./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB --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 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:05:51,482 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:05:51,575 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-28 03:05:51,587 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:05:51,588 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:05:51,632 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:05:51,634 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:05:51,634 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:05:51,635 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:05:51,635 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:05:51,636 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:05:51,636 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:05:51,637 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:05:51,637 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:05:51,639 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:05:51,639 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:05:51,639 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:05:51,639 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:05:51,640 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:05:51,640 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:05:51,640 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:05:51,640 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:05:51,640 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:05:51,640 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:05:51,640 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-28 03:05:51,641 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:05:51,641 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:05:51,641 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:05:51,641 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:05:51,641 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:05:51,641 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:05:51,641 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:05:51,641 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:05:51,641 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:05:51,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:05:51,642 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:05:51,642 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:05:51,642 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:05:51,642 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:05:51,642 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:05:51,642 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:05:51,642 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:05:51,642 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:05:51,642 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:05:51,644 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:05:51,644 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:05:51,644 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:05:51,645 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:05:51,645 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:05:51,645 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:05:51,645 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_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2024-11-28 03:05:52,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:05:52,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:05:52,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:05:52,065 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:05:52,066 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:05:52,067 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2024-11-28 03:05:55,214 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/data/6f7bac4b0/9f4bcce77b6949f0b9ee78d321be8077/FLAG9f12fcd04 [2024-11-28 03:05:55,553 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:05:55,554 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2024-11-28 03:05:55,566 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/data/6f7bac4b0/9f4bcce77b6949f0b9ee78d321be8077/FLAG9f12fcd04 [2024-11-28 03:05:55,603 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/data/6f7bac4b0/9f4bcce77b6949f0b9ee78d321be8077 [2024-11-28 03:05:55,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:05:55,607 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:05:55,609 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:05:55,609 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:05:55,614 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:05:55,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:05:55" (1/1) ... [2024-11-28 03:05:55,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1470fa6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:55, skipping insertion in model container [2024-11-28 03:05:55,616 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:05:55" (1/1) ... [2024-11-28 03:05:55,642 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:05:55,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:05:55,979 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:05:56,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:05:56,056 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:05:56,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:56 WrapperNode [2024-11-28 03:05:56,057 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:05:56,058 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:05:56,058 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:05:56,058 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:05:56,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:56" (1/1) ... [2024-11-28 03:05:56,076 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:56" (1/1) ... [2024-11-28 03:05:56,102 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 170 [2024-11-28 03:05:56,103 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:05:56,103 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:05:56,103 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:05:56,103 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:05:56,115 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:56" (1/1) ... [2024-11-28 03:05:56,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:56" (1/1) ... [2024-11-28 03:05:56,119 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:56" (1/1) ... [2024-11-28 03:05:56,137 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]. [2024-11-28 03:05:56,138 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:56" (1/1) ... [2024-11-28 03:05:56,138 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:56" (1/1) ... [2024-11-28 03:05:56,145 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:56" (1/1) ... [2024-11-28 03:05:56,146 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:56" (1/1) ... [2024-11-28 03:05:56,152 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:56" (1/1) ... [2024-11-28 03:05:56,154 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:56" (1/1) ... [2024-11-28 03:05:56,155 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:56" (1/1) ... [2024-11-28 03:05:56,157 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:05:56,158 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:05:56,158 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:05:56,159 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:05:56,160 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:56" (1/1) ... [2024-11-28 03:05:56,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:05:56,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:56,200 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:05:56,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:05:56,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:05:56,238 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:05:56,238 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:05:56,238 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:05:56,239 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:05:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:05:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:05:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:05:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:05:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 03:05:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 03:05:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:05:56,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:05:56,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:05:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:05:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:05:56,243 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 03:05:56,376 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:05:56,379 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:05:56,866 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:05:56,867 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:05:57,263 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:05:57,264 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 03:05:57,264 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:57 BoogieIcfgContainer [2024-11-28 03:05:57,264 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:05:57,266 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:05:57,266 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:05:57,272 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:05:57,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:05:55" (1/3) ... [2024-11-28 03:05:57,273 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127f43f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:05:57, skipping insertion in model container [2024-11-28 03:05:57,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:56" (2/3) ... [2024-11-28 03:05:57,274 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@127f43f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:05:57, skipping insertion in model container [2024-11-28 03:05:57,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:57" (3/3) ... [2024-11-28 03:05:57,276 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2024-11-28 03:05:57,294 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:05:57,296 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-queue-add-2-nl.wvr.c that has 3 procedures, 40 locations, 1 initial locations, 3 loop locations, and 12 error locations. [2024-11-28 03:05:57,296 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:05:57,365 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 03:05:57,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 44 transitions, 102 flow [2024-11-28 03:05:57,465 INFO L124 PetriNetUnfolderBase]: 5/42 cut-off events. [2024-11-28 03:05:57,470 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:05:57,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 42 events. 5/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 112 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2024-11-28 03:05:57,477 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 44 transitions, 102 flow [2024-11-28 03:05:57,481 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 89 flow [2024-11-28 03:05:57,500 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:05:57,518 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;@32188ca6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:05:57,519 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-28 03:05:57,528 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:05:57,528 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2024-11-28 03:05:57,530 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:05:57,530 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:57,531 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:05:57,532 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:05:57,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:57,540 INFO L85 PathProgramCache]: Analyzing trace with hash 538793, now seen corresponding path program 1 times [2024-11-28 03:05:57,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:57,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601654039] [2024-11-28 03:05:57,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:05:57,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:05:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:05:57,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:57,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601654039] [2024-11-28 03:05:57,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601654039] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:05:57,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:05:57,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:05:57,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329698646] [2024-11-28 03:05:57,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:05:57,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:05:57,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:57,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:05:57,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:05:57,906 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-28 03:05:57,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 89 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) [2024-11-28 03:05:57,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:57,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-28 03:05:57,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:58,209 INFO L124 PetriNetUnfolderBase]: 184/425 cut-off events. [2024-11-28 03:05:58,209 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-28 03:05:58,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 425 events. 184/425 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2192 event pairs, 154 based on Foata normal form. 1/325 useless extension candidates. Maximal degree in co-relation 708. Up to 308 conditions per place. [2024-11-28 03:05:58,218 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 24 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-11-28 03:05:58,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 141 flow [2024-11-28 03:05:58,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:05:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:05:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-11-28 03:05:58,241 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-11-28 03:05:58,246 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 89 flow. Second operand 4 states and 83 transitions. [2024-11-28 03:05:58,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 141 flow [2024-11-28 03:05:58,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 136 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:05:58,258 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 103 flow [2024-11-28 03:05:58,262 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, 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=41, PETRI_TRANSITIONS=38} [2024-11-28 03:05:58,267 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2024-11-28 03:05:58,272 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 103 flow [2024-11-28 03:05:58,272 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) [2024-11-28 03:05:58,272 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:58,272 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-28 03:05:58,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:05:58,273 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:05:58,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:58,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1128177919, now seen corresponding path program 1 times [2024-11-28 03:05:58,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:58,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657772797] [2024-11-28 03:05:58,275 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:05:58,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:05:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:05:58,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:58,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657772797] [2024-11-28 03:05:58,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657772797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:05:58,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111283177] [2024-11-28 03:05:58,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:05:58,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:58,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:05:58,611 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:05:58,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:05:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:05:58,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:05:58,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:05:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:05:58,799 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:05:58,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111283177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:05:58,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:05:58,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-28 03:05:58,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80929504] [2024-11-28 03:05:58,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:05:58,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:05:58,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:58,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:05:58,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 03:05:58,819 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-28 03:05:58,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2024-11-28 03:05:58,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:58,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-28 03:05:58,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:59,123 INFO L124 PetriNetUnfolderBase]: 184/424 cut-off events. [2024-11-28 03:05:59,124 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 03:05:59,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767 conditions, 424 events. 184/424 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2196 event pairs, 154 based on Foata normal form. 1/325 useless extension candidates. Maximal degree in co-relation 740. Up to 303 conditions per place. [2024-11-28 03:05:59,132 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 20 selfloop transitions, 7 changer transitions 0/37 dead transitions. [2024-11-28 03:05:59,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 153 flow [2024-11-28 03:05:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:05:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:05:59,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-11-28 03:05:59,136 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-11-28 03:05:59,137 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 103 flow. Second operand 6 states and 100 transitions. [2024-11-28 03:05:59,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 153 flow [2024-11-28 03:05:59,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:05:59,141 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 110 flow [2024-11-28 03:05:59,143 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=39, 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=44, PETRI_TRANSITIONS=37} [2024-11-28 03:05:59,144 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-11-28 03:05:59,144 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 110 flow [2024-11-28 03:05:59,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2024-11-28 03:05:59,145 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:59,146 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 03:05:59,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:05:59,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:05:59,350 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:05:59,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:59,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1126149703, now seen corresponding path program 1 times [2024-11-28 03:05:59,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:59,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813098199] [2024-11-28 03:05:59,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:05:59,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:05:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:05:59,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:05:59,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813098199] [2024-11-28 03:05:59,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813098199] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:05:59,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:05:59,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:05:59,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879954699] [2024-11-28 03:05:59,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:05:59,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:05:59,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:05:59,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:05:59,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:05:59,614 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-11-28 03:05:59,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:59,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:05:59,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-11-28 03:05:59,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:05:59,836 INFO L124 PetriNetUnfolderBase]: 198/443 cut-off events. [2024-11-28 03:05:59,836 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-28 03:05:59,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 443 events. 198/443 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2162 event pairs, 167 based on Foata normal form. 17/366 useless extension candidates. Maximal degree in co-relation 728. Up to 305 conditions per place. [2024-11-28 03:05:59,844 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 23 selfloop transitions, 2 changer transitions 8/44 dead transitions. [2024-11-28 03:05:59,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 193 flow [2024-11-28 03:05:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:05:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:05:59,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-11-28 03:05:59,850 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5397727272727273 [2024-11-28 03:05:59,850 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 110 flow. Second operand 4 states and 95 transitions. [2024-11-28 03:05:59,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 193 flow [2024-11-28 03:05:59,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 171 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-28 03:05:59,854 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-11-28 03:05:59,854 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-11-28 03:05:59,855 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2024-11-28 03:05:59,856 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-11-28 03:05:59,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:05:59,856 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:05:59,857 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-28 03:05:59,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 03:05:59,857 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:05:59,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:05:59,858 INFO L85 PathProgramCache]: Analyzing trace with hash -613776609, now seen corresponding path program 1 times [2024-11-28 03:05:59,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:05:59,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575933813] [2024-11-28 03:05:59,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:05:59,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:05:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:00,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:00,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575933813] [2024-11-28 03:06:00,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575933813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:00,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473646363] [2024-11-28 03:06:00,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:00,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:00,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:00,020 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:00,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:06:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:00,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:06:00,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:00,150 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:00,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473646363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:00,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:00,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-28 03:06:00,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312393462] [2024-11-28 03:06:00,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:00,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:06:00,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:00,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:06:00,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:06:00,245 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-28 03:06:00,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 12 states, 12 states have (on average 13.083333333333334) internal successors, (157), 12 states have internal predecessors, (157), 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) [2024-11-28 03:06:00,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:00,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-28 03:06:00,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:00,525 INFO L124 PetriNetUnfolderBase]: 186/435 cut-off events. [2024-11-28 03:06:00,525 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-11-28 03:06:00,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 435 events. 186/435 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2271 event pairs, 154 based on Foata normal form. 3/336 useless extension candidates. Maximal degree in co-relation 866. Up to 309 conditions per place. [2024-11-28 03:06:00,530 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 23 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2024-11-28 03:06:00,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 202 flow [2024-11-28 03:06:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:06:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:06:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-11-28 03:06:00,533 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35909090909090907 [2024-11-28 03:06:00,533 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 10 states and 158 transitions. [2024-11-28 03:06:00,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 202 flow [2024-11-28 03:06:00,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 45 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:06:00,538 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 170 flow [2024-11-28 03:06:00,538 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=170, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-11-28 03:06:00,540 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-11-28 03:06:00,541 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 170 flow [2024-11-28 03:06:00,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.083333333333334) internal successors, (157), 12 states have internal predecessors, (157), 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) [2024-11-28 03:06:00,542 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:00,542 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:00,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 03:06:00,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:00,746 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:00,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:00,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1426756511, now seen corresponding path program 1 times [2024-11-28 03:06:00,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:00,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231539732] [2024-11-28 03:06:00,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:00,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:00,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:00,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231539732] [2024-11-28 03:06:00,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231539732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:00,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933287782] [2024-11-28 03:06:00,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:00,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:00,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:00,930 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:00,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:06:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:01,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:06:01,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:06:01,064 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:06:01,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933287782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:06:01,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:06:01,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2024-11-28 03:06:01,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950826117] [2024-11-28 03:06:01,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:06:01,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:06:01,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:01,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:06:01,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:06:01,066 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-11-28 03:06:01,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2024-11-28 03:06:01,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:01,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-11-28 03:06:01,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:01,167 INFO L124 PetriNetUnfolderBase]: 124/308 cut-off events. [2024-11-28 03:06:01,167 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-11-28 03:06:01,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 308 events. 124/308 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1443 event pairs, 98 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 581. Up to 214 conditions per place. [2024-11-28 03:06:01,174 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 30 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2024-11-28 03:06:01,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 220 flow [2024-11-28 03:06:01,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:06:01,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:06:01,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-28 03:06:01,176 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-11-28 03:06:01,176 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 170 flow. Second operand 3 states and 65 transitions. [2024-11-28 03:06:01,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 220 flow [2024-11-28 03:06:01,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 210 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-28 03:06:01,183 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 150 flow [2024-11-28 03:06:01,183 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-11-28 03:06:01,184 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-11-28 03:06:01,184 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 150 flow [2024-11-28 03:06:01,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2024-11-28 03:06:01,184 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:01,184 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:01,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:06:01,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:01,389 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:01,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:01,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1040665831, now seen corresponding path program 1 times [2024-11-28 03:06:01,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:01,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864147201] [2024-11-28 03:06:01,390 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:01,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:06:01,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:01,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864147201] [2024-11-28 03:06:01,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864147201] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:06:01,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:06:01,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:06:01,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866386285] [2024-11-28 03:06:01,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:06:01,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:06:01,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:01,498 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:06:01,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:06:01,498 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-11-28 03:06:01,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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) [2024-11-28 03:06:01,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:01,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-11-28 03:06:01,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:01,624 INFO L124 PetriNetUnfolderBase]: 133/311 cut-off events. [2024-11-28 03:06:01,625 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-28 03:06:01,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 311 events. 133/311 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1339 event pairs, 40 based on Foata normal form. 6/284 useless extension candidates. Maximal degree in co-relation 633. Up to 184 conditions per place. [2024-11-28 03:06:01,628 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 35 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2024-11-28 03:06:01,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 246 flow [2024-11-28 03:06:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:06:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:06:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-11-28 03:06:01,629 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-11-28 03:06:01,632 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 150 flow. Second operand 3 states and 70 transitions. [2024-11-28 03:06:01,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 246 flow [2024-11-28 03:06:01,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 245 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:06:01,635 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 172 flow [2024-11-28 03:06:01,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-11-28 03:06:01,638 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-11-28 03:06:01,638 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 172 flow [2024-11-28 03:06:01,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 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) [2024-11-28 03:06:01,638 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:01,638 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:01,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 03:06:01,639 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:01,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:01,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1018421916, now seen corresponding path program 1 times [2024-11-28 03:06:01,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:01,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660400405] [2024-11-28 03:06:01,639 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:01,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:06:01,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:01,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660400405] [2024-11-28 03:06:01,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660400405] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:06:01,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:06:01,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:06:01,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825110656] [2024-11-28 03:06:01,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:06:01,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:06:01,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:01,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:06:01,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:06:01,759 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-28 03:06:01,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2024-11-28 03:06:01,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:01,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-28 03:06:01,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:01,945 INFO L124 PetriNetUnfolderBase]: 189/408 cut-off events. [2024-11-28 03:06:01,946 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-11-28 03:06:01,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 408 events. 189/408 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1806 event pairs, 89 based on Foata normal form. 12/393 useless extension candidates. Maximal degree in co-relation 923. Up to 278 conditions per place. [2024-11-28 03:06:01,950 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 48 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2024-11-28 03:06:01,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 322 flow [2024-11-28 03:06:01,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:06:01,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:06:01,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-11-28 03:06:01,953 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-11-28 03:06:01,953 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 172 flow. Second operand 4 states and 90 transitions. [2024-11-28 03:06:01,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 322 flow [2024-11-28 03:06:01,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 305 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-28 03:06:01,959 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 188 flow [2024-11-28 03:06:01,959 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-11-28 03:06:01,960 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-11-28 03:06:01,960 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 188 flow [2024-11-28 03:06:01,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2024-11-28 03:06:01,960 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:01,965 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:01,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 03:06:01,965 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:01,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1420407982, now seen corresponding path program 1 times [2024-11-28 03:06:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:01,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962896663] [2024-11-28 03:06:01,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:01,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:02,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:02,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962896663] [2024-11-28 03:06:02,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962896663] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:02,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022098384] [2024-11-28 03:06:02,775 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:02,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:02,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:02,777 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:02,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:06:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:02,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:06:02,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:02,947 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 [2024-11-28 03:06:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:03,258 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:03,948 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 40 treesize of output 36 [2024-11-28 03:06:03,970 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:06:03,971 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 50 treesize of output 41 [2024-11-28 03:06:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:04,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022098384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:04,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:04,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-28 03:06:04,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139088927] [2024-11-28 03:06:04,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:04,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:06:04,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:04,065 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:06:04,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:06:04,271 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-28 03:06:04,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 188 flow. Second operand has 23 states, 23 states have (on average 9.565217391304348) internal successors, (220), 23 states have internal predecessors, (220), 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) [2024-11-28 03:06:04,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:04,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-28 03:06:04,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:07,479 INFO L124 PetriNetUnfolderBase]: 1302/2541 cut-off events. [2024-11-28 03:06:07,480 INFO L125 PetriNetUnfolderBase]: For 850/946 co-relation queries the response was YES. [2024-11-28 03:06:07,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6013 conditions, 2541 events. 1302/2541 cut-off events. For 850/946 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 15237 event pairs, 188 based on Foata normal form. 74/2452 useless extension candidates. Maximal degree in co-relation 5998. Up to 416 conditions per place. [2024-11-28 03:06:07,511 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 215 selfloop transitions, 66 changer transitions 2/289 dead transitions. [2024-11-28 03:06:07,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 289 transitions, 1573 flow [2024-11-28 03:06:07,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 03:06:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 03:06:07,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 498 transitions. [2024-11-28 03:06:07,517 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4042207792207792 [2024-11-28 03:06:07,517 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 188 flow. Second operand 28 states and 498 transitions. [2024-11-28 03:06:07,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 289 transitions, 1573 flow [2024-11-28 03:06:07,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 289 transitions, 1555 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:06:07,536 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 723 flow [2024-11-28 03:06:07,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=723, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2024-11-28 03:06:07,537 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-11-28 03:06:07,537 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 723 flow [2024-11-28 03:06:07,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.565217391304348) internal successors, (220), 23 states have internal predecessors, (220), 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) [2024-11-28 03:06:07,540 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:07,541 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:07,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:06:07,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 03:06:07,745 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:07,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:07,746 INFO L85 PathProgramCache]: Analyzing trace with hash -986350546, now seen corresponding path program 2 times [2024-11-28 03:06:07,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:07,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152518259] [2024-11-28 03:06:07,746 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:06:07,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:07,774 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:06:07,775 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:08,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:08,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152518259] [2024-11-28 03:06:08,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152518259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:08,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047953707] [2024-11-28 03:06:08,239 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:06:08,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:08,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:08,241 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:08,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:06:08,337 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:06:08,338 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:08,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 03:06:08,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:08,398 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 [2024-11-28 03:06:08,849 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:06:08,849 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 25 treesize of output 12 [2024-11-28 03:06:08,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:08,885 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:09,265 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 [2024-11-28 03:06:09,273 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 [2024-11-28 03:06:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:09,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047953707] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:09,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:09,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-28 03:06:09,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068834250] [2024-11-28 03:06:09,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:09,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:06:09,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:09,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:06:09,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:06:09,556 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-28 03:06:09,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 108 transitions, 723 flow. Second operand has 23 states, 23 states have (on average 9.565217391304348) internal successors, (220), 23 states have internal predecessors, (220), 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) [2024-11-28 03:06:09,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:09,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-28 03:06:09,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:13,936 INFO L124 PetriNetUnfolderBase]: 2610/5148 cut-off events. [2024-11-28 03:06:13,936 INFO L125 PetriNetUnfolderBase]: For 25501/25667 co-relation queries the response was YES. [2024-11-28 03:06:13,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18751 conditions, 5148 events. 2610/5148 cut-off events. For 25501/25667 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 34846 event pairs, 292 based on Foata normal form. 194/5341 useless extension candidates. Maximal degree in co-relation 18715. Up to 1393 conditions per place. [2024-11-28 03:06:14,000 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 277 selfloop transitions, 108 changer transitions 2/393 dead transitions. [2024-11-28 03:06:14,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 393 transitions, 3308 flow [2024-11-28 03:06:14,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 03:06:14,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 03:06:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 466 transitions. [2024-11-28 03:06:14,005 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3782467532467532 [2024-11-28 03:06:14,005 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 723 flow. Second operand 28 states and 466 transitions. [2024-11-28 03:06:14,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 393 transitions, 3308 flow [2024-11-28 03:06:14,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 393 transitions, 3139 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-11-28 03:06:14,173 INFO L231 Difference]: Finished difference. Result has 137 places, 189 transitions, 1751 flow [2024-11-28 03:06:14,175 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1751, PETRI_PLACES=137, PETRI_TRANSITIONS=189} [2024-11-28 03:06:14,176 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-11-28 03:06:14,176 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 189 transitions, 1751 flow [2024-11-28 03:06:14,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.565217391304348) internal successors, (220), 23 states have internal predecessors, (220), 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) [2024-11-28 03:06:14,178 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:14,179 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:14,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 03:06:14,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:14,379 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:14,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:14,380 INFO L85 PathProgramCache]: Analyzing trace with hash -512095284, now seen corresponding path program 1 times [2024-11-28 03:06:14,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:14,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479053019] [2024-11-28 03:06:14,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:14,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:14,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:14,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479053019] [2024-11-28 03:06:14,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479053019] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:14,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181245987] [2024-11-28 03:06:14,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:14,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:14,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:14,989 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:14,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:06:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:15,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:06:15,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:15,116 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 [2024-11-28 03:06:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:15,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:15,858 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 38 treesize of output 34 [2024-11-28 03:06:15,877 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:06:15,877 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 46 treesize of output 37 [2024-11-28 03:06:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:15,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181245987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:15,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:15,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-28 03:06:15,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363689981] [2024-11-28 03:06:15,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:15,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:06:15,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:15,943 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:06:15,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:06:16,139 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 03:06:16,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 189 transitions, 1751 flow. Second operand has 23 states, 23 states have (on average 10.565217391304348) internal successors, (243), 23 states have internal predecessors, (243), 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) [2024-11-28 03:06:16,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:16,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 03:06:16,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:18,545 INFO L124 PetriNetUnfolderBase]: 2304/4982 cut-off events. [2024-11-28 03:06:18,546 INFO L125 PetriNetUnfolderBase]: For 40347/40499 co-relation queries the response was YES. [2024-11-28 03:06:18,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19894 conditions, 4982 events. 2304/4982 cut-off events. For 40347/40499 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 36665 event pairs, 379 based on Foata normal form. 173/5095 useless extension candidates. Maximal degree in co-relation 19843. Up to 883 conditions per place. [2024-11-28 03:06:18,659 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 176 selfloop transitions, 146 changer transitions 0/343 dead transitions. [2024-11-28 03:06:18,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 343 transitions, 3476 flow [2024-11-28 03:06:18,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 03:06:18,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 03:06:18,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 323 transitions. [2024-11-28 03:06:18,663 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-11-28 03:06:18,663 INFO L175 Difference]: Start difference. First operand has 137 places, 189 transitions, 1751 flow. Second operand 19 states and 323 transitions. [2024-11-28 03:06:18,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 343 transitions, 3476 flow [2024-11-28 03:06:18,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 343 transitions, 3278 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-11-28 03:06:18,865 INFO L231 Difference]: Finished difference. Result has 158 places, 224 transitions, 2523 flow [2024-11-28 03:06:18,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2523, PETRI_PLACES=158, PETRI_TRANSITIONS=224} [2024-11-28 03:06:18,867 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-11-28 03:06:18,867 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 224 transitions, 2523 flow [2024-11-28 03:06:18,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.565217391304348) internal successors, (243), 23 states have internal predecessors, (243), 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) [2024-11-28 03:06:18,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:18,868 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:18,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 03:06:19,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:19,068 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:19,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:19,069 INFO L85 PathProgramCache]: Analyzing trace with hash -474439460, now seen corresponding path program 1 times [2024-11-28 03:06:19,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:19,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979964211] [2024-11-28 03:06:19,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:19,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:19,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:19,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979964211] [2024-11-28 03:06:19,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979964211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:19,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935935518] [2024-11-28 03:06:19,876 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:19,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:19,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:19,879 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:19,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:06:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:19,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:06:19,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:20,024 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 [2024-11-28 03:06:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:20,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:20,839 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 38 treesize of output 34 [2024-11-28 03:06:20,853 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:06:20,853 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 46 treesize of output 37 [2024-11-28 03:06:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:20,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935935518] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:20,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:20,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-28 03:06:20,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179269222] [2024-11-28 03:06:20,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:20,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:06:20,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:20,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:06:20,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:06:21,196 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 03:06:21,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 224 transitions, 2523 flow. Second operand has 23 states, 23 states have (on average 10.695652173913043) internal successors, (246), 23 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:06:21,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:21,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 03:06:21,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:24,145 INFO L124 PetriNetUnfolderBase]: 2445/5223 cut-off events. [2024-11-28 03:06:24,145 INFO L125 PetriNetUnfolderBase]: For 52383/52541 co-relation queries the response was YES. [2024-11-28 03:06:24,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23877 conditions, 5223 events. 2445/5223 cut-off events. For 52383/52541 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 38441 event pairs, 357 based on Foata normal form. 46/5213 useless extension candidates. Maximal degree in co-relation 23817. Up to 1365 conditions per place. [2024-11-28 03:06:24,214 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 180 selfloop transitions, 190 changer transitions 4/395 dead transitions. [2024-11-28 03:06:24,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 395 transitions, 4460 flow [2024-11-28 03:06:24,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 03:06:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-28 03:06:24,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 432 transitions. [2024-11-28 03:06:24,222 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-28 03:06:24,224 INFO L175 Difference]: Start difference. First operand has 158 places, 224 transitions, 2523 flow. Second operand 27 states and 432 transitions. [2024-11-28 03:06:24,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 395 transitions, 4460 flow [2024-11-28 03:06:24,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 395 transitions, 4379 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-11-28 03:06:24,527 INFO L231 Difference]: Finished difference. Result has 187 places, 265 transitions, 3692 flow [2024-11-28 03:06:24,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2464, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3692, PETRI_PLACES=187, PETRI_TRANSITIONS=265} [2024-11-28 03:06:24,528 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-11-28 03:06:24,528 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 265 transitions, 3692 flow [2024-11-28 03:06:24,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.695652173913043) internal successors, (246), 23 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:06:24,529 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:24,529 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-28 03:06:24,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 03:06:24,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:24,732 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:24,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:24,733 INFO L85 PathProgramCache]: Analyzing trace with hash 231693431, now seen corresponding path program 2 times [2024-11-28 03:06:24,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:24,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022264837] [2024-11-28 03:06:24,733 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:06:24,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:24,750 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:06:24,750 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 03:06:24,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:24,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022264837] [2024-11-28 03:06:24,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022264837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:24,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404683234] [2024-11-28 03:06:24,808 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:06:24,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:24,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:24,811 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:24,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:06:24,893 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:06:24,893 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:24,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:06:24,895 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 03:06:24,923 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-28 03:06:24,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404683234] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:24,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:24,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2024-11-28 03:06:24,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301822641] [2024-11-28 03:06:24,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:24,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:06:24,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:24,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:06:24,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:06:24,958 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-28 03:06:24,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 265 transitions, 3692 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-11-28 03:06:24,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:24,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-28 03:06:24,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:26,022 INFO L124 PetriNetUnfolderBase]: 2008/4667 cut-off events. [2024-11-28 03:06:26,022 INFO L125 PetriNetUnfolderBase]: For 57498/57675 co-relation queries the response was YES. [2024-11-28 03:06:26,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23021 conditions, 4667 events. 2008/4667 cut-off events. For 57498/57675 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 35576 event pairs, 1257 based on Foata normal form. 13/4639 useless extension candidates. Maximal degree in co-relation 22951. Up to 3394 conditions per place. [2024-11-28 03:06:26,064 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 220 selfloop transitions, 15 changer transitions 0/264 dead transitions. [2024-11-28 03:06:26,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 264 transitions, 4152 flow [2024-11-28 03:06:26,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:06:26,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:06:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-11-28 03:06:26,066 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39204545454545453 [2024-11-28 03:06:26,066 INFO L175 Difference]: Start difference. First operand has 187 places, 265 transitions, 3692 flow. Second operand 4 states and 69 transitions. [2024-11-28 03:06:26,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 264 transitions, 4152 flow [2024-11-28 03:06:26,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 264 transitions, 3743 flow, removed 108 selfloop flow, removed 19 redundant places. [2024-11-28 03:06:26,513 INFO L231 Difference]: Finished difference. Result has 170 places, 264 transitions, 3303 flow [2024-11-28 03:06:26,514 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3273, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3303, PETRI_PLACES=170, PETRI_TRANSITIONS=264} [2024-11-28 03:06:26,515 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-11-28 03:06:26,515 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 264 transitions, 3303 flow [2024-11-28 03:06:26,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-11-28 03:06:26,515 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:26,515 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:26,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 03:06:26,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 03:06:26,716 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:26,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:26,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1289192366, now seen corresponding path program 1 times [2024-11-28 03:06:26,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:26,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434543536] [2024-11-28 03:06:26,717 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:26,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:26,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:26,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434543536] [2024-11-28 03:06:26,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434543536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:26,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676120076] [2024-11-28 03:06:26,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:26,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:26,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:26,895 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:26,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:06:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:26,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:06:26,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:27,091 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:27,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676120076] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:27,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:27,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-28 03:06:27,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419597898] [2024-11-28 03:06:27,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:27,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:06:27,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:27,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:06:27,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:06:27,238 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-28 03:06:27,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 264 transitions, 3303 flow. Second operand has 15 states, 15 states have (on average 13.8) internal successors, (207), 15 states have internal predecessors, (207), 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) [2024-11-28 03:06:27,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:27,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-28 03:06:27,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:27,705 INFO L124 PetriNetUnfolderBase]: 552/1291 cut-off events. [2024-11-28 03:06:27,705 INFO L125 PetriNetUnfolderBase]: For 9861/9899 co-relation queries the response was YES. [2024-11-28 03:06:27,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5740 conditions, 1291 events. 552/1291 cut-off events. For 9861/9899 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8338 event pairs, 338 based on Foata normal form. 74/1333 useless extension candidates. Maximal degree in co-relation 5689. Up to 557 conditions per place. [2024-11-28 03:06:27,722 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 73 selfloop transitions, 15 changer transitions 1/107 dead transitions. [2024-11-28 03:06:27,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 107 transitions, 1167 flow [2024-11-28 03:06:27,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:06:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:06:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-11-28 03:06:27,726 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-11-28 03:06:27,726 INFO L175 Difference]: Start difference. First operand has 170 places, 264 transitions, 3303 flow. Second operand 8 states and 144 transitions. [2024-11-28 03:06:27,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 107 transitions, 1167 flow [2024-11-28 03:06:27,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 107 transitions, 984 flow, removed 41 selfloop flow, removed 26 redundant places. [2024-11-28 03:06:27,782 INFO L231 Difference]: Finished difference. Result has 125 places, 92 transitions, 788 flow [2024-11-28 03:06:27,782 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=788, PETRI_PLACES=125, PETRI_TRANSITIONS=92} [2024-11-28 03:06:27,785 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-11-28 03:06:27,785 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 92 transitions, 788 flow [2024-11-28 03:06:27,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 13.8) internal successors, (207), 15 states have internal predecessors, (207), 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) [2024-11-28 03:06:27,785 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:27,785 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:27,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 03:06:27,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 03:06:27,990 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:27,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:27,991 INFO L85 PathProgramCache]: Analyzing trace with hash 255639774, now seen corresponding path program 3 times [2024-11-28 03:06:27,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:27,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12650172] [2024-11-28 03:06:27,991 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:06:27,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:28,014 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:06:28,014 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:06:28,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:28,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12650172] [2024-11-28 03:06:28,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12650172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:06:28,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:06:28,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:06:28,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493004238] [2024-11-28 03:06:28,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:06:28,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:06:28,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:28,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:06:28,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:06:28,168 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-28 03:06:28,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 92 transitions, 788 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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) [2024-11-28 03:06:28,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:28,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-28 03:06:28,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:28,606 INFO L124 PetriNetUnfolderBase]: 719/1604 cut-off events. [2024-11-28 03:06:28,606 INFO L125 PetriNetUnfolderBase]: For 6117/6141 co-relation queries the response was YES. [2024-11-28 03:06:28,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6163 conditions, 1604 events. 719/1604 cut-off events. For 6117/6141 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10174 event pairs, 123 based on Foata normal form. 34/1631 useless extension candidates. Maximal degree in co-relation 6129. Up to 643 conditions per place. [2024-11-28 03:06:28,625 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 91 selfloop transitions, 19 changer transitions 0/123 dead transitions. [2024-11-28 03:06:28,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 123 transitions, 1163 flow [2024-11-28 03:06:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:06:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:06:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-11-28 03:06:28,627 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2024-11-28 03:06:28,627 INFO L175 Difference]: Start difference. First operand has 125 places, 92 transitions, 788 flow. Second operand 5 states and 113 transitions. [2024-11-28 03:06:28,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 123 transitions, 1163 flow [2024-11-28 03:06:28,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 123 transitions, 1137 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 03:06:28,663 INFO L231 Difference]: Finished difference. Result has 124 places, 94 transitions, 830 flow [2024-11-28 03:06:28,663 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=830, PETRI_PLACES=124, PETRI_TRANSITIONS=94} [2024-11-28 03:06:28,663 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-11-28 03:06:28,664 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 94 transitions, 830 flow [2024-11-28 03:06:28,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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) [2024-11-28 03:06:28,664 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:28,664 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:28,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-28 03:06:28,664 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:28,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:28,665 INFO L85 PathProgramCache]: Analyzing trace with hash 244053958, now seen corresponding path program 1 times [2024-11-28 03:06:28,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:28,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896236347] [2024-11-28 03:06:28,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:28,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:29,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:29,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896236347] [2024-11-28 03:06:29,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896236347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:29,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805857640] [2024-11-28 03:06:29,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:29,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:29,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:29,673 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:29,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:06:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:29,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:06:29,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:06:29,976 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:30,030 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:06:30,030 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 [2024-11-28 03:06:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:06:30,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805857640] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:30,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:06:30,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 6] total 18 [2024-11-28 03:06:30,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989424456] [2024-11-28 03:06:30,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:06:30,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:06:30,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:30,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:06:30,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:06:30,100 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 03:06:30,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 94 transitions, 830 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2024-11-28 03:06:30,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:30,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 03:06:30,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:30,445 INFO L124 PetriNetUnfolderBase]: 976/1906 cut-off events. [2024-11-28 03:06:30,445 INFO L125 PetriNetUnfolderBase]: For 6955/7003 co-relation queries the response was YES. [2024-11-28 03:06:30,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7488 conditions, 1906 events. 976/1906 cut-off events. For 6955/7003 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11228 event pairs, 39 based on Foata normal form. 10/1912 useless extension candidates. Maximal degree in co-relation 7453. Up to 835 conditions per place. [2024-11-28 03:06:30,457 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 77 selfloop transitions, 38 changer transitions 0/121 dead transitions. [2024-11-28 03:06:30,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 121 transitions, 1192 flow [2024-11-28 03:06:30,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:06:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:06:30,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-11-28 03:06:30,459 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-11-28 03:06:30,459 INFO L175 Difference]: Start difference. First operand has 124 places, 94 transitions, 830 flow. Second operand 5 states and 100 transitions. [2024-11-28 03:06:30,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 121 transitions, 1192 flow [2024-11-28 03:06:30,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 121 transitions, 1151 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-28 03:06:30,493 INFO L231 Difference]: Finished difference. Result has 127 places, 98 transitions, 972 flow [2024-11-28 03:06:30,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=972, PETRI_PLACES=127, PETRI_TRANSITIONS=98} [2024-11-28 03:06:30,493 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-11-28 03:06:30,494 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 98 transitions, 972 flow [2024-11-28 03:06:30,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2024-11-28 03:06:30,494 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:30,494 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:30,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 03:06:30,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 03:06:30,695 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:30,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash 668337088, now seen corresponding path program 2 times [2024-11-28 03:06:30,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:30,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963334195] [2024-11-28 03:06:30,696 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:06:30,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:30,714 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:06:30,714 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:06:30,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:30,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963334195] [2024-11-28 03:06:30,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963334195] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:06:30,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:06:30,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:06:30,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109985879] [2024-11-28 03:06:30,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:06:30,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:06:30,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:30,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:06:30,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:06:30,860 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-28 03:06:30,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 98 transitions, 972 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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) [2024-11-28 03:06:30,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:30,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-28 03:06:30,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:31,232 INFO L124 PetriNetUnfolderBase]: 787/1701 cut-off events. [2024-11-28 03:06:31,233 INFO L125 PetriNetUnfolderBase]: For 8907/8932 co-relation queries the response was YES. [2024-11-28 03:06:31,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7324 conditions, 1701 events. 787/1701 cut-off events. For 8907/8932 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10699 event pairs, 141 based on Foata normal form. 17/1707 useless extension candidates. Maximal degree in co-relation 7288. Up to 757 conditions per place. [2024-11-28 03:06:31,249 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 89 selfloop transitions, 20 changer transitions 0/126 dead transitions. [2024-11-28 03:06:31,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 126 transitions, 1329 flow [2024-11-28 03:06:31,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:06:31,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:06:31,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-11-28 03:06:31,250 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2024-11-28 03:06:31,251 INFO L175 Difference]: Start difference. First operand has 127 places, 98 transitions, 972 flow. Second operand 5 states and 111 transitions. [2024-11-28 03:06:31,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 126 transitions, 1329 flow [2024-11-28 03:06:31,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 126 transitions, 1293 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-28 03:06:31,284 INFO L231 Difference]: Finished difference. Result has 130 places, 99 transitions, 1002 flow [2024-11-28 03:06:31,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1002, PETRI_PLACES=130, PETRI_TRANSITIONS=99} [2024-11-28 03:06:31,285 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-11-28 03:06:31,285 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 99 transitions, 1002 flow [2024-11-28 03:06:31,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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) [2024-11-28 03:06:31,286 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:31,286 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:31,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 03:06:31,286 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:31,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:31,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1030517434, now seen corresponding path program 2 times [2024-11-28 03:06:31,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:31,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004104285] [2024-11-28 03:06:31,287 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:06:31,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:31,302 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:06:31,302 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:06:31,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:31,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004104285] [2024-11-28 03:06:31,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004104285] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:06:31,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:06:31,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:06:31,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784910431] [2024-11-28 03:06:31,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:06:31,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:06:31,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:31,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:06:31,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:06:31,430 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-28 03:06:31,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 99 transitions, 1002 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2024-11-28 03:06:31,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:31,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-28 03:06:31,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:31,816 INFO L124 PetriNetUnfolderBase]: 905/1900 cut-off events. [2024-11-28 03:06:31,816 INFO L125 PetriNetUnfolderBase]: For 10097/10126 co-relation queries the response was YES. [2024-11-28 03:06:31,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8128 conditions, 1900 events. 905/1900 cut-off events. For 10097/10126 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12029 event pairs, 316 based on Foata normal form. 15/1907 useless extension candidates. Maximal degree in co-relation 8090. Up to 1318 conditions per place. [2024-11-28 03:06:31,830 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 78 selfloop transitions, 14 changer transitions 10/118 dead transitions. [2024-11-28 03:06:31,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 118 transitions, 1289 flow [2024-11-28 03:06:31,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:06:31,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:06:31,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-11-28 03:06:31,832 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4356060606060606 [2024-11-28 03:06:31,832 INFO L175 Difference]: Start difference. First operand has 130 places, 99 transitions, 1002 flow. Second operand 6 states and 115 transitions. [2024-11-28 03:06:31,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 118 transitions, 1289 flow [2024-11-28 03:06:31,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 118 transitions, 1252 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-28 03:06:31,879 INFO L231 Difference]: Finished difference. Result has 134 places, 94 transitions, 948 flow [2024-11-28 03:06:31,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=948, PETRI_PLACES=134, PETRI_TRANSITIONS=94} [2024-11-28 03:06:31,880 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-11-28 03:06:31,881 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 94 transitions, 948 flow [2024-11-28 03:06:31,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2024-11-28 03:06:31,881 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:31,881 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:31,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 03:06:31,881 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:31,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:31,882 INFO L85 PathProgramCache]: Analyzing trace with hash 711986051, now seen corresponding path program 1 times [2024-11-28 03:06:31,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:31,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815682719] [2024-11-28 03:06:31,883 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:31,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:32,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:32,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815682719] [2024-11-28 03:06:32,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815682719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:32,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514951751] [2024-11-28 03:06:32,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:32,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:32,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:32,037 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:32,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:06:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:32,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 03:06:32,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:06:32,182 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:06:32,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514951751] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:06:32,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:06:32,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-11-28 03:06:32,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929393198] [2024-11-28 03:06:32,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:06:32,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:06:32,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:32,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:06:32,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 03:06:32,184 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-11-28 03:06:32,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 94 transitions, 948 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2024-11-28 03:06:32,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:32,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-11-28 03:06:32,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:32,492 INFO L124 PetriNetUnfolderBase]: 795/1820 cut-off events. [2024-11-28 03:06:32,493 INFO L125 PetriNetUnfolderBase]: For 10165/10259 co-relation queries the response was YES. [2024-11-28 03:06:32,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7660 conditions, 1820 events. 795/1820 cut-off events. For 10165/10259 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11306 event pairs, 193 based on Foata normal form. 52/1862 useless extension candidates. Maximal degree in co-relation 7620. Up to 522 conditions per place. [2024-11-28 03:06:32,509 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 70 selfloop transitions, 21 changer transitions 17/120 dead transitions. [2024-11-28 03:06:32,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 120 transitions, 1260 flow [2024-11-28 03:06:32,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:06:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:06:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-28 03:06:32,510 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-11-28 03:06:32,510 INFO L175 Difference]: Start difference. First operand has 134 places, 94 transitions, 948 flow. Second operand 4 states and 104 transitions. [2024-11-28 03:06:32,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 120 transitions, 1260 flow [2024-11-28 03:06:32,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 120 transitions, 1169 flow, removed 19 selfloop flow, removed 14 redundant places. [2024-11-28 03:06:32,542 INFO L231 Difference]: Finished difference. Result has 118 places, 77 transitions, 738 flow [2024-11-28 03:06:32,543 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=738, PETRI_PLACES=118, PETRI_TRANSITIONS=77} [2024-11-28 03:06:32,543 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-11-28 03:06:32,543 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 77 transitions, 738 flow [2024-11-28 03:06:32,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 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) [2024-11-28 03:06:32,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:32,544 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:32,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:06:32,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:06:32,744 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:32,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:32,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1153800966, now seen corresponding path program 2 times [2024-11-28 03:06:32,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:32,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047809627] [2024-11-28 03:06:32,746 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:06:32,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:32,763 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:06:32,764 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 03:06:32,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:32,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047809627] [2024-11-28 03:06:32,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047809627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:06:32,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:06:32,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:06:32,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944524019] [2024-11-28 03:06:32,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:06:32,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:06:32,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:32,808 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:06:32,808 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:06:32,815 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-28 03:06:32,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 77 transitions, 738 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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) [2024-11-28 03:06:32,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:32,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-28 03:06:32,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:33,132 INFO L124 PetriNetUnfolderBase]: 825/1667 cut-off events. [2024-11-28 03:06:33,133 INFO L125 PetriNetUnfolderBase]: For 11598/11676 co-relation queries the response was YES. [2024-11-28 03:06:33,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7563 conditions, 1667 events. 825/1667 cut-off events. For 11598/11676 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 9521 event pairs, 239 based on Foata normal form. 58/1667 useless extension candidates. Maximal degree in co-relation 7527. Up to 604 conditions per place. [2024-11-28 03:06:33,150 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 101 selfloop transitions, 7 changer transitions 1/118 dead transitions. [2024-11-28 03:06:33,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 118 transitions, 1513 flow [2024-11-28 03:06:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:06:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:06:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2024-11-28 03:06:33,152 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-11-28 03:06:33,152 INFO L175 Difference]: Start difference. First operand has 118 places, 77 transitions, 738 flow. Second operand 4 states and 81 transitions. [2024-11-28 03:06:33,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 118 transitions, 1513 flow [2024-11-28 03:06:33,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 118 transitions, 1430 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-11-28 03:06:33,177 INFO L231 Difference]: Finished difference. Result has 94 places, 76 transitions, 699 flow [2024-11-28 03:06:33,177 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=699, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2024-11-28 03:06:33,178 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-11-28 03:06:33,178 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 699 flow [2024-11-28 03:06:33,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 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) [2024-11-28 03:06:33,178 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:33,178 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:33,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-28 03:06:33,179 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:33,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:33,179 INFO L85 PathProgramCache]: Analyzing trace with hash -602033758, now seen corresponding path program 2 times [2024-11-28 03:06:33,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:33,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056575410] [2024-11-28 03:06:33,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:06:33,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:33,208 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:06:33,208 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:06:33,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:33,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056575410] [2024-11-28 03:06:33,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056575410] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:06:33,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:06:33,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:06:33,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487659966] [2024-11-28 03:06:33,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:06:33,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:06:33,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:33,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:06:33,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:06:33,347 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-11-28 03:06:33,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 699 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2024-11-28 03:06:33,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:33,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-11-28 03:06:33,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:33,721 INFO L124 PetriNetUnfolderBase]: 955/1847 cut-off events. [2024-11-28 03:06:33,721 INFO L125 PetriNetUnfolderBase]: For 8876/8922 co-relation queries the response was YES. [2024-11-28 03:06:33,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7953 conditions, 1847 events. 955/1847 cut-off events. For 8876/8922 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10045 event pairs, 350 based on Foata normal form. 5/1844 useless extension candidates. Maximal degree in co-relation 7920. Up to 1464 conditions per place. [2024-11-28 03:06:33,732 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 67 selfloop transitions, 6 changer transitions 13/93 dead transitions. [2024-11-28 03:06:33,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 93 transitions, 926 flow [2024-11-28 03:06:33,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:06:33,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:06:33,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-11-28 03:06:33,733 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4128787878787879 [2024-11-28 03:06:33,733 INFO L175 Difference]: Start difference. First operand has 94 places, 76 transitions, 699 flow. Second operand 6 states and 109 transitions. [2024-11-28 03:06:33,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 93 transitions, 926 flow [2024-11-28 03:06:33,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 93 transitions, 912 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:06:33,747 INFO L231 Difference]: Finished difference. Result has 97 places, 74 transitions, 679 flow [2024-11-28 03:06:33,747 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=679, PETRI_PLACES=97, PETRI_TRANSITIONS=74} [2024-11-28 03:06:33,748 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-11-28 03:06:33,748 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 74 transitions, 679 flow [2024-11-28 03:06:33,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2024-11-28 03:06:33,748 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:33,748 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:33,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-28 03:06:33,748 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:33,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1408091019, now seen corresponding path program 1 times [2024-11-28 03:06:33,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:33,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467002466] [2024-11-28 03:06:33,749 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:33,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 03:06:33,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:33,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467002466] [2024-11-28 03:06:33,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467002466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:33,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745803448] [2024-11-28 03:06:33,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:33,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:33,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:33,826 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:33,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:06:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:33,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 03:06:33,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 03:06:33,957 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 03:06:34,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745803448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:34,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:34,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-28 03:06:34,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806908816] [2024-11-28 03:06:34,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:34,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:06:34,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:34,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:06:34,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:06:34,040 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-28 03:06:34,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 74 transitions, 679 flow. Second operand has 12 states, 12 states have (on average 13.916666666666666) internal successors, (167), 12 states have internal predecessors, (167), 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) [2024-11-28 03:06:34,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:34,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-28 03:06:34,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:34,565 INFO L124 PetriNetUnfolderBase]: 1242/2646 cut-off events. [2024-11-28 03:06:34,565 INFO L125 PetriNetUnfolderBase]: For 14235/14331 co-relation queries the response was YES. [2024-11-28 03:06:34,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10511 conditions, 2646 events. 1242/2646 cut-off events. For 14235/14331 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 15647 event pairs, 295 based on Foata normal form. 0/2587 useless extension candidates. Maximal degree in co-relation 10477. Up to 1115 conditions per place. [2024-11-28 03:06:34,587 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 192 selfloop transitions, 13 changer transitions 0/215 dead transitions. [2024-11-28 03:06:34,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 215 transitions, 2612 flow [2024-11-28 03:06:34,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:06:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:06:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-11-28 03:06:34,588 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-11-28 03:06:34,589 INFO L175 Difference]: Start difference. First operand has 97 places, 74 transitions, 679 flow. Second operand 10 states and 214 transitions. [2024-11-28 03:06:34,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 215 transitions, 2612 flow [2024-11-28 03:06:34,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 215 transitions, 2584 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-28 03:06:34,612 INFO L231 Difference]: Finished difference. Result has 99 places, 83 transitions, 739 flow [2024-11-28 03:06:34,613 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=739, PETRI_PLACES=99, PETRI_TRANSITIONS=83} [2024-11-28 03:06:34,613 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-11-28 03:06:34,613 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 83 transitions, 739 flow [2024-11-28 03:06:34,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.916666666666666) internal successors, (167), 12 states have internal predecessors, (167), 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) [2024-11-28 03:06:34,614 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:34,614 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:34,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 03:06:34,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 03:06:34,817 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:34,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:34,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1476920634, now seen corresponding path program 3 times [2024-11-28 03:06:34,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:34,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382956536] [2024-11-28 03:06:34,818 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:06:34,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:34,836 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:06:34,836 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 03:06:34,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:34,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382956536] [2024-11-28 03:06:34,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382956536] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:06:34,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:06:34,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:06:34,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903273668] [2024-11-28 03:06:34,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:06:34,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:06:34,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:34,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:06:34,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 03:06:34,955 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-11-28 03:06:34,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 83 transitions, 739 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2024-11-28 03:06:34,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:34,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-11-28 03:06:34,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:35,470 INFO L124 PetriNetUnfolderBase]: 1651/3250 cut-off events. [2024-11-28 03:06:35,471 INFO L125 PetriNetUnfolderBase]: For 15217/15306 co-relation queries the response was YES. [2024-11-28 03:06:35,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13546 conditions, 3250 events. 1651/3250 cut-off events. For 15217/15306 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 18659 event pairs, 580 based on Foata normal form. 10/3256 useless extension candidates. Maximal degree in co-relation 13512. Up to 2578 conditions per place. [2024-11-28 03:06:35,506 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 71 selfloop transitions, 4 changer transitions 14/97 dead transitions. [2024-11-28 03:06:35,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 97 transitions, 965 flow [2024-11-28 03:06:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:06:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:06:35,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-11-28 03:06:35,507 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-28 03:06:35,507 INFO L175 Difference]: Start difference. First operand has 99 places, 83 transitions, 739 flow. Second operand 5 states and 99 transitions. [2024-11-28 03:06:35,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 97 transitions, 965 flow [2024-11-28 03:06:35,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 97 transitions, 935 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-11-28 03:06:35,537 INFO L231 Difference]: Finished difference. Result has 101 places, 80 transitions, 689 flow [2024-11-28 03:06:35,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=689, PETRI_PLACES=101, PETRI_TRANSITIONS=80} [2024-11-28 03:06:35,538 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-11-28 03:06:35,538 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 80 transitions, 689 flow [2024-11-28 03:06:35,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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) [2024-11-28 03:06:35,538 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:35,539 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:35,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-28 03:06:35,539 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:35,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:35,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1389293059, now seen corresponding path program 1 times [2024-11-28 03:06:35,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:35,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727177531] [2024-11-28 03:06:35,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:35,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:36,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:36,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727177531] [2024-11-28 03:06:36,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727177531] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:36,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449132316] [2024-11-28 03:06:36,550 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:06:36,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:36,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:36,552 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:36,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:06:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:06:36,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-28 03:06:36,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:36,833 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 [2024-11-28 03:06:37,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:06:37,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2024-11-28 03:06:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:37,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:38,371 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 57 treesize of output 51 [2024-11-28 03:06:38,394 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:06:38,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 97 [2024-11-28 03:06:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:38,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449132316] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:38,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:38,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2024-11-28 03:06:38,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680005444] [2024-11-28 03:06:38,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:38,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 03:06:38,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:38,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 03:06:38,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1311, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 03:06:39,333 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-11-28 03:06:39,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 80 transitions, 689 flow. Second operand has 39 states, 39 states have (on average 9.564102564102564) internal successors, (373), 39 states have internal predecessors, (373), 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) [2024-11-28 03:06:39,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:39,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-11-28 03:06:39,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:06:55,838 INFO L124 PetriNetUnfolderBase]: 7054/13284 cut-off events. [2024-11-28 03:06:55,838 INFO L125 PetriNetUnfolderBase]: For 62198/62318 co-relation queries the response was YES. [2024-11-28 03:06:55,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54777 conditions, 13284 events. 7054/13284 cut-off events. For 62198/62318 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 101709 event pairs, 568 based on Foata normal form. 506/13789 useless extension candidates. Maximal degree in co-relation 54742. Up to 2587 conditions per place. [2024-11-28 03:06:55,952 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 897 selfloop transitions, 216 changer transitions 29/1147 dead transitions. [2024-11-28 03:06:55,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 1147 transitions, 9470 flow [2024-11-28 03:06:55,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-28 03:06:55,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-11-28 03:06:55,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 1228 transitions. [2024-11-28 03:06:55,956 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37212121212121213 [2024-11-28 03:06:55,956 INFO L175 Difference]: Start difference. First operand has 101 places, 80 transitions, 689 flow. Second operand 75 states and 1228 transitions. [2024-11-28 03:06:55,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 1147 transitions, 9470 flow [2024-11-28 03:06:56,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 1147 transitions, 9374 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-11-28 03:06:56,061 INFO L231 Difference]: Finished difference. Result has 204 places, 319 transitions, 4286 flow [2024-11-28 03:06:56,061 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=4286, PETRI_PLACES=204, PETRI_TRANSITIONS=319} [2024-11-28 03:06:56,062 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-11-28 03:06:56,062 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 319 transitions, 4286 flow [2024-11-28 03:06:56,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 9.564102564102564) internal successors, (373), 39 states have internal predecessors, (373), 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) [2024-11-28 03:06:56,062 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:06:56,062 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:06:56,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:06:56,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:56,266 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:06:56,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:06:56,266 INFO L85 PathProgramCache]: Analyzing trace with hash -376810509, now seen corresponding path program 2 times [2024-11-28 03:06:56,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:06:56,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027914055] [2024-11-28 03:06:56,267 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:06:56,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:06:56,285 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:06:56,285 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:57,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:06:57,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027914055] [2024-11-28 03:06:57,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027914055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:06:57,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674434637] [2024-11-28 03:06:57,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:06:57,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:06:57,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:06:57,023 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:06:57,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:06:57,109 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:06:57,109 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:06:57,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 03:06:57,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:06:57,228 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 [2024-11-28 03:06:58,053 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-28 03:06:58,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2024-11-28 03:06:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:58,087 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:06:58,912 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 75 treesize of output 67 [2024-11-28 03:06:58,931 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:06:58,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 112 [2024-11-28 03:06:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:06:59,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674434637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:06:59,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:06:59,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2024-11-28 03:06:59,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216301033] [2024-11-28 03:06:59,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:06:59,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 03:06:59,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:06:59,521 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 03:06:59,521 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1429, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 03:06:59,764 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 44 [2024-11-28 03:06:59,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 319 transitions, 4286 flow. Second operand has 41 states, 41 states have (on average 8.536585365853659) internal successors, (350), 41 states have internal predecessors, (350), 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) [2024-11-28 03:06:59,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:06:59,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 44 [2024-11-28 03:06:59,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:07:17,781 INFO L124 PetriNetUnfolderBase]: 18474/33524 cut-off events. [2024-11-28 03:07:17,781 INFO L125 PetriNetUnfolderBase]: For 460116/460570 co-relation queries the response was YES. [2024-11-28 03:07:18,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161888 conditions, 33524 events. 18474/33524 cut-off events. For 460116/460570 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 276665 event pairs, 1443 based on Foata normal form. 1184/34707 useless extension candidates. Maximal degree in co-relation 161820. Up to 5894 conditions per place. [2024-11-28 03:07:18,227 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 1176 selfloop transitions, 568 changer transitions 51/1799 dead transitions. [2024-11-28 03:07:18,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 1799 transitions, 21590 flow [2024-11-28 03:07:18,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-11-28 03:07:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2024-11-28 03:07:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 1258 transitions. [2024-11-28 03:07:18,232 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34446878422782035 [2024-11-28 03:07:18,233 INFO L175 Difference]: Start difference. First operand has 204 places, 319 transitions, 4286 flow. Second operand 83 states and 1258 transitions. [2024-11-28 03:07:18,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 1799 transitions, 21590 flow [2024-11-28 03:07:22,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1799 transitions, 17977 flow, removed 1684 selfloop flow, removed 11 redundant places. [2024-11-28 03:07:22,295 INFO L231 Difference]: Finished difference. Result has 320 places, 827 transitions, 11323 flow [2024-11-28 03:07:22,295 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3048, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=11323, PETRI_PLACES=320, PETRI_TRANSITIONS=827} [2024-11-28 03:07:22,296 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-11-28 03:07:22,296 INFO L471 AbstractCegarLoop]: Abstraction has has 320 places, 827 transitions, 11323 flow [2024-11-28 03:07:22,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 8.536585365853659) internal successors, (350), 41 states have internal predecessors, (350), 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) [2024-11-28 03:07:22,296 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:07:22,296 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] [2024-11-28 03:07:22,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:07:22,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 03:07:22,497 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:07:22,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:07:22,497 INFO L85 PathProgramCache]: Analyzing trace with hash -683356549, now seen corresponding path program 1 times [2024-11-28 03:07:22,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:07:22,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028807998] [2024-11-28 03:07:22,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:07:22,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:07:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:07:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:07:23,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:07:23,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028807998] [2024-11-28 03:07:23,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028807998] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:07:23,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749579915] [2024-11-28 03:07:23,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:07:23,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:07:23,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:07:23,626 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:07:23,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:07:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:07:23,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 03:07:23,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:07:24,395 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:07:24,397 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:07:24,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 13 [2024-11-28 03:07:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:07:24,437 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:07:24,937 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-28 03:07:24,937 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 47 treesize of output 42 [2024-11-28 03:07:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:07:25,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749579915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:07:25,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:07:25,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2024-11-28 03:07:25,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561844119] [2024-11-28 03:07:25,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:07:25,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 03:07:25,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:07:25,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 03:07:25,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 03:07:25,836 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 03:07:25,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 827 transitions, 11323 flow. Second operand has 39 states, 39 states have (on average 10.487179487179487) internal successors, (409), 39 states have internal predecessors, (409), 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) [2024-11-28 03:07:25,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:07:25,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 03:07:25,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:07:47,011 INFO L124 PetriNetUnfolderBase]: 21734/45095 cut-off events. [2024-11-28 03:07:47,011 INFO L125 PetriNetUnfolderBase]: For 977304/978380 co-relation queries the response was YES. [2024-11-28 03:07:47,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258819 conditions, 45095 events. 21734/45095 cut-off events. For 977304/978380 co-relation queries the response was YES. Maximal size of possible extension queue 1106. Compared 437537 event pairs, 768 based on Foata normal form. 1083/46093 useless extension candidates. Maximal degree in co-relation 258706. Up to 7215 conditions per place. [2024-11-28 03:07:48,147 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 953 selfloop transitions, 1328 changer transitions 28/2388 dead transitions. [2024-11-28 03:07:48,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 2388 transitions, 34444 flow [2024-11-28 03:07:48,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-28 03:07:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2024-11-28 03:07:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 1027 transitions. [2024-11-28 03:07:48,151 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38901515151515154 [2024-11-28 03:07:48,151 INFO L175 Difference]: Start difference. First operand has 320 places, 827 transitions, 11323 flow. Second operand 60 states and 1027 transitions. [2024-11-28 03:07:48,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 2388 transitions, 34444 flow [2024-11-28 03:08:01,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 2388 transitions, 31735 flow, removed 1318 selfloop flow, removed 15 redundant places. [2024-11-28 03:08:01,164 INFO L231 Difference]: Finished difference. Result has 388 places, 1722 transitions, 28591 flow [2024-11-28 03:08:01,164 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10127, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=28591, PETRI_PLACES=388, PETRI_TRANSITIONS=1722} [2024-11-28 03:08:01,165 INFO L279 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-11-28 03:08:01,165 INFO L471 AbstractCegarLoop]: Abstraction has has 388 places, 1722 transitions, 28591 flow [2024-11-28 03:08:01,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 10.487179487179487) internal successors, (409), 39 states have internal predecessors, (409), 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) [2024-11-28 03:08:01,165 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:08:01,165 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] [2024-11-28 03:08:01,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 03:08:01,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 03:08:01,366 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2024-11-28 03:08:01,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:08:01,366 INFO L85 PathProgramCache]: Analyzing trace with hash -354389657, now seen corresponding path program 2 times [2024-11-28 03:08:01,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:08:01,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457061114] [2024-11-28 03:08:01,367 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:08:01,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:08:01,393 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:08:01,393 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:08:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:08:02,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:08:02,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457061114] [2024-11-28 03:08:02,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457061114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:08:02,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105641454] [2024-11-28 03:08:02,200 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:08:02,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:08:02,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:08:02,202 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:08:02,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4d8ab08-4f11-4eab-8ac9-a77f2b2f7403/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:08:02,296 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:08:02,296 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:08:02,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 03:08:02,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:08:02,390 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 [2024-11-28 03:08:02,903 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-28 03:08:02,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2024-11-28 03:08:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:08:02,934 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:08:03,920 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 75 treesize of output 67 [2024-11-28 03:08:03,978 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-28 03:08:03,978 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 130 treesize of output 128 [2024-11-28 03:08:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:08:04,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105641454] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:08:04,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:08:04,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2024-11-28 03:08:04,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075839718] [2024-11-28 03:08:04,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:08:04,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 03:08:04,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:08:04,889 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 03:08:04,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 03:08:05,413 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-11-28 03:08:05,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1722 transitions, 28591 flow. Second operand has 39 states, 39 states have (on average 10.487179487179487) internal successors, (409), 39 states have internal predecessors, (409), 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) [2024-11-28 03:08:05,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:08:05,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-11-28 03:08:05,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:08:39,616 INFO L124 PetriNetUnfolderBase]: 22136/45693 cut-off events. [2024-11-28 03:08:39,616 INFO L125 PetriNetUnfolderBase]: For 1313950/1315117 co-relation queries the response was YES. [2024-11-28 03:08:40,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302072 conditions, 45693 events. 22136/45693 cut-off events. For 1313950/1315117 co-relation queries the response was YES. Maximal size of possible extension queue 1146. Compared 443376 event pairs, 4875 based on Foata normal form. 322/45917 useless extension candidates. Maximal degree in co-relation 301933. Up to 27087 conditions per place. [2024-11-28 03:08:41,178 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 1929 selfloop transitions, 198 changer transitions 26/2232 dead transitions. [2024-11-28 03:08:41,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 2232 transitions, 36830 flow [2024-11-28 03:08:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-28 03:08:41,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-11-28 03:08:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 962 transitions. [2024-11-28 03:08:41,182 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34704184704184704 [2024-11-28 03:08:41,182 INFO L175 Difference]: Start difference. First operand has 388 places, 1722 transitions, 28591 flow. Second operand 63 states and 962 transitions. [2024-11-28 03:08:41,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 2232 transitions, 36830 flow