44:36,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:36,951 INFO L124 PetriNetUnfolderBase]: 436/795 cut-off events. [2024-11-23 18:44:36,951 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-11-23 18:44:36,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1716 conditions, 795 events. 436/795 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3786 event pairs, 364 based on Foata normal form. 3/589 useless extension candidates. Maximal degree in co-relation 1665. Up to 732 conditions per place. [2024-11-23 18:44:36,956 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 30 selfloop transitions, 13 changer transitions 0/48 dead transitions. [2024-11-23 18:44:36,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 229 flow [2024-11-23 18:44:36,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 18:44:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 18:44:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-11-23 18:44:36,958 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2714285714285714 [2024-11-23 18:44:36,959 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 113 flow. Second operand 10 states and 114 transitions. [2024-11-23 18:44:36,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 229 flow [2024-11-23 18:44:36,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:44:36,961 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 184 flow [2024-11-23 18:44:36,961 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=184, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-11-23 18:44:36,961 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 13 predicate places. [2024-11-23 18:44:36,962 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 184 flow [2024-11-23 18:44:36,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 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 18:44:36,962 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:36,962 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:44:36,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 18:44:37,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:44:37,166 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:37,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:37,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1135694855, now seen corresponding path program 1 times [2024-11-23 18:44:37,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:37,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964485826] [2024-11-23 18:44:37,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:37,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:37,235 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 18:44:37,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:37,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964485826] [2024-11-23 18:44:37,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964485826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:44:37,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:44:37,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:44:37,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924807720] [2024-11-23 18:44:37,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:44:37,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:44:37,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:37,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:44:37,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:44:37,237 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-11-23 18:44:37,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 18:44:37,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:37,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-11-23 18:44:37,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:37,451 INFO L124 PetriNetUnfolderBase]: 352/656 cut-off events. [2024-11-23 18:44:37,451 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2024-11-23 18:44:37,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1419 conditions, 656 events. 352/656 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2954 event pairs, 116 based on Foata normal form. 0/529 useless extension candidates. Maximal degree in co-relation 1384. Up to 445 conditions per place. [2024-11-23 18:44:37,458 INFO L140 encePairwiseOnDemand]: 39/42 looper letters, 47 selfloop transitions, 1 changer transitions 2/56 dead transitions. [2024-11-23 18:44:37,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 301 flow [2024-11-23 18:44:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:44:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:44:37,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-23 18:44:37,462 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-11-23 18:44:37,463 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 184 flow. Second operand 3 states and 65 transitions. [2024-11-23 18:44:37,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 301 flow [2024-11-23 18:44:37,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 290 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-23 18:44:37,468 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 176 flow [2024-11-23 18:44:37,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-11-23 18:44:37,472 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 12 predicate places. [2024-11-23 18:44:37,472 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 176 flow [2024-11-23 18:44:37,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 18:44:37,473 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:37,473 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:44:37,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-23 18:44:37,473 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:37,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:37,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1135694820, now seen corresponding path program 1 times [2024-11-23 18:44:37,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:37,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282309949] [2024-11-23 18:44:37,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:37,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:37,687 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 18:44:37,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:37,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282309949] [2024-11-23 18:44:37,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282309949] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:44:37,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:44:37,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:44:37,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121976272] [2024-11-23 18:44:37,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:44:37,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:44:37,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:37,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:44:37,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:44:37,689 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-11-23 18:44:37,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 18:44:37,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:37,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-11-23 18:44:37,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:37,936 INFO L124 PetriNetUnfolderBase]: 419/787 cut-off events. [2024-11-23 18:44:37,936 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2024-11-23 18:44:37,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 787 events. 419/787 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3580 event pairs, 352 based on Foata normal form. 11/689 useless extension candidates. Maximal degree in co-relation 1696. Up to 592 conditions per place. [2024-11-23 18:44:37,941 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 38 selfloop transitions, 2 changer transitions 14/60 dead transitions. [2024-11-23 18:44:37,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 314 flow [2024-11-23 18:44:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:44:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:44:37,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 79 transitions. [2024-11-23 18:44:37,943 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-11-23 18:44:37,943 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 176 flow. Second operand 4 states and 79 transitions. [2024-11-23 18:44:37,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 314 flow [2024-11-23 18:44:37,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 314 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 18:44:37,947 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 179 flow [2024-11-23 18:44:37,948 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2024-11-23 18:44:37,949 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 16 predicate places. [2024-11-23 18:44:37,950 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 179 flow [2024-11-23 18:44:37,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 18:44:37,951 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:37,951 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:44:37,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 18:44:37,951 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:37,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:37,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1098080119, now seen corresponding path program 1 times [2024-11-23 18:44:37,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:37,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735802668] [2024-11-23 18:44:37,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:37,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:44:38,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:38,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735802668] [2024-11-23 18:44:38,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735802668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:44:38,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876108596] [2024-11-23 18:44:38,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:38,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:44:38,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:44:38,273 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:44:38,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 18:44:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:38,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 18:44:38,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:44:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:44:38,482 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:44:38,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876108596] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:44:38,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 18:44:38,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2024-11-23 18:44:38,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790731091] [2024-11-23 18:44:38,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:44:38,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:44:38,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:38,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:44:38,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-23 18:44:38,486 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-11-23 18:44:38,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 18:44:38,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:38,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-11-23 18:44:38,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:38,681 INFO L124 PetriNetUnfolderBase]: 250/495 cut-off events. [2024-11-23 18:44:38,681 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-11-23 18:44:38,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1105 conditions, 495 events. 250/495 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2099 event pairs, 154 based on Foata normal form. 56/477 useless extension candidates. Maximal degree in co-relation 1081. Up to 355 conditions per place. [2024-11-23 18:44:38,686 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 7 changer transitions 6/52 dead transitions. [2024-11-23 18:44:38,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 288 flow [2024-11-23 18:44:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:44:38,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:44:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 72 transitions. [2024-11-23 18:44:38,688 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-11-23 18:44:38,688 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 179 flow. Second operand 4 states and 72 transitions. [2024-11-23 18:44:38,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 288 flow [2024-11-23 18:44:38,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 282 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-23 18:44:38,692 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 172 flow [2024-11-23 18:44:38,692 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2024-11-23 18:44:38,693 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 12 predicate places. [2024-11-23 18:44:38,693 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 172 flow [2024-11-23 18:44:38,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 18:44:38,693 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:38,693 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-23 18:44:38,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 18:44:38,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-23 18:44:38,894 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:38,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:38,895 INFO L85 PathProgramCache]: Analyzing trace with hash 660549781, now seen corresponding path program 2 times [2024-11-23 18:44:38,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:38,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472609995] [2024-11-23 18:44:38,895 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:44:38,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:38,913 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:44:38,914 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:44:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-23 18:44:38,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:38,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472609995] [2024-11-23 18:44:38,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472609995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:44:38,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183235729] [2024-11-23 18:44:38,967 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:44:38,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:44:38,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:44:38,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:44:38,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 18:44:39,051 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 18:44:39,051 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:44:39,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:44:39,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:44:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-23 18:44:39,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:44:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-23 18:44:39,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183235729] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:44:39,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:44:39,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2024-11-23 18:44:39,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312741905] [2024-11-23 18:44:39,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:44:39,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:44:39,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:39,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:44:39,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:44:39,181 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:44:39,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 18:44:39,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:39,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:44:39,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:39,319 INFO L124 PetriNetUnfolderBase]: 159/308 cut-off events. [2024-11-23 18:44:39,319 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2024-11-23 18:44:39,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 308 events. 159/308 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1098 event pairs, 115 based on Foata normal form. 1/276 useless extension candidates. Maximal degree in co-relation 740. Up to 262 conditions per place. [2024-11-23 18:44:39,323 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 19 selfloop transitions, 15 changer transitions 0/39 dead transitions. [2024-11-23 18:44:39,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 39 transitions, 230 flow [2024-11-23 18:44:39,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:44:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:44:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 49 transitions. [2024-11-23 18:44:39,325 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2916666666666667 [2024-11-23 18:44:39,325 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 172 flow. Second operand 4 states and 49 transitions. [2024-11-23 18:44:39,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 39 transitions, 230 flow [2024-11-23 18:44:39,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 206 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-11-23 18:44:39,331 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 168 flow [2024-11-23 18:44:39,332 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2024-11-23 18:44:39,332 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2024-11-23 18:44:39,332 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 168 flow [2024-11-23 18:44:39,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 18:44:39,333 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:39,333 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:44:39,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 18:44:39,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:44:39,533 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:39,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:39,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1563468714, now seen corresponding path program 1 times [2024-11-23 18:44:39,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:39,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959546800] [2024-11-23 18:44:39,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:39,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:44:39,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:39,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959546800] [2024-11-23 18:44:39,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959546800] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:44:39,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:44:39,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:44:39,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043873160] [2024-11-23 18:44:39,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:44:39,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:44:39,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:39,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:44:39,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:44:39,627 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:44:39,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 18:44:39,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:39,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:44:39,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:39,760 INFO L124 PetriNetUnfolderBase]: 207/380 cut-off events. [2024-11-23 18:44:39,760 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-11-23 18:44:39,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 380 events. 207/380 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1432 event pairs, 76 based on Foata normal form. 6/350 useless extension candidates. Maximal degree in co-relation 810. Up to 268 conditions per place. [2024-11-23 18:44:39,764 INFO L140 encePairwiseOnDemand]: 39/42 looper letters, 41 selfloop transitions, 2 changer transitions 2/48 dead transitions. [2024-11-23 18:44:39,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 48 transitions, 280 flow [2024-11-23 18:44:39,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:44:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:44:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-11-23 18:44:39,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-11-23 18:44:39,765 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 168 flow. Second operand 3 states and 56 transitions. [2024-11-23 18:44:39,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 48 transitions, 280 flow [2024-11-23 18:44:39,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 48 transitions, 250 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:44:39,769 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 146 flow [2024-11-23 18:44:39,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2024-11-23 18:44:39,770 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2024-11-23 18:44:39,770 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 146 flow [2024-11-23 18:44:39,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 18:44:39,770 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:39,770 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:44:39,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 18:44:39,770 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:39,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:39,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1563467660, now seen corresponding path program 1 times [2024-11-23 18:44:39,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:39,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437731413] [2024-11-23 18:44:39,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:39,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:44:40,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:40,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437731413] [2024-11-23 18:44:40,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437731413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:44:40,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281764847] [2024-11-23 18:44:40,661 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:40,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:44:40,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:44:40,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:44:40,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 18:44:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:40,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-23 18:44:40,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:44:40,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-23 18:44:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:44:41,464 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:44:42,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2024-11-23 18:44:42,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2024-11-23 18:44:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:44:42,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281764847] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:44:42,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:44:42,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-23 18:44:42,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871892680] [2024-11-23 18:44:42,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:44:42,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-23 18:44:42,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:42,249 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-23 18:44:42,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-23 18:44:42,322 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:44:42,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 146 flow. Second operand has 17 states, 17 states have (on average 9.470588235294118) internal successors, (161), 17 states have internal predecessors, (161), 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 18:44:42,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:42,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:44:42,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:44,308 INFO L124 PetriNetUnfolderBase]: 617/1174 cut-off events. [2024-11-23 18:44:44,308 INFO L125 PetriNetUnfolderBase]: For 211/223 co-relation queries the response was YES. [2024-11-23 18:44:44,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2721 conditions, 1174 events. 617/1174 cut-off events. For 211/223 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5880 event pairs, 187 based on Foata normal form. 0/1088 useless extension candidates. Maximal degree in co-relation 1440. Up to 291 conditions per place. [2024-11-23 18:44:44,316 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 88 selfloop transitions, 28 changer transitions 4/126 dead transitions. [2024-11-23 18:44:44,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 126 transitions, 636 flow [2024-11-23 18:44:44,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-23 18:44:44,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-23 18:44:44,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 231 transitions. [2024-11-23 18:44:44,320 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34375 [2024-11-23 18:44:44,320 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 146 flow. Second operand 16 states and 231 transitions. [2024-11-23 18:44:44,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 126 transitions, 636 flow [2024-11-23 18:44:44,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 126 transitions, 632 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:44:44,326 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 334 flow [2024-11-23 18:44:44,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=334, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2024-11-23 18:44:44,328 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 26 predicate places. [2024-11-23 18:44:44,329 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 334 flow [2024-11-23 18:44:44,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.470588235294118) internal successors, (161), 17 states have internal predecessors, (161), 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 18:44:44,329 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:44,329 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:44:44,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-23 18:44:44,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-23 18:44:44,533 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:44,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:44,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1563467661, now seen corresponding path program 1 times [2024-11-23 18:44:44,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:44,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71280930] [2024-11-23 18:44:44,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:44,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:44:45,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:45,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71280930] [2024-11-23 18:44:45,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71280930] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:44:45,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230576577] [2024-11-23 18:44:45,227 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:45,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:44:45,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:44:45,232 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:44:45,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 18:44:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:45,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-23 18:44:45,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:44:45,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-23 18:44:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:44:45,852 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:44:46,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-23 18:44:46,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2024-11-23 18:44:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:44:46,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230576577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:44:46,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:44:46,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-23 18:44:46,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787242045] [2024-11-23 18:44:46,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:44:46,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-23 18:44:46,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:46,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-23 18:44:46,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-23 18:44:46,503 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:44:46,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 334 flow. Second operand has 18 states, 18 states have (on average 9.333333333333334) internal successors, (168), 18 states have internal predecessors, (168), 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 18:44:46,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:46,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:44:46,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:48,020 INFO L124 PetriNetUnfolderBase]: 484/951 cut-off events. [2024-11-23 18:44:48,021 INFO L125 PetriNetUnfolderBase]: For 1351/1351 co-relation queries the response was YES. [2024-11-23 18:44:48,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2625 conditions, 951 events. 484/951 cut-off events. For 1351/1351 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4665 event pairs, 187 based on Foata normal form. 48/996 useless extension candidates. Maximal degree in co-relation 2107. Up to 281 conditions per place. [2024-11-23 18:44:48,029 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 26 changer transitions 4/101 dead transitions. [2024-11-23 18:44:48,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 101 transitions, 638 flow [2024-11-23 18:44:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 18:44:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-23 18:44:48,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 189 transitions. [2024-11-23 18:44:48,031 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32142857142857145 [2024-11-23 18:44:48,031 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 334 flow. Second operand 14 states and 189 transitions. [2024-11-23 18:44:48,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 101 transitions, 638 flow [2024-11-23 18:44:48,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 101 transitions, 600 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-11-23 18:44:48,039 INFO L231 Difference]: Finished difference. Result has 73 places, 53 transitions, 350 flow [2024-11-23 18:44:48,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=350, PETRI_PLACES=73, PETRI_TRANSITIONS=53} [2024-11-23 18:44:48,040 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 34 predicate places. [2024-11-23 18:44:48,040 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 53 transitions, 350 flow [2024-11-23 18:44:48,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.333333333333334) internal successors, (168), 18 states have internal predecessors, (168), 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 18:44:48,041 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:48,041 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:44:48,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-23 18:44:48,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:44:48,245 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:48,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:48,246 INFO L85 PathProgramCache]: Analyzing trace with hash 531977901, now seen corresponding path program 2 times [2024-11-23 18:44:48,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:48,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889188645] [2024-11-23 18:44:48,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:44:48,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:48,290 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:44:48,290 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:44:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:44:48,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:48,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889188645] [2024-11-23 18:44:48,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889188645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:44:48,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:44:48,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:44:48,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143227652] [2024-11-23 18:44:48,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:44:48,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:44:48,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:48,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:44:48,477 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:44:48,478 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-11-23 18:44:48,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 53 transitions, 350 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 18:44:48,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:48,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-11-23 18:44:48,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:48,694 INFO L124 PetriNetUnfolderBase]: 534/1029 cut-off events. [2024-11-23 18:44:48,695 INFO L125 PetriNetUnfolderBase]: For 2013/2013 co-relation queries the response was YES. [2024-11-23 18:44:48,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3086 conditions, 1029 events. 534/1029 cut-off events. For 2013/2013 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5089 event pairs, 157 based on Foata normal form. 12/1040 useless extension candidates. Maximal degree in co-relation 2380. Up to 356 conditions per place. [2024-11-23 18:44:48,704 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 56 selfloop transitions, 6 changer transitions 2/70 dead transitions. [2024-11-23 18:44:48,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 70 transitions, 552 flow [2024-11-23 18:44:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:44:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:44:48,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-23 18:44:48,706 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-11-23 18:44:48,706 INFO L175 Difference]: Start difference. First operand has 73 places, 53 transitions, 350 flow. Second operand 4 states and 76 transitions. [2024-11-23 18:44:48,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 70 transitions, 552 flow [2024-11-23 18:44:48,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 70 transitions, 492 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-11-23 18:44:48,718 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 321 flow [2024-11-23 18:44:48,719 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=321, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2024-11-23 18:44:48,720 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 26 predicate places. [2024-11-23 18:44:48,720 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 321 flow [2024-11-23 18:44:48,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 18:44:48,720 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:48,720 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:44:48,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-23 18:44:48,720 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:48,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:48,722 INFO L85 PathProgramCache]: Analyzing trace with hash 531977900, now seen corresponding path program 2 times [2024-11-23 18:44:48,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:48,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993887223] [2024-11-23 18:44:48,722 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:44:48,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:48,760 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:44:48,761 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:44:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:44:48,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:48,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993887223] [2024-11-23 18:44:48,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993887223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:44:48,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:44:48,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:44:48,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909734967] [2024-11-23 18:44:48,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:44:48,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:44:48,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:48,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:44:48,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:44:48,899 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-11-23 18:44:48,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 18:44:48,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:48,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-11-23 18:44:48,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:49,098 INFO L124 PetriNetUnfolderBase]: 516/999 cut-off events. [2024-11-23 18:44:49,098 INFO L125 PetriNetUnfolderBase]: For 1566/1566 co-relation queries the response was YES. [2024-11-23 18:44:49,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2898 conditions, 999 events. 516/999 cut-off events. For 1566/1566 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4932 event pairs, 147 based on Foata normal form. 12/1010 useless extension candidates. Maximal degree in co-relation 2248. Up to 356 conditions per place. [2024-11-23 18:44:49,106 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 55 selfloop transitions, 6 changer transitions 2/69 dead transitions. [2024-11-23 18:44:49,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 69 transitions, 499 flow [2024-11-23 18:44:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:44:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:44:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2024-11-23 18:44:49,108 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-11-23 18:44:49,108 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 321 flow. Second operand 4 states and 75 transitions. [2024-11-23 18:44:49,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 69 transitions, 499 flow [2024-11-23 18:44:49,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 69 transitions, 492 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:44:49,117 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 333 flow [2024-11-23 18:44:49,118 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=333, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2024-11-23 18:44:49,118 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 28 predicate places. [2024-11-23 18:44:49,119 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 333 flow [2024-11-23 18:44:49,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 18:44:49,119 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:49,120 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:44:49,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 18:44:49,120 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:49,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:49,121 INFO L85 PathProgramCache]: Analyzing trace with hash 387744524, now seen corresponding path program 1 times [2024-11-23 18:44:49,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:49,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843630548] [2024-11-23 18:44:49,121 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:49,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 18:44:49,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:49,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843630548] [2024-11-23 18:44:49,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843630548] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:44:49,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:44:49,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:44:49,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708194262] [2024-11-23 18:44:49,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:44:49,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:44:49,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:49,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:44:49,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:44:49,231 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-11-23 18:44:49,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 333 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 18:44:49,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:49,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-11-23 18:44:49,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:49,509 INFO L124 PetriNetUnfolderBase]: 857/1656 cut-off events. [2024-11-23 18:44:49,509 INFO L125 PetriNetUnfolderBase]: For 3466/3466 co-relation queries the response was YES. [2024-11-23 18:44:49,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4939 conditions, 1656 events. 857/1656 cut-off events. For 3466/3466 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8865 event pairs, 266 based on Foata normal form. 46/1701 useless extension candidates. Maximal degree in co-relation 2918. Up to 607 conditions per place. [2024-11-23 18:44:49,522 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 61 selfloop transitions, 16 changer transitions 2/85 dead transitions. [2024-11-23 18:44:49,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 682 flow [2024-11-23 18:44:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:44:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:44:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-11-23 18:44:49,524 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-11-23 18:44:49,524 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 333 flow. Second operand 4 states and 80 transitions. [2024-11-23 18:44:49,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 682 flow [2024-11-23 18:44:49,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 85 transitions, 664 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:44:49,532 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 522 flow [2024-11-23 18:44:49,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=522, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-11-23 18:44:49,533 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 30 predicate places. [2024-11-23 18:44:49,533 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 522 flow [2024-11-23 18:44:49,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 18:44:49,534 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:49,534 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:44:49,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-23 18:44:49,534 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:49,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:49,534 INFO L85 PathProgramCache]: Analyzing trace with hash -721546965, now seen corresponding path program 1 times [2024-11-23 18:44:49,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:49,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972523375] [2024-11-23 18:44:49,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:49,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-23 18:44:49,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:49,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972523375] [2024-11-23 18:44:49,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972523375] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:44:49,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:44:49,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:44:49,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766906218] [2024-11-23 18:44:49,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:44:49,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:44:49,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:49,717 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:44:49,717 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:44:49,726 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-11-23 18:44:49,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 522 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 18:44:49,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:49,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-11-23 18:44:49,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:50,144 INFO L124 PetriNetUnfolderBase]: 1608/2773 cut-off events. [2024-11-23 18:44:50,145 INFO L125 PetriNetUnfolderBase]: For 6714/6714 co-relation queries the response was YES. [2024-11-23 18:44:50,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9001 conditions, 2773 events. 1608/2773 cut-off events. For 6714/6714 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 14196 event pairs, 232 based on Foata normal form. 142/2914 useless extension candidates. Maximal degree in co-relation 5148. Up to 1351 conditions per place. [2024-11-23 18:44:50,166 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 86 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2024-11-23 18:44:50,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 92 transitions, 892 flow [2024-11-23 18:44:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:44:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:44:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-11-23 18:44:50,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-11-23 18:44:50,167 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 522 flow. Second operand 4 states and 63 transitions. [2024-11-23 18:44:50,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 92 transitions, 892 flow [2024-11-23 18:44:50,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 92 transitions, 888 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-11-23 18:44:50,178 INFO L231 Difference]: Finished difference. Result has 74 places, 66 transitions, 522 flow [2024-11-23 18:44:50,178 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=522, PETRI_PLACES=74, PETRI_TRANSITIONS=66} [2024-11-23 18:44:50,179 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 35 predicate places. [2024-11-23 18:44:50,179 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 66 transitions, 522 flow [2024-11-23 18:44:50,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 18:44:50,179 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:50,179 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:44:50,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-23 18:44:50,180 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:50,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:50,180 INFO L85 PathProgramCache]: Analyzing trace with hash -721545910, now seen corresponding path program 1 times [2024-11-23 18:44:50,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:50,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343741939] [2024-11-23 18:44:50,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:50,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:44:51,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:51,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343741939] [2024-11-23 18:44:51,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343741939] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:44:51,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758555593] [2024-11-23 18:44:51,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:44:51,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:44:51,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:44:51,652 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:44:51,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 18:44:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:44:51,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-23 18:44:51,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:44:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:44:52,325 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:44:52,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:44:52,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2024-11-23 18:44:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:44:53,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758555593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:44:53,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:44:53,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2024-11-23 18:44:53,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639607384] [2024-11-23 18:44:53,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:44:53,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-23 18:44:53,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:53,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-23 18:44:53,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2024-11-23 18:44:53,302 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:44:53,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 66 transitions, 522 flow. Second operand has 32 states, 32 states have (on average 9.0625) internal successors, (290), 32 states have internal predecessors, (290), 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 18:44:53,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:53,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:44:53,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:44:57,200 INFO L124 PetriNetUnfolderBase]: 2279/4260 cut-off events. [2024-11-23 18:44:57,200 INFO L125 PetriNetUnfolderBase]: For 16508/16508 co-relation queries the response was YES. [2024-11-23 18:44:57,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14584 conditions, 4260 events. 2279/4260 cut-off events. For 16508/16508 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 26055 event pairs, 273 based on Foata normal form. 226/4483 useless extension candidates. Maximal degree in co-relation 7606. Up to 849 conditions per place. [2024-11-23 18:44:57,249 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 72 changer transitions 10/254 dead transitions. [2024-11-23 18:44:57,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 254 transitions, 2064 flow [2024-11-23 18:44:57,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-23 18:44:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-23 18:44:57,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 443 transitions. [2024-11-23 18:44:57,253 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3637110016420361 [2024-11-23 18:44:57,253 INFO L175 Difference]: Start difference. First operand has 74 places, 66 transitions, 522 flow. Second operand 29 states and 443 transitions. [2024-11-23 18:44:57,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 254 transitions, 2064 flow [2024-11-23 18:44:57,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 254 transitions, 2051 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-23 18:44:57,279 INFO L231 Difference]: Finished difference. Result has 116 places, 113 transitions, 1423 flow [2024-11-23 18:44:57,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1423, PETRI_PLACES=116, PETRI_TRANSITIONS=113} [2024-11-23 18:44:57,281 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 77 predicate places. [2024-11-23 18:44:57,281 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 113 transitions, 1423 flow [2024-11-23 18:44:57,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.0625) internal successors, (290), 32 states have internal predecessors, (290), 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 18:44:57,282 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:44:57,282 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:44:57,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 18:44:57,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-23 18:44:57,484 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:44:57,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:44:57,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1783989854, now seen corresponding path program 2 times [2024-11-23 18:44:57,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:44:57,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910543645] [2024-11-23 18:44:57,485 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:44:57,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:44:57,510 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:44:57,510 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:44:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 18:44:57,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:44:57,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910543645] [2024-11-23 18:44:57,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910543645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:44:57,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902621042] [2024-11-23 18:44:57,738 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:44:57,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:44:57,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:44:57,741 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:44:57,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 18:44:57,854 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:44:57,854 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:44:57,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-23 18:44:57,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:44:57,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-23 18:44:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:44:58,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:44:59,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2024-11-23 18:44:59,378 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-23 18:44:59,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 47 [2024-11-23 18:44:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:44:59,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902621042] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:44:59,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:44:59,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 26 [2024-11-23 18:44:59,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471046157] [2024-11-23 18:44:59,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:44:59,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-23 18:44:59,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:44:59,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-23 18:44:59,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2024-11-23 18:44:59,751 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:44:59,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 113 transitions, 1423 flow. Second operand has 28 states, 28 states have (on average 9.285714285714286) internal successors, (260), 28 states have internal predecessors, (260), 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 18:44:59,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:44:59,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:44:59,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:45:04,004 INFO L124 PetriNetUnfolderBase]: 2957/5562 cut-off events. [2024-11-23 18:45:04,004 INFO L125 PetriNetUnfolderBase]: For 53231/53231 co-relation queries the response was YES. [2024-11-23 18:45:04,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22549 conditions, 5562 events. 2957/5562 cut-off events. For 53231/53231 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 35831 event pairs, 421 based on Foata normal form. 106/5657 useless extension candidates. Maximal degree in co-relation 19224. Up to 1087 conditions per place. [2024-11-23 18:45:04,059 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 123 changer transitions 18/380 dead transitions. [2024-11-23 18:45:04,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 380 transitions, 4012 flow [2024-11-23 18:45:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-23 18:45:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-23 18:45:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 629 transitions. [2024-11-23 18:45:04,064 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3403679653679654 [2024-11-23 18:45:04,064 INFO L175 Difference]: Start difference. First operand has 116 places, 113 transitions, 1423 flow. Second operand 44 states and 629 transitions. [2024-11-23 18:45:04,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 380 transitions, 4012 flow [2024-11-23 18:45:04,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 380 transitions, 3336 flow, removed 292 selfloop flow, removed 12 redundant places. [2024-11-23 18:45:04,195 INFO L231 Difference]: Finished difference. Result has 164 places, 166 transitions, 2204 flow [2024-11-23 18:45:04,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=2204, PETRI_PLACES=164, PETRI_TRANSITIONS=166} [2024-11-23 18:45:04,196 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 125 predicate places. [2024-11-23 18:45:04,197 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 166 transitions, 2204 flow [2024-11-23 18:45:04,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.285714285714286) internal successors, (260), 28 states have internal predecessors, (260), 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 18:45:04,197 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:45:04,197 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:45:04,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 18:45:04,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-23 18:45:04,398 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:45:04,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:45:04,399 INFO L85 PathProgramCache]: Analyzing trace with hash 704064929, now seen corresponding path program 1 times [2024-11-23 18:45:04,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:45:04,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624852071] [2024-11-23 18:45:04,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:45:04,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:45:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:45:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:45:05,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:45:05,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624852071] [2024-11-23 18:45:05,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624852071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:45:05,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710581226] [2024-11-23 18:45:05,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:45:05,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:05,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:45:05,635 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:45:05,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 18:45:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:45:05,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-23 18:45:05,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:45:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:45:06,534 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:45:06,888 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-23 18:45:06,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 46 [2024-11-23 18:45:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:45:08,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710581226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:45:08,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:45:08,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2024-11-23 18:45:08,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229733528] [2024-11-23 18:45:08,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:45:08,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-23 18:45:08,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:45:08,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-23 18:45:08,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2024-11-23 18:45:08,159 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:45:08,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 166 transitions, 2204 flow. Second operand has 32 states, 32 states have (on average 9.0625) internal successors, (290), 32 states have internal predecessors, (290), 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 18:45:08,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:45:08,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:45:08,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:45:12,963 INFO L124 PetriNetUnfolderBase]: 3857/7230 cut-off events. [2024-11-23 18:45:12,964 INFO L125 PetriNetUnfolderBase]: For 63701/63701 co-relation queries the response was YES. [2024-11-23 18:45:13,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27754 conditions, 7230 events. 3857/7230 cut-off events. For 63701/63701 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 48655 event pairs, 912 based on Foata normal form. 88/7317 useless extension candidates. Maximal degree in co-relation 26548. Up to 1422 conditions per place. [2024-11-23 18:45:13,039 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 238 selfloop transitions, 106 changer transitions 7/358 dead transitions. [2024-11-23 18:45:13,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 358 transitions, 3986 flow [2024-11-23 18:45:13,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-23 18:45:13,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-23 18:45:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 482 transitions. [2024-11-23 18:45:13,043 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32789115646258504 [2024-11-23 18:45:13,044 INFO L175 Difference]: Start difference. First operand has 164 places, 166 transitions, 2204 flow. Second operand 35 states and 482 transitions. [2024-11-23 18:45:13,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 358 transitions, 3986 flow [2024-11-23 18:45:13,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 358 transitions, 3607 flow, removed 173 selfloop flow, removed 12 redundant places. [2024-11-23 18:45:13,389 INFO L231 Difference]: Finished difference. Result has 189 places, 202 transitions, 2689 flow [2024-11-23 18:45:13,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2689, PETRI_PLACES=189, PETRI_TRANSITIONS=202} [2024-11-23 18:45:13,391 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 150 predicate places. [2024-11-23 18:45:13,392 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 202 transitions, 2689 flow [2024-11-23 18:45:13,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.0625) internal successors, (290), 32 states have internal predecessors, (290), 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 18:45:13,393 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:45:13,393 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:45:13,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-23 18:45:13,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-23 18:45:13,594 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:45:13,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:45:13,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1797154933, now seen corresponding path program 2 times [2024-11-23 18:45:13,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:45:13,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120396678] [2024-11-23 18:45:13,595 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:45:13,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:45:13,634 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:45:13,635 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:45:14,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:45:14,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120396678] [2024-11-23 18:45:14,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120396678] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:45:14,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270870405] [2024-11-23 18:45:14,790 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:45:14,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:14,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:45:14,793 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:45:14,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 18:45:14,906 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:45:14,907 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:14,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-23 18:45:14,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:45:15,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-23 18:45:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:45:15,680 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:45:17,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2024-11-23 18:45:17,244 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-23 18:45:17,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 135 [2024-11-23 18:45:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:45:18,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270870405] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:45:18,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:45:18,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2024-11-23 18:45:18,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139997089] [2024-11-23 18:45:18,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:45:18,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-23 18:45:18,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:45:18,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-23 18:45:18,534 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2024-11-23 18:45:18,824 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:45:18,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 202 transitions, 2689 flow. Second operand has 35 states, 35 states have (on average 8.885714285714286) internal successors, (311), 35 states have internal predecessors, (311), 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 18:45:18,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:45:18,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:45:18,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:45:24,372 INFO L124 PetriNetUnfolderBase]: 1874/3675 cut-off events. [2024-11-23 18:45:24,372 INFO L125 PetriNetUnfolderBase]: For 44571/44571 co-relation queries the response was YES. [2024-11-23 18:45:24,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15072 conditions, 3675 events. 1874/3675 cut-off events. For 44571/44571 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 21455 event pairs, 778 based on Foata normal form. 122/3792 useless extension candidates. Maximal degree in co-relation 14701. Up to 1439 conditions per place. [2024-11-23 18:45:24,403 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 54 changer transitions 34/226 dead transitions. [2024-11-23 18:45:24,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 226 transitions, 2374 flow [2024-11-23 18:45:24,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-23 18:45:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-23 18:45:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 366 transitions. [2024-11-23 18:45:24,406 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3112244897959184 [2024-11-23 18:45:24,406 INFO L175 Difference]: Start difference. First operand has 189 places, 202 transitions, 2689 flow. Second operand 28 states and 366 transitions. [2024-11-23 18:45:24,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 226 transitions, 2374 flow [2024-11-23 18:45:24,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 226 transitions, 2092 flow, removed 110 selfloop flow, removed 22 redundant places. [2024-11-23 18:45:24,520 INFO L231 Difference]: Finished difference. Result has 180 places, 115 transitions, 1399 flow [2024-11-23 18:45:24,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1399, PETRI_PLACES=180, PETRI_TRANSITIONS=115} [2024-11-23 18:45:24,521 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 141 predicate places. [2024-11-23 18:45:24,521 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 115 transitions, 1399 flow [2024-11-23 18:45:24,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 8.885714285714286) internal successors, (311), 35 states have internal predecessors, (311), 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 18:45:24,522 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:45:24,522 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:45:24,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-23 18:45:24,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:24,726 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:45:24,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:45:24,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1797154934, now seen corresponding path program 3 times [2024-11-23 18:45:24,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:45:24,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141480164] [2024-11-23 18:45:24,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:45:24,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:45:24,755 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:45:24,756 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 18:45:24,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:45:24,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141480164] [2024-11-23 18:45:24,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141480164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:45:24,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244039949] [2024-11-23 18:45:24,943 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:45:24,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:24,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:45:24,945 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:45:24,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 18:45:25,079 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:45:25,079 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:25,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 18:45:25,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:45:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 18:45:25,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:45:25,232 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-23 18:45:25,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2024-11-23 18:45:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 18:45:25,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244039949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:45:25,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:45:25,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-23 18:45:25,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45981304] [2024-11-23 18:45:25,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:45:25,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-23 18:45:25,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:45:25,277 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-23 18:45:25,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-23 18:45:25,278 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-11-23 18:45:25,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 115 transitions, 1399 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 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 18:45:25,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:45:25,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-11-23 18:45:25,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:45:26,733 INFO L124 PetriNetUnfolderBase]: 2314/4595 cut-off events. [2024-11-23 18:45:26,733 INFO L125 PetriNetUnfolderBase]: For 76593/76593 co-relation queries the response was YES. [2024-11-23 18:45:26,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20596 conditions, 4595 events. 2314/4595 cut-off events. For 76593/76593 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 27598 event pairs, 594 based on Foata normal form. 130/4724 useless extension candidates. Maximal degree in co-relation 20545. Up to 1015 conditions per place. [2024-11-23 18:45:26,769 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 143 selfloop transitions, 72 changer transitions 8/230 dead transitions. [2024-11-23 18:45:26,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 230 transitions, 3334 flow [2024-11-23 18:45:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 18:45:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-23 18:45:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 272 transitions. [2024-11-23 18:45:26,774 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43174603174603177 [2024-11-23 18:45:26,774 INFO L175 Difference]: Start difference. First operand has 180 places, 115 transitions, 1399 flow. Second operand 15 states and 272 transitions. [2024-11-23 18:45:26,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 230 transitions, 3334 flow [2024-11-23 18:45:26,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 230 transitions, 2803 flow, removed 194 selfloop flow, removed 30 redundant places. [2024-11-23 18:45:26,896 INFO L231 Difference]: Finished difference. Result has 159 places, 135 transitions, 1820 flow [2024-11-23 18:45:26,897 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1820, PETRI_PLACES=159, PETRI_TRANSITIONS=135} [2024-11-23 18:45:26,897 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 120 predicate places. [2024-11-23 18:45:26,898 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 135 transitions, 1820 flow [2024-11-23 18:45:26,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 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 18:45:26,898 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:45:26,898 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:45:26,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 18:45:27,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:27,099 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:45:27,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:45:27,099 INFO L85 PathProgramCache]: Analyzing trace with hash 536065494, now seen corresponding path program 3 times [2024-11-23 18:45:27,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:45:27,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608427982] [2024-11-23 18:45:27,099 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:45:27,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:45:27,137 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:45:27,137 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:45:27,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:45:27,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608427982] [2024-11-23 18:45:27,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608427982] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:45:27,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495176603] [2024-11-23 18:45:27,459 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:45:27,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:27,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:45:27,462 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:45:27,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 18:45:27,632 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 18:45:27,632 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:27,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 18:45:27,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:45:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:45:27,866 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:45:28,023 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:45:28,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 54 [2024-11-23 18:45:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:45:28,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495176603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:45:28,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:45:28,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-11-23 18:45:28,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073921834] [2024-11-23 18:45:28,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:45:28,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-23 18:45:28,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:45:28,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-23 18:45:28,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-23 18:45:28,186 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-11-23 18:45:28,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 135 transitions, 1820 flow. Second operand has 15 states, 15 states have (on average 13.0) internal successors, (195), 15 states have internal predecessors, (195), 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 18:45:28,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:45:28,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-11-23 18:45:28,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:45:29,704 INFO L124 PetriNetUnfolderBase]: 2712/5337 cut-off events. [2024-11-23 18:45:29,705 INFO L125 PetriNetUnfolderBase]: For 73959/73959 co-relation queries the response was YES. [2024-11-23 18:45:29,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23826 conditions, 5337 events. 2712/5337 cut-off events. For 73959/73959 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 33276 event pairs, 668 based on Foata normal form. 80/5416 useless extension candidates. Maximal degree in co-relation 23775. Up to 2814 conditions per place. [2024-11-23 18:45:29,762 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 174 selfloop transitions, 41 changer transitions 8/230 dead transitions. [2024-11-23 18:45:29,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 230 transitions, 3082 flow [2024-11-23 18:45:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 18:45:29,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-23 18:45:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 238 transitions. [2024-11-23 18:45:29,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-11-23 18:45:29,766 INFO L175 Difference]: Start difference. First operand has 159 places, 135 transitions, 1820 flow. Second operand 14 states and 238 transitions. [2024-11-23 18:45:29,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 230 transitions, 3082 flow [2024-11-23 18:45:29,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 230 transitions, 2856 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-11-23 18:45:29,960 INFO L231 Difference]: Finished difference. Result has 171 places, 155 transitions, 2119 flow [2024-11-23 18:45:29,961 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2119, PETRI_PLACES=171, PETRI_TRANSITIONS=155} [2024-11-23 18:45:29,961 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 132 predicate places. [2024-11-23 18:45:29,961 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 155 transitions, 2119 flow [2024-11-23 18:45:29,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 13.0) internal successors, (195), 15 states have internal predecessors, (195), 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 18:45:29,961 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:45:29,962 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:45:29,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-23 18:45:30,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:30,162 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:45:30,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:45:30,165 INFO L85 PathProgramCache]: Analyzing trace with hash 785578914, now seen corresponding path program 4 times [2024-11-23 18:45:30,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:45:30,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628338187] [2024-11-23 18:45:30,165 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:45:30,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:45:30,241 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:45:30,241 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:32,094 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:45:32,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:45:32,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628338187] [2024-11-23 18:45:32,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628338187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:45:32,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394360190] [2024-11-23 18:45:32,095 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:45:32,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:32,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:45:32,099 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:45:32,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 18:45:32,216 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:45:32,216 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:32,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-23 18:45:32,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:45:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 18:45:32,625 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:45:32,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:45:32,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 54 [2024-11-23 18:45:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:45:33,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394360190] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:45:33,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:45:33,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 4] total 25 [2024-11-23 18:45:33,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36468840] [2024-11-23 18:45:33,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:45:33,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-23 18:45:33,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:45:33,004 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-23 18:45:33,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2024-11-23 18:45:33,125 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:45:33,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 155 transitions, 2119 flow. Second operand has 27 states, 27 states have (on average 9.518518518518519) internal successors, (257), 27 states have internal predecessors, (257), 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 18:45:33,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:45:33,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:45:33,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:45:35,454 INFO L124 PetriNetUnfolderBase]: 3148/6127 cut-off events. [2024-11-23 18:45:35,454 INFO L125 PetriNetUnfolderBase]: For 70443/70443 co-relation queries the response was YES. [2024-11-23 18:45:35,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26753 conditions, 6127 events. 3148/6127 cut-off events. For 70443/70443 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 38838 event pairs, 815 based on Foata normal form. 60/6187 useless extension candidates. Maximal degree in co-relation 26697. Up to 2989 conditions per place. [2024-11-23 18:45:35,509 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 48 changer transitions 10/253 dead transitions. [2024-11-23 18:45:35,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 253 transitions, 3387 flow [2024-11-23 18:45:35,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-23 18:45:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-23 18:45:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 273 transitions. [2024-11-23 18:45:35,511 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.325 [2024-11-23 18:45:35,511 INFO L175 Difference]: Start difference. First operand has 171 places, 155 transitions, 2119 flow. Second operand 20 states and 273 transitions. [2024-11-23 18:45:35,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 253 transitions, 3387 flow [2024-11-23 18:45:35,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 253 transitions, 3298 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-11-23 18:45:35,655 INFO L231 Difference]: Finished difference. Result has 188 places, 162 transitions, 2254 flow [2024-11-23 18:45:35,655 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2008, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2254, PETRI_PLACES=188, PETRI_TRANSITIONS=162} [2024-11-23 18:45:35,656 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 149 predicate places. [2024-11-23 18:45:35,656 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 162 transitions, 2254 flow [2024-11-23 18:45:35,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.518518518518519) internal successors, (257), 27 states have internal predecessors, (257), 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 18:45:35,656 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:45:35,656 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:45:35,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-23 18:45:35,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:35,857 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:45:35,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:45:35,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1535673041, now seen corresponding path program 4 times [2024-11-23 18:45:35,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:45:35,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478691698] [2024-11-23 18:45:35,858 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:45:35,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:45:35,876 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:45:35,877 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-23 18:45:36,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:45:36,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478691698] [2024-11-23 18:45:36,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478691698] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:45:36,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505790184] [2024-11-23 18:45:36,114 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 18:45:36,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:36,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:45:36,117 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:45:36,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-23 18:45:36,224 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 18:45:36,225 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:36,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 18:45:36,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:45:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:45:36,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:45:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 18:45:36,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505790184] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:45:36,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:45:36,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2024-11-23 18:45:36,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727529234] [2024-11-23 18:45:36,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:45:36,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-23 18:45:36,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:45:36,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-23 18:45:36,553 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-11-23 18:45:36,595 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:45:36,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 162 transitions, 2254 flow. Second operand has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 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 18:45:36,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:45:36,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:45:36,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:45:38,023 INFO L124 PetriNetUnfolderBase]: 2632/5111 cut-off events. [2024-11-23 18:45:38,023 INFO L125 PetriNetUnfolderBase]: For 67732/67744 co-relation queries the response was YES. [2024-11-23 18:45:38,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23721 conditions, 5111 events. 2632/5111 cut-off events. For 67732/67744 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 31128 event pairs, 2104 based on Foata normal form. 16/5127 useless extension candidates. Maximal degree in co-relation 23663. Up to 4387 conditions per place. [2024-11-23 18:45:38,100 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 114 selfloop transitions, 10 changer transitions 29/160 dead transitions. [2024-11-23 18:45:38,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 160 transitions, 2249 flow [2024-11-23 18:45:38,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 18:45:38,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 18:45:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-11-23 18:45:38,102 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2976190476190476 [2024-11-23 18:45:38,102 INFO L175 Difference]: Start difference. First operand has 188 places, 162 transitions, 2254 flow. Second operand 10 states and 125 transitions. [2024-11-23 18:45:38,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 160 transitions, 2249 flow [2024-11-23 18:45:38,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 160 transitions, 2070 flow, removed 52 selfloop flow, removed 21 redundant places. [2024-11-23 18:45:38,270 INFO L231 Difference]: Finished difference. Result has 152 places, 131 transitions, 1670 flow [2024-11-23 18:45:38,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1670, PETRI_PLACES=152, PETRI_TRANSITIONS=131} [2024-11-23 18:45:38,270 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 113 predicate places. [2024-11-23 18:45:38,271 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 131 transitions, 1670 flow [2024-11-23 18:45:38,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 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 18:45:38,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:45:38,271 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:45:38,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-23 18:45:38,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:38,472 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:45:38,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:45:38,473 INFO L85 PathProgramCache]: Analyzing trace with hash 163493527, now seen corresponding path program 5 times [2024-11-23 18:45:38,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:45:38,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304095826] [2024-11-23 18:45:38,473 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:45:38,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:45:38,535 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-23 18:45:38,539 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:45:39,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:45:39,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304095826] [2024-11-23 18:45:39,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304095826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:45:39,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954519253] [2024-11-23 18:45:39,780 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:45:39,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:39,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:45:39,782 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:45:39,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-23 18:45:39,911 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-23 18:45:39,911 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:39,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-23 18:45:39,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:45:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 18:45:40,512 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:45:40,891 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:45:40,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 74 treesize of output 106 [2024-11-23 18:45:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:45:41,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954519253] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:45:41,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:45:41,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 6] total 28 [2024-11-23 18:45:41,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169418604] [2024-11-23 18:45:41,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:45:41,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-23 18:45:41,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:45:41,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-23 18:45:41,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2024-11-23 18:45:41,234 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:45:41,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 131 transitions, 1670 flow. Second operand has 30 states, 30 states have (on average 9.8) internal successors, (294), 30 states have internal predecessors, (294), 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 18:45:41,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:45:41,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:45:41,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:45:45,921 INFO L124 PetriNetUnfolderBase]: 4632/8843 cut-off events. [2024-11-23 18:45:45,922 INFO L125 PetriNetUnfolderBase]: For 92639/92651 co-relation queries the response was YES. [2024-11-23 18:45:46,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38019 conditions, 8843 events. 4632/8843 cut-off events. For 92639/92651 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 60204 event pairs, 702 based on Foata normal form. 92/8935 useless extension candidates. Maximal degree in co-relation 37968. Up to 1697 conditions per place. [2024-11-23 18:45:46,051 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 315 selfloop transitions, 152 changer transitions 20/494 dead transitions. [2024-11-23 18:45:46,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 494 transitions, 5449 flow [2024-11-23 18:45:46,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-23 18:45:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-11-23 18:45:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 722 transitions. [2024-11-23 18:45:46,054 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35813492063492064 [2024-11-23 18:45:46,054 INFO L175 Difference]: Start difference. First operand has 152 places, 131 transitions, 1670 flow. Second operand 48 states and 722 transitions. [2024-11-23 18:45:46,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 494 transitions, 5449 flow [2024-11-23 18:45:46,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 494 transitions, 5179 flow, removed 125 selfloop flow, removed 8 redundant places. [2024-11-23 18:45:46,308 INFO L231 Difference]: Finished difference. Result has 192 places, 230 transitions, 3733 flow [2024-11-23 18:45:46,309 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=3733, PETRI_PLACES=192, PETRI_TRANSITIONS=230} [2024-11-23 18:45:46,309 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 153 predicate places. [2024-11-23 18:45:46,309 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 230 transitions, 3733 flow [2024-11-23 18:45:46,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.8) internal successors, (294), 30 states have internal predecessors, (294), 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 18:45:46,310 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:45:46,310 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:45:46,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-23 18:45:46,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:46,510 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:45:46,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:45:46,511 INFO L85 PathProgramCache]: Analyzing trace with hash 2068458620, now seen corresponding path program 5 times [2024-11-23 18:45:46,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:45:46,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810811105] [2024-11-23 18:45:46,511 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:45:46,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:45:46,555 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-23 18:45:46,555 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:45:47,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:45:47,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810811105] [2024-11-23 18:45:47,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810811105] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:45:47,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881845712] [2024-11-23 18:45:47,525 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 18:45:47,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:47,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:45:47,526 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:45:47,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-23 18:45:47,637 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-23 18:45:47,637 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:47,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-23 18:45:47,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:45:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 18:45:48,116 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:45:48,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:45:48,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 75 treesize of output 107 [2024-11-23 18:45:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:45:48,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881845712] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:45:48,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:45:48,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 26 [2024-11-23 18:45:48,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301521367] [2024-11-23 18:45:48,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:45:48,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-23 18:45:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:45:48,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-23 18:45:48,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-11-23 18:45:48,783 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:45:48,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 230 transitions, 3733 flow. Second operand has 28 states, 28 states have (on average 9.964285714285714) internal successors, (279), 28 states have internal predecessors, (279), 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 18:45:48,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:45:48,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:45:48,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:45:52,991 INFO L124 PetriNetUnfolderBase]: 4836/9319 cut-off events. [2024-11-23 18:45:52,991 INFO L125 PetriNetUnfolderBase]: For 121690/121694 co-relation queries the response was YES. [2024-11-23 18:45:53,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40718 conditions, 9319 events. 4836/9319 cut-off events. For 121690/121694 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 64512 event pairs, 842 based on Foata normal form. 364/9675 useless extension candidates. Maximal degree in co-relation 40656. Up to 2122 conditions per place. [2024-11-23 18:45:53,280 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 151 changer transitions 28/421 dead transitions. [2024-11-23 18:45:53,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 421 transitions, 5555 flow [2024-11-23 18:45:53,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-23 18:45:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-23 18:45:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 540 transitions. [2024-11-23 18:45:53,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3474903474903475 [2024-11-23 18:45:53,283 INFO L175 Difference]: Start difference. First operand has 192 places, 230 transitions, 3733 flow. Second operand 37 states and 540 transitions. [2024-11-23 18:45:53,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 421 transitions, 5555 flow [2024-11-23 18:45:53,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 421 transitions, 4543 flow, removed 391 selfloop flow, removed 25 redundant places. [2024-11-23 18:45:53,619 INFO L231 Difference]: Finished difference. Result has 205 places, 236 transitions, 3477 flow [2024-11-23 18:45:53,620 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2449, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3477, PETRI_PLACES=205, PETRI_TRANSITIONS=236} [2024-11-23 18:45:53,620 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 166 predicate places. [2024-11-23 18:45:53,620 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 236 transitions, 3477 flow [2024-11-23 18:45:53,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.964285714285714) internal successors, (279), 28 states have internal predecessors, (279), 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 18:45:53,621 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:45:53,621 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:45:53,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-23 18:45:53,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:53,821 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:45:53,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:45:53,822 INFO L85 PathProgramCache]: Analyzing trace with hash -945983061, now seen corresponding path program 6 times [2024-11-23 18:45:53,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:45:53,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012089116] [2024-11-23 18:45:53,822 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 18:45:53,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:45:53,852 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-23 18:45:53,852 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:45:54,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:45:54,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012089116] [2024-11-23 18:45:54,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012089116] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:45:54,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567433874] [2024-11-23 18:45:54,956 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 18:45:54,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:45:54,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:45:54,958 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:45:54,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-23 18:45:55,073 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-23 18:45:55,073 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:45:55,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-23 18:45:55,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:45:55,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-23 18:45:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:45:56,065 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:45:57,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 104 [2024-11-23 18:45:57,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:45:57,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 315 treesize of output 299 [2024-11-23 18:45:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:45:59,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567433874] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:45:59,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:45:59,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 44 [2024-11-23 18:45:59,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573383748] [2024-11-23 18:45:59,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:45:59,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-23 18:45:59,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:45:59,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-23 18:45:59,795 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1741, Unknown=0, NotChecked=0, Total=2070 [2024-11-23 18:46:00,082 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:46:00,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 236 transitions, 3477 flow. Second operand has 46 states, 46 states have (on average 8.956521739130435) internal successors, (412), 46 states have internal predecessors, (412), 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 18:46:00,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:46:00,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:46:00,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:46:21,765 INFO L124 PetriNetUnfolderBase]: 14796/28259 cut-off events. [2024-11-23 18:46:21,765 INFO L125 PetriNetUnfolderBase]: For 492547/492551 co-relation queries the response was YES. [2024-11-23 18:46:22,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121466 conditions, 28259 events. 14796/28259 cut-off events. For 492547/492551 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 222834 event pairs, 2584 based on Foata normal form. 902/29147 useless extension candidates. Maximal degree in co-relation 121404. Up to 6310 conditions per place. [2024-11-23 18:46:22,302 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 747 selfloop transitions, 598 changer transitions 21/1373 dead transitions. [2024-11-23 18:46:22,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1373 transitions, 18948 flow [2024-11-23 18:46:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2024-11-23 18:46:22,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2024-11-23 18:46:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 1682 transitions. [2024-11-23 18:46:22,317 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34824016563147 [2024-11-23 18:46:22,319 INFO L175 Difference]: Start difference. First operand has 205 places, 236 transitions, 3477 flow. Second operand 115 states and 1682 transitions. [2024-11-23 18:46:22,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1373 transitions, 18948 flow [2024-11-23 18:46:24,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1373 transitions, 18187 flow, removed 292 selfloop flow, removed 17 redundant places. [2024-11-23 18:46:24,593 INFO L231 Difference]: Finished difference. Result has 357 places, 816 transitions, 15866 flow [2024-11-23 18:46:24,593 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3151, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=115, PETRI_FLOW=15866, PETRI_PLACES=357, PETRI_TRANSITIONS=816} [2024-11-23 18:46:24,594 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 318 predicate places. [2024-11-23 18:46:24,594 INFO L471 AbstractCegarLoop]: Abstraction has has 357 places, 816 transitions, 15866 flow [2024-11-23 18:46:24,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 8.956521739130435) internal successors, (412), 46 states have internal predecessors, (412), 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 18:46:24,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:46:24,594 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:46:24,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-23 18:46:24,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:46:24,795 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:46:24,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:46:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1090627634, now seen corresponding path program 6 times [2024-11-23 18:46:24,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:46:24,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379292155] [2024-11-23 18:46:24,796 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 18:46:24,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:46:24,829 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-23 18:46:24,829 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:46:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 18:46:25,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:46:25,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379292155] [2024-11-23 18:46:25,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379292155] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:46:25,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314042692] [2024-11-23 18:46:25,283 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 18:46:25,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:46:25,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:46:25,286 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:46:25,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-23 18:46:25,424 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-23 18:46:25,424 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:46:25,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-23 18:46:25,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:46:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-23 18:46:25,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:46:25,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:46:25,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-23 18:46:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-23 18:46:25,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314042692] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:46:25,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:46:25,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 6] total 22 [2024-11-23 18:46:25,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601146881] [2024-11-23 18:46:25,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:46:25,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-23 18:46:25,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:46:25,878 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-23 18:46:25,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-11-23 18:46:25,954 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-11-23 18:46:25,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 816 transitions, 15866 flow. Second operand has 24 states, 24 states have (on average 11.208333333333334) internal successors, (269), 24 states have internal predecessors, (269), 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 18:46:25,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:46:25,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-11-23 18:46:25,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:46:46,394 INFO L124 PetriNetUnfolderBase]: 24150/46525 cut-off events. [2024-11-23 18:46:46,394 INFO L125 PetriNetUnfolderBase]: For 2476329/2476329 co-relation queries the response was YES. [2024-11-23 18:46:47,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294509 conditions, 46525 events. 24150/46525 cut-off events. For 2476329/2476329 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 393411 event pairs, 3019 based on Foata normal form. 734/47259 useless extension candidates. Maximal degree in co-relation 294390. Up to 9728 conditions per place. [2024-11-23 18:46:47,343 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 583 selfloop transitions, 1289 changer transitions 17/1896 dead transitions. [2024-11-23 18:46:47,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1896 transitions, 40885 flow [2024-11-23 18:46:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-23 18:46:47,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-23 18:46:47,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 711 transitions. [2024-11-23 18:46:47,347 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3601823708206687 [2024-11-23 18:46:47,347 INFO L175 Difference]: Start difference. First operand has 357 places, 816 transitions, 15866 flow. Second operand 47 states and 711 transitions. [2024-11-23 18:46:47,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1896 transitions, 40885 flow [2024-11-23 18:46:59,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1896 transitions, 33819 flow, removed 3473 selfloop flow, removed 14 redundant places. [2024-11-23 18:46:59,906 INFO L231 Difference]: Finished difference. Result has 409 places, 1608 transitions, 32168 flow [2024-11-23 18:46:59,906 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12594, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=591, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=32168, PETRI_PLACES=409, PETRI_TRANSITIONS=1608} [2024-11-23 18:46:59,907 INFO L279 CegarLoopForPetriNet]: 39 programPoint places, 370 predicate places. [2024-11-23 18:46:59,907 INFO L471 AbstractCegarLoop]: Abstraction has has 409 places, 1608 transitions, 32168 flow [2024-11-23 18:46:59,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.208333333333334) internal successors, (269), 24 states have internal predecessors, (269), 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 18:46:59,907 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:46:59,907 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:46:59,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-23 18:47:00,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-23 18:47:00,108 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2024-11-23 18:47:00,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:47:00,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1790720305, now seen corresponding path program 7 times [2024-11-23 18:47:00,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 18:47:00,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310221051] [2024-11-23 18:47:00,108 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 18:47:00,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 18:47:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:47:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:47:01,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 18:47:01,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310221051] [2024-11-23 18:47:01,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310221051] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 18:47:01,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747956071] [2024-11-23 18:47:01,433 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 18:47:01,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:47:01,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:47:01,437 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:47:01,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30a798f3-18ac-414d-9e88-2f85e586bc2f/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-23 18:47:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:47:01,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-23 18:47:01,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:47:01,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-23 18:47:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:47:02,766 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:47:03,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 86 [2024-11-23 18:47:03,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:47:03,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 286 treesize of output 249 [2024-11-23 18:47:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:47:06,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747956071] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:47:06,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 18:47:06,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2024-11-23 18:47:06,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313978041] [2024-11-23 18:47:06,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 18:47:06,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-23 18:47:06,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 18:47:06,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-23 18:47:06,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2024-11-23 18:47:07,127 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-23 18:47:07,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 1608 transitions, 32168 flow. Second operand has 42 states, 42 states have (on average 9.142857142857142) internal successors, (384), 42 states have internal predecessors, (384), 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 18:47:07,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:47:07,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-23 18:47:07,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand