./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:50:38,778 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:50:38,846 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 03:50:38,852 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:50:38,853 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:50:38,878 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:50:38,879 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:50:38,879 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:50:38,880 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:50:38,880 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:50:38,881 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:50:38,882 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:50:38,882 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:50:38,883 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:50:38,883 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:50:38,884 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:50:38,884 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 03:50:38,885 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:50:38,885 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:50:38,886 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:50:38,887 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:50:38,888 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 03:50:38,888 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:50:38,889 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 03:50:38,889 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 03:50:38,889 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 03:50:38,890 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:50:38,890 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 03:50:38,891 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:50:38,891 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:50:38,892 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:50:38,892 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:50:38,892 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:50:38,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:50:38,893 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:50:38,893 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:50:38,893 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 03:50:38,894 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:50:38,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:50:38,894 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:50:38,894 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:50:38,895 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 03:50:38,895 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:50:38,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:50:38,895 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2023-11-29 03:50:39,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:50:39,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:50:39,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:50:39,144 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:50:39,145 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:50:39,146 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-29 03:50:41,980 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:50:42,153 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:50:42,153 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2023-11-29 03:50:42,159 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/data/1b9f369ed/0cb40feb3e134e98a1d8779fbf1113a0/FLAG6fa6294fe [2023-11-29 03:50:42,171 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/data/1b9f369ed/0cb40feb3e134e98a1d8779fbf1113a0 [2023-11-29 03:50:42,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:50:42,174 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:50:42,175 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:50:42,175 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:50:42,179 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:50:42,180 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:50:42" (1/1) ... [2023-11-29 03:50:42,180 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@274e5a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:50:42, skipping insertion in model container [2023-11-29 03:50:42,181 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:50:42" (1/1) ... [2023-11-29 03:50:42,205 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:50:42,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:50:42,375 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:50:42,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:50:42,407 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:50:42,407 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 03:50:42,413 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:50:42,414 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:50:42 WrapperNode [2023-11-29 03:50:42,414 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:50:42,414 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:50:42,415 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:50:42,415 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:50:42,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:50:42" (1/1) ... [2023-11-29 03:50:42,427 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:50:42" (1/1) ... [2023-11-29 03:50:42,448 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 169 [2023-11-29 03:50:42,449 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:50:42,449 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:50:42,449 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:50:42,449 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:50:42,458 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:50:42" (1/1) ... [2023-11-29 03:50:42,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:50:42" (1/1) ... [2023-11-29 03:50:42,461 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:50:42" (1/1) ... [2023-11-29 03:50:42,473 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 2, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-29 03:50:42,473 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:50:42" (1/1) ... [2023-11-29 03:50:42,473 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:50:42" (1/1) ... [2023-11-29 03:50:42,482 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:50:42" (1/1) ... [2023-11-29 03:50:42,486 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:50:42" (1/1) ... [2023-11-29 03:50:42,487 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:50:42" (1/1) ... [2023-11-29 03:50:42,488 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:50:42" (1/1) ... [2023-11-29 03:50:42,491 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:50:42,491 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:50:42,491 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:50:42,492 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:50:42,492 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:50:42" (1/1) ... [2023-11-29 03:50:42,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:50:42,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:42,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:50:42,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:50:42,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:50:42,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 03:50:42,556 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 03:50:42,556 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 03:50:42,556 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 03:50:42,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 03:50:42,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 03:50:42,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 03:50:42,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 03:50:42,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 03:50:42,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 03:50:42,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 03:50:42,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 03:50:42,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 03:50:42,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 03:50:42,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 03:50:42,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 03:50:42,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:50:42,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:50:42,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 03:50:42,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 03:50:42,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 03:50:42,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 03:50:42,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 03:50:42,561 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 03:50:42,681 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:50:42,683 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:50:42,940 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:50:43,162 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:50:43,162 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 03:50:43,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:50:43 BoogieIcfgContainer [2023-11-29 03:50:43,163 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:50:43,166 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:50:43,166 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:50:43,170 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:50:43,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:50:42" (1/3) ... [2023-11-29 03:50:43,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f064b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:50:43, skipping insertion in model container [2023-11-29 03:50:43,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:50:42" (2/3) ... [2023-11-29 03:50:43,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f064b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:50:43, skipping insertion in model container [2023-11-29 03:50:43,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:50:43" (3/3) ... [2023-11-29 03:50:43,173 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-11-29 03:50:43,183 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 03:50:43,194 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:50:43,194 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-29 03:50:43,194 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 03:50:43,247 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 03:50:43,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 48 transitions, 110 flow [2023-11-29 03:50:43,315 INFO L124 PetriNetUnfolderBase]: 5/46 cut-off events. [2023-11-29 03:50:43,316 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 03:50:43,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 5/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 110 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2023-11-29 03:50:43,319 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 48 transitions, 110 flow [2023-11-29 03:50:43,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 44 transitions, 97 flow [2023-11-29 03:50:43,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:50:43,343 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@15689ddb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:50:43,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-29 03:50:43,347 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 03:50:43,348 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-29 03:50:43,348 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 03:50:43,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:43,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 03:50:43,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:43,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:43,355 INFO L85 PathProgramCache]: Analyzing trace with hash 479404, now seen corresponding path program 1 times [2023-11-29 03:50:43,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:43,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345071665] [2023-11-29 03:50:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:43,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:43,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:43,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345071665] [2023-11-29 03:50:43,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345071665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:50:43,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:50:43,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:50:43,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833759436] [2023-11-29 03:50:43,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:50:43,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:50:43,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:43,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:50:43,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:50:43,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-29 03:50:43,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 97 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:43,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:43,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-29 03:50:43,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:43,870 INFO L124 PetriNetUnfolderBase]: 219/427 cut-off events. [2023-11-29 03:50:43,871 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-29 03:50:43,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 835 conditions, 427 events. 219/427 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2264 event pairs, 192 based on Foata normal form. 13/326 useless extension candidates. Maximal degree in co-relation 688. Up to 378 conditions per place. [2023-11-29 03:50:43,879 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 28 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-11-29 03:50:43,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 165 flow [2023-11-29 03:50:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:50:43,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:50:43,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2023-11-29 03:50:43,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2023-11-29 03:50:43,890 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 99 transitions. [2023-11-29 03:50:43,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 99 transitions. [2023-11-29 03:50:43,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:43,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 99 transitions. [2023-11-29 03:50:43,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:43,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:43,900 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:43,901 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 97 flow. Second operand 4 states and 99 transitions. [2023-11-29 03:50:43,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 165 flow [2023-11-29 03:50:43,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 03:50:43,908 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 119 flow [2023-11-29 03:50:43,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-11-29 03:50:43,913 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-11-29 03:50:43,913 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 119 flow [2023-11-29 03:50:43,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:43,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:43,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-29 03:50:43,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 03:50:43,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:43,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:43,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1397499197, now seen corresponding path program 1 times [2023-11-29 03:50:43,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:43,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339437954] [2023-11-29 03:50:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:43,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:44,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:44,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339437954] [2023-11-29 03:50:44,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339437954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:50:44,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756769609] [2023-11-29 03:50:44,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:44,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:44,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:44,061 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:44,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:50:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:44,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:50:44,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:44,209 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:50:44,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756769609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:50:44,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:50:44,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-29 03:50:44,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79333233] [2023-11-29 03:50:44,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:50:44,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 03:50:44,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:44,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 03:50:44,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 03:50:44,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-29 03:50:44,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:44,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:44,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-29 03:50:44,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:44,372 INFO L124 PetriNetUnfolderBase]: 219/426 cut-off events. [2023-11-29 03:50:44,372 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-29 03:50:44,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 426 events. 219/426 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2247 event pairs, 192 based on Foata normal form. 1/314 useless extension candidates. Maximal degree in co-relation 804. Up to 373 conditions per place. [2023-11-29 03:50:44,378 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 24 selfloop transitions, 7 changer transitions 0/45 dead transitions. [2023-11-29 03:50:44,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 177 flow [2023-11-29 03:50:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:50:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:50:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2023-11-29 03:50:44,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-29 03:50:44,382 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 128 transitions. [2023-11-29 03:50:44,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 128 transitions. [2023-11-29 03:50:44,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:44,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 128 transitions. [2023-11-29 03:50:44,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:44,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:44,386 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:44,386 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 119 flow. Second operand 6 states and 128 transitions. [2023-11-29 03:50:44,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 177 flow [2023-11-29 03:50:44,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:50:44,389 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 126 flow [2023-11-29 03:50:44,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-29 03:50:44,390 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2023-11-29 03:50:44,390 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 126 flow [2023-11-29 03:50:44,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:44,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:44,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-29 03:50:44,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:50:44,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:44,595 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:44,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:44,596 INFO L85 PathProgramCache]: Analyzing trace with hash 372802627, now seen corresponding path program 1 times [2023-11-29 03:50:44,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:44,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372609560] [2023-11-29 03:50:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:44,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:44,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:44,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372609560] [2023-11-29 03:50:44,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372609560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:50:44,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904849949] [2023-11-29 03:50:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:44,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:44,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:44,696 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:44,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:50:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:44,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 03:50:44,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:44,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:44,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:50:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:44,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904849949] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:50:44,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:50:44,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 03:50:44,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762328226] [2023-11-29 03:50:44,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:50:44,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 03:50:44,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:44,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 03:50:44,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:50:44,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-29 03:50:44,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 126 flow. Second operand has 12 states, 12 states have (on average 17.083333333333332) internal successors, (205), 12 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:44,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:44,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-29 03:50:44,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:45,079 INFO L124 PetriNetUnfolderBase]: 222/438 cut-off events. [2023-11-29 03:50:45,080 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-11-29 03:50:45,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 438 events. 222/438 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2354 event pairs, 192 based on Foata normal form. 3/326 useless extension candidates. Maximal degree in co-relation 805. Up to 380 conditions per place. [2023-11-29 03:50:45,084 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 27 selfloop transitions, 13 changer transitions 0/54 dead transitions. [2023-11-29 03:50:45,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 260 flow [2023-11-29 03:50:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 03:50:45,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 03:50:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2023-11-29 03:50:45,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42291666666666666 [2023-11-29 03:50:45,088 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 203 transitions. [2023-11-29 03:50:45,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 203 transitions. [2023-11-29 03:50:45,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:45,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 203 transitions. [2023-11-29 03:50:45,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 20.3) internal successors, (203), 10 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:45,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 48.0) internal successors, (528), 11 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:45,092 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 48.0) internal successors, (528), 11 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:45,092 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 126 flow. Second operand 10 states and 203 transitions. [2023-11-29 03:50:45,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 260 flow [2023-11-29 03:50:45,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 214 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-29 03:50:45,096 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 178 flow [2023-11-29 03:50:45,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=178, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2023-11-29 03:50:45,097 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2023-11-29 03:50:45,097 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 178 flow [2023-11-29 03:50:45,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.083333333333332) internal successors, (205), 12 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:45,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:45,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:45,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:50:45,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:45,299 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:45,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:45,299 INFO L85 PathProgramCache]: Analyzing trace with hash 438715959, now seen corresponding path program 1 times [2023-11-29 03:50:45,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:45,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748745076] [2023-11-29 03:50:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:45,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:45,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:45,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748745076] [2023-11-29 03:50:45,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748745076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:50:45,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:50:45,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:50:45,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366993228] [2023-11-29 03:50:45,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:50:45,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:50:45,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:45,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:50:45,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:50:45,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-29 03:50:45,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 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) [2023-11-29 03:50:45,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:45,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-29 03:50:45,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:45,496 INFO L124 PetriNetUnfolderBase]: 261/525 cut-off events. [2023-11-29 03:50:45,496 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-29 03:50:45,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 525 events. 261/525 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2782 event pairs, 153 based on Foata normal form. 28/408 useless extension candidates. Maximal degree in co-relation 999. Up to 318 conditions per place. [2023-11-29 03:50:45,501 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 54 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-11-29 03:50:45,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 322 flow [2023-11-29 03:50:45,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:50:45,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:50:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2023-11-29 03:50:45,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2023-11-29 03:50:45,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 93 transitions. [2023-11-29 03:50:45,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 93 transitions. [2023-11-29 03:50:45,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:45,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 93 transitions. [2023-11-29 03:50:45,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:45,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:45,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:45,505 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 178 flow. Second operand 3 states and 93 transitions. [2023-11-29 03:50:45,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 322 flow [2023-11-29 03:50:45,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 311 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 03:50:45,509 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 169 flow [2023-11-29 03:50:45,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-11-29 03:50:45,510 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2023-11-29 03:50:45,510 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 169 flow [2023-11-29 03:50:45,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 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) [2023-11-29 03:50:45,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:45,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:45,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 03:50:45,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:45,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:45,512 INFO L85 PathProgramCache]: Analyzing trace with hash 715293339, now seen corresponding path program 1 times [2023-11-29 03:50:45,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:45,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591719200] [2023-11-29 03:50:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:45,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:45,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:45,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591719200] [2023-11-29 03:50:45,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591719200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:50:45,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:50:45,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:50:45,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118353960] [2023-11-29 03:50:45,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:50:45,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:50:45,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:45,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:50:45,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:50:45,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2023-11-29 03:50:45,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:45,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:45,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2023-11-29 03:50:45,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:45,725 INFO L124 PetriNetUnfolderBase]: 248/502 cut-off events. [2023-11-29 03:50:45,725 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2023-11-29 03:50:45,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 502 events. 248/502 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2753 event pairs, 219 based on Foata normal form. 16/430 useless extension candidates. Maximal degree in co-relation 1023. Up to 384 conditions per place. [2023-11-29 03:50:45,730 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 36 selfloop transitions, 2 changer transitions 12/64 dead transitions. [2023-11-29 03:50:45,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 295 flow [2023-11-29 03:50:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:50:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:50:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2023-11-29 03:50:45,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2023-11-29 03:50:45,731 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 115 transitions. [2023-11-29 03:50:45,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 115 transitions. [2023-11-29 03:50:45,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:45,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 115 transitions. [2023-11-29 03:50:45,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:45,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:45,734 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:45,734 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 169 flow. Second operand 4 states and 115 transitions. [2023-11-29 03:50:45,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 295 flow [2023-11-29 03:50:45,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 64 transitions, 291 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:50:45,737 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 170 flow [2023-11-29 03:50:45,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2023-11-29 03:50:45,738 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 13 predicate places. [2023-11-29 03:50:45,739 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 170 flow [2023-11-29 03:50:45,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:45,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:45,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:45,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 03:50:45,739 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:45,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:45,740 INFO L85 PathProgramCache]: Analyzing trace with hash -55517014, now seen corresponding path program 1 times [2023-11-29 03:50:45,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:45,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470105874] [2023-11-29 03:50:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:45,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:45,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:45,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470105874] [2023-11-29 03:50:45,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470105874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:50:45,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445454199] [2023-11-29 03:50:45,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:45,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:45,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:45,883 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:45,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 03:50:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:45,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 03:50:45,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:50:46,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:50:46,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445454199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:50:46,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:50:46,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-11-29 03:50:46,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459653419] [2023-11-29 03:50:46,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:50:46,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:50:46,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:46,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:50:46,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-29 03:50:46,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-29 03:50:46,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:46,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:46,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-29 03:50:46,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:46,147 INFO L124 PetriNetUnfolderBase]: 219/455 cut-off events. [2023-11-29 03:50:46,147 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2023-11-29 03:50:46,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 455 events. 219/455 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2310 event pairs, 153 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 908. Up to 316 conditions per place. [2023-11-29 03:50:46,151 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 51 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-11-29 03:50:46,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 67 transitions, 312 flow [2023-11-29 03:50:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:50:46,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:50:46,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2023-11-29 03:50:46,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-11-29 03:50:46,152 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 108 transitions. [2023-11-29 03:50:46,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 108 transitions. [2023-11-29 03:50:46,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:46,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 108 transitions. [2023-11-29 03:50:46,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:46,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:46,154 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:46,154 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 170 flow. Second operand 4 states and 108 transitions. [2023-11-29 03:50:46,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 67 transitions, 312 flow [2023-11-29 03:50:46,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:50:46,158 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 170 flow [2023-11-29 03:50:46,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2023-11-29 03:50:46,159 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2023-11-29 03:50:46,159 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 170 flow [2023-11-29 03:50:46,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:46,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:46,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:46,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 03:50:46,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 03:50:46,363 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:46,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:46,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1721026934, now seen corresponding path program 1 times [2023-11-29 03:50:46,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:46,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982640125] [2023-11-29 03:50:46,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:46,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:50:46,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:46,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982640125] [2023-11-29 03:50:46,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982640125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:50:46,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:50:46,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:50:46,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814021827] [2023-11-29 03:50:46,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:50:46,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:50:46,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:46,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:50:46,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:50:46,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-29 03:50:46,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:46,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:46,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-29 03:50:46,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:46,741 INFO L124 PetriNetUnfolderBase]: 431/852 cut-off events. [2023-11-29 03:50:46,741 INFO L125 PetriNetUnfolderBase]: For 218/218 co-relation queries the response was YES. [2023-11-29 03:50:46,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 852 events. 431/852 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4370 event pairs, 131 based on Foata normal form. 48/725 useless extension candidates. Maximal degree in co-relation 1725. Up to 393 conditions per place. [2023-11-29 03:50:46,747 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 77 selfloop transitions, 6 changer transitions 6/100 dead transitions. [2023-11-29 03:50:46,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 100 transitions, 456 flow [2023-11-29 03:50:46,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:50:46,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 03:50:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2023-11-29 03:50:46,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-29 03:50:46,749 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 160 transitions. [2023-11-29 03:50:46,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 160 transitions. [2023-11-29 03:50:46,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:46,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 160 transitions. [2023-11-29 03:50:46,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:46,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:46,751 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:46,751 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 170 flow. Second operand 5 states and 160 transitions. [2023-11-29 03:50:46,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 100 transitions, 456 flow [2023-11-29 03:50:46,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 450 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 03:50:46,755 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 209 flow [2023-11-29 03:50:46,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=209, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2023-11-29 03:50:46,756 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 16 predicate places. [2023-11-29 03:50:46,756 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 209 flow [2023-11-29 03:50:46,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:46,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:46,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:46,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 03:50:46,757 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:46,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:46,757 INFO L85 PathProgramCache]: Analyzing trace with hash -899292797, now seen corresponding path program 1 times [2023-11-29 03:50:46,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:46,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153629093] [2023-11-29 03:50:46,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:46,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:50:46,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:46,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153629093] [2023-11-29 03:50:46,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153629093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:50:46,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:50:46,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 03:50:46,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902224316] [2023-11-29 03:50:46,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:50:46,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:50:46,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:46,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:50:46,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:50:46,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2023-11-29 03:50:46,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 209 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:46,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:46,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2023-11-29 03:50:46,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:46,948 INFO L124 PetriNetUnfolderBase]: 322/703 cut-off events. [2023-11-29 03:50:46,948 INFO L125 PetriNetUnfolderBase]: For 372/395 co-relation queries the response was YES. [2023-11-29 03:50:46,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1547 conditions, 703 events. 322/703 cut-off events. For 372/395 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3691 event pairs, 236 based on Foata normal form. 23/657 useless extension candidates. Maximal degree in co-relation 1515. Up to 557 conditions per place. [2023-11-29 03:50:46,954 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 39 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-11-29 03:50:46,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 285 flow [2023-11-29 03:50:46,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:50:46,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:50:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2023-11-29 03:50:46,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-11-29 03:50:46,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 81 transitions. [2023-11-29 03:50:46,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 81 transitions. [2023-11-29 03:50:46,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:46,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 81 transitions. [2023-11-29 03:50:46,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:46,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:46,956 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:46,957 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 209 flow. Second operand 3 states and 81 transitions. [2023-11-29 03:50:46,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 285 flow [2023-11-29 03:50:46,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 54 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:50:46,960 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 204 flow [2023-11-29 03:50:46,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2023-11-29 03:50:46,961 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2023-11-29 03:50:46,961 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 204 flow [2023-11-29 03:50:46,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:46,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:46,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:46,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 03:50:46,961 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:46,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:46,962 INFO L85 PathProgramCache]: Analyzing trace with hash -899292796, now seen corresponding path program 1 times [2023-11-29 03:50:46,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:46,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673291393] [2023-11-29 03:50:46,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:46,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:47,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:47,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673291393] [2023-11-29 03:50:47,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673291393] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:50:47,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715476655] [2023-11-29 03:50:47,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:47,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:47,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:47,111 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:47,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 03:50:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:47,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 03:50:47,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:50:47,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:50:47,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715476655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:50:47,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:50:47,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2023-11-29 03:50:47,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117902323] [2023-11-29 03:50:47,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:50:47,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:50:47,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:47,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:50:47,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 03:50:47,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2023-11-29 03:50:47,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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) [2023-11-29 03:50:47,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:47,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2023-11-29 03:50:47,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:47,398 INFO L124 PetriNetUnfolderBase]: 260/559 cut-off events. [2023-11-29 03:50:47,398 INFO L125 PetriNetUnfolderBase]: For 280/303 co-relation queries the response was YES. [2023-11-29 03:50:47,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 559 events. 260/559 cut-off events. For 280/303 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2800 event pairs, 101 based on Foata normal form. 67/560 useless extension candidates. Maximal degree in co-relation 1250. Up to 282 conditions per place. [2023-11-29 03:50:47,402 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 31 selfloop transitions, 6 changer transitions 8/59 dead transitions. [2023-11-29 03:50:47,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 59 transitions, 311 flow [2023-11-29 03:50:47,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:50:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:50:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2023-11-29 03:50:47,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2023-11-29 03:50:47,403 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 104 transitions. [2023-11-29 03:50:47,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 104 transitions. [2023-11-29 03:50:47,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:47,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 104 transitions. [2023-11-29 03:50:47,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:47,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:47,405 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:47,405 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 204 flow. Second operand 4 states and 104 transitions. [2023-11-29 03:50:47,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 59 transitions, 311 flow [2023-11-29 03:50:47,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:50:47,408 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 192 flow [2023-11-29 03:50:47,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2023-11-29 03:50:47,409 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2023-11-29 03:50:47,409 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 192 flow [2023-11-29 03:50:47,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 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) [2023-11-29 03:50:47,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:47,409 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-29 03:50:47,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 03:50:47,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:47,615 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:47,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:47,616 INFO L85 PathProgramCache]: Analyzing trace with hash 716362228, now seen corresponding path program 2 times [2023-11-29 03:50:47,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:47,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910177926] [2023-11-29 03:50:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:47,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:47,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:47,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910177926] [2023-11-29 03:50:47,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910177926] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:50:47,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701379010] [2023-11-29 03:50:47,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:50:47,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:47,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:47,764 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:47,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 03:50:47,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 03:50:47,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:50:47,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:50:47,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 03:50:47,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:50:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 03:50:47,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701379010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:50:47,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:50:47,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-29 03:50:47,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885447747] [2023-11-29 03:50:47,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:50:47,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 03:50:47,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:47,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 03:50:47,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 03:50:47,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-29 03:50:47,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 192 flow. Second operand has 14 states, 14 states have (on average 17.142857142857142) internal successors, (240), 14 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:47,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:47,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-29 03:50:47,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:48,175 INFO L124 PetriNetUnfolderBase]: 112/290 cut-off events. [2023-11-29 03:50:48,176 INFO L125 PetriNetUnfolderBase]: For 335/354 co-relation queries the response was YES. [2023-11-29 03:50:48,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703 conditions, 290 events. 112/290 cut-off events. For 335/354 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1180 event pairs, 71 based on Foata normal form. 21/276 useless extension candidates. Maximal degree in co-relation 686. Up to 185 conditions per place. [2023-11-29 03:50:48,178 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 18 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2023-11-29 03:50:48,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 49 transitions, 270 flow [2023-11-29 03:50:48,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 03:50:48,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 03:50:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 260 transitions. [2023-11-29 03:50:48,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2023-11-29 03:50:48,180 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 260 transitions. [2023-11-29 03:50:48,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 260 transitions. [2023-11-29 03:50:48,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:48,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 260 transitions. [2023-11-29 03:50:48,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:48,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 48.0) internal successors, (720), 15 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:48,183 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 48.0) internal successors, (720), 15 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:48,183 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 192 flow. Second operand 14 states and 260 transitions. [2023-11-29 03:50:48,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 49 transitions, 270 flow [2023-11-29 03:50:48,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 49 transitions, 244 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-11-29 03:50:48,185 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 208 flow [2023-11-29 03:50:48,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=208, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2023-11-29 03:50:48,186 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2023-11-29 03:50:48,186 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 208 flow [2023-11-29 03:50:48,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.142857142857142) internal successors, (240), 14 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:48,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:48,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:48,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 03:50:48,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:48,387 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:48,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:48,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1387793782, now seen corresponding path program 1 times [2023-11-29 03:50:48,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:48,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283820951] [2023-11-29 03:50:48,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:48,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:50:48,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:48,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283820951] [2023-11-29 03:50:48,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283820951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:50:48,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:50:48,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 03:50:48,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163495744] [2023-11-29 03:50:48,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:50:48,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:50:48,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:48,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:50:48,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:50:48,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2023-11-29 03:50:48,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:48,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:48,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2023-11-29 03:50:48,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:48,529 INFO L124 PetriNetUnfolderBase]: 145/325 cut-off events. [2023-11-29 03:50:48,529 INFO L125 PetriNetUnfolderBase]: For 185/204 co-relation queries the response was YES. [2023-11-29 03:50:48,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 325 events. 145/325 cut-off events. For 185/204 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1329 event pairs, 86 based on Foata normal form. 17/304 useless extension candidates. Maximal degree in co-relation 745. Up to 221 conditions per place. [2023-11-29 03:50:48,532 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 43 selfloop transitions, 2 changer transitions 2/58 dead transitions. [2023-11-29 03:50:48,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 324 flow [2023-11-29 03:50:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:50:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:50:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2023-11-29 03:50:48,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2023-11-29 03:50:48,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 82 transitions. [2023-11-29 03:50:48,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 82 transitions. [2023-11-29 03:50:48,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:48,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 82 transitions. [2023-11-29 03:50:48,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:48,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:48,535 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:48,535 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 208 flow. Second operand 3 states and 82 transitions. [2023-11-29 03:50:48,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 324 flow [2023-11-29 03:50:48,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 58 transitions, 256 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-11-29 03:50:48,538 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 148 flow [2023-11-29 03:50:48,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-11-29 03:50:48,538 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 6 predicate places. [2023-11-29 03:50:48,539 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 148 flow [2023-11-29 03:50:48,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:48,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:48,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:48,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 03:50:48,539 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:48,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:48,540 INFO L85 PathProgramCache]: Analyzing trace with hash 309306599, now seen corresponding path program 1 times [2023-11-29 03:50:48,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:48,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2638983] [2023-11-29 03:50:48,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:48,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:49,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:49,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2638983] [2023-11-29 03:50:49,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2638983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:50:49,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133461629] [2023-11-29 03:50:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:49,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:49,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:49,087 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:49,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 03:50:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:49,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 03:50:49,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:49,290 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 [2023-11-29 03:50:49,800 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 17 treesize of output 9 [2023-11-29 03:50:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:49,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:50:50,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2023-11-29 03:50:50,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-11-29 03:50:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:50,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133461629] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:50:50,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:50:50,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 20 [2023-11-29 03:50:50,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297930659] [2023-11-29 03:50:50,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:50:50,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 03:50:50,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:50,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 03:50:50,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-11-29 03:50:50,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2023-11-29 03:50:50,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 148 flow. Second operand has 22 states, 22 states have (on average 15.045454545454545) internal successors, (331), 22 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:50,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:50,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2023-11-29 03:50:50,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:51,971 INFO L124 PetriNetUnfolderBase]: 534/1067 cut-off events. [2023-11-29 03:50:51,971 INFO L125 PetriNetUnfolderBase]: For 463/510 co-relation queries the response was YES. [2023-11-29 03:50:51,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2432 conditions, 1067 events. 534/1067 cut-off events. For 463/510 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5628 event pairs, 78 based on Foata normal form. 47/967 useless extension candidates. Maximal degree in co-relation 2421. Up to 223 conditions per place. [2023-11-29 03:50:51,980 INFO L140 encePairwiseOnDemand]: 36/48 looper letters, 87 selfloop transitions, 31 changer transitions 4/133 dead transitions. [2023-11-29 03:50:51,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 133 transitions, 646 flow [2023-11-29 03:50:51,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 03:50:51,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 03:50:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 324 transitions. [2023-11-29 03:50:51,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2023-11-29 03:50:51,983 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 324 transitions. [2023-11-29 03:50:51,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 324 transitions. [2023-11-29 03:50:51,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:51,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 324 transitions. [2023-11-29 03:50:51,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 20.25) internal successors, (324), 16 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:51,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 48.0) internal successors, (816), 17 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:51,987 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 48.0) internal successors, (816), 17 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:51,987 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 148 flow. Second operand 16 states and 324 transitions. [2023-11-29 03:50:51,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 133 transitions, 646 flow [2023-11-29 03:50:51,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 133 transitions, 642 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:50:51,991 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 338 flow [2023-11-29 03:50:51,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=338, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-11-29 03:50:51,992 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 29 predicate places. [2023-11-29 03:50:51,992 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 338 flow [2023-11-29 03:50:51,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 15.045454545454545) internal successors, (331), 22 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:51,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:51,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:51,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 03:50:52,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:52,194 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:52,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:52,195 INFO L85 PathProgramCache]: Analyzing trace with hash 998570479, now seen corresponding path program 1 times [2023-11-29 03:50:52,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:52,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656693341] [2023-11-29 03:50:52,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:52,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:52,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:52,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656693341] [2023-11-29 03:50:52,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656693341] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:50:52,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583551263] [2023-11-29 03:50:52,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:52,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:52,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:52,654 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:52,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 03:50:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:52,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 03:50:52,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:52,779 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 [2023-11-29 03:50:53,166 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 15 treesize of output 7 [2023-11-29 03:50:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:53,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:50:53,544 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 [2023-11-29 03:50:53,548 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 [2023-11-29 03:50:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:53,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583551263] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:50:53,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:50:53,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2023-11-29 03:50:53,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640596932] [2023-11-29 03:50:53,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:50:53,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 03:50:53,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:53,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 03:50:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2023-11-29 03:50:54,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2023-11-29 03:50:54,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 338 flow. Second operand has 23 states, 23 states have (on average 15.956521739130435) internal successors, (367), 23 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:54,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:54,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2023-11-29 03:50:54,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:55,779 INFO L124 PetriNetUnfolderBase]: 400/901 cut-off events. [2023-11-29 03:50:55,780 INFO L125 PetriNetUnfolderBase]: For 1726/1793 co-relation queries the response was YES. [2023-11-29 03:50:55,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2718 conditions, 901 events. 400/901 cut-off events. For 1726/1793 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4958 event pairs, 28 based on Foata normal form. 101/956 useless extension candidates. Maximal degree in co-relation 2697. Up to 209 conditions per place. [2023-11-29 03:50:55,789 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 103 selfloop transitions, 42 changer transitions 4/162 dead transitions. [2023-11-29 03:50:55,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 162 transitions, 1050 flow [2023-11-29 03:50:55,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 03:50:55,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 03:50:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 449 transitions. [2023-11-29 03:50:55,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251893939393939 [2023-11-29 03:50:55,792 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 449 transitions. [2023-11-29 03:50:55,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 449 transitions. [2023-11-29 03:50:55,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:55,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 449 transitions. [2023-11-29 03:50:55,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 20.40909090909091) internal successors, (449), 22 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:55,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 48.0) internal successors, (1104), 23 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:55,797 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 48.0) internal successors, (1104), 23 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:55,797 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 338 flow. Second operand 22 states and 449 transitions. [2023-11-29 03:50:55,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 162 transitions, 1050 flow [2023-11-29 03:50:55,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 162 transitions, 1012 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-11-29 03:50:55,806 INFO L231 Difference]: Finished difference. Result has 96 places, 79 transitions, 537 flow [2023-11-29 03:50:55,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=537, PETRI_PLACES=96, PETRI_TRANSITIONS=79} [2023-11-29 03:50:55,807 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 50 predicate places. [2023-11-29 03:50:55,807 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 79 transitions, 537 flow [2023-11-29 03:50:55,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 15.956521739130435) internal successors, (367), 23 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:55,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:55,807 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:55,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 03:50:56,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:56,008 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:56,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:56,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1472521581, now seen corresponding path program 2 times [2023-11-29 03:50:56,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:56,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150054143] [2023-11-29 03:50:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:56,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:57,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:57,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150054143] [2023-11-29 03:50:57,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150054143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:50:57,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663189012] [2023-11-29 03:50:57,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:50:57,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:57,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:57,005 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:57,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 03:50:57,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 03:50:57,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:50:57,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:50:57,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:50:57,235 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:50:57,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663189012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:50:57,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:50:57,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 14 [2023-11-29 03:50:57,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791890655] [2023-11-29 03:50:57,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:50:57,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:50:57,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:57,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:50:57,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-29 03:50:57,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2023-11-29 03:50:57,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 79 transitions, 537 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:57,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:57,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2023-11-29 03:50:57,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:57,525 INFO L124 PetriNetUnfolderBase]: 448/1059 cut-off events. [2023-11-29 03:50:57,525 INFO L125 PetriNetUnfolderBase]: For 3324/3367 co-relation queries the response was YES. [2023-11-29 03:50:57,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3602 conditions, 1059 events. 448/1059 cut-off events. For 3324/3367 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6283 event pairs, 27 based on Foata normal form. 39/1048 useless extension candidates. Maximal degree in co-relation 3575. Up to 276 conditions per place. [2023-11-29 03:50:57,537 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 84 selfloop transitions, 16 changer transitions 2/116 dead transitions. [2023-11-29 03:50:57,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 116 transitions, 922 flow [2023-11-29 03:50:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 03:50:57,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 03:50:57,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2023-11-29 03:50:57,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2023-11-29 03:50:57,539 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 180 transitions. [2023-11-29 03:50:57,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 180 transitions. [2023-11-29 03:50:57,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:57,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 180 transitions. [2023-11-29 03:50:57,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 25.714285714285715) internal successors, (180), 7 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:57,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:57,541 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 48.0) internal successors, (384), 8 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:57,541 INFO L175 Difference]: Start difference. First operand has 96 places, 79 transitions, 537 flow. Second operand 7 states and 180 transitions. [2023-11-29 03:50:57,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 116 transitions, 922 flow [2023-11-29 03:50:57,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 116 transitions, 825 flow, removed 23 selfloop flow, removed 11 redundant places. [2023-11-29 03:50:57,555 INFO L231 Difference]: Finished difference. Result has 94 places, 82 transitions, 517 flow [2023-11-29 03:50:57,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=517, PETRI_PLACES=94, PETRI_TRANSITIONS=82} [2023-11-29 03:50:57,556 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 48 predicate places. [2023-11-29 03:50:57,556 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 82 transitions, 517 flow [2023-11-29 03:50:57,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:57,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:57,556 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:57,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 03:50:57,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:57,762 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:57,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:57,763 INFO L85 PathProgramCache]: Analyzing trace with hash -233000691, now seen corresponding path program 1 times [2023-11-29 03:50:57,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:57,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440092052] [2023-11-29 03:50:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:57,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:57,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:57,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440092052] [2023-11-29 03:50:57,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440092052] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:50:57,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547982557] [2023-11-29 03:50:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:57,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:57,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:57,914 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:57,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 03:50:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:58,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 03:50:58,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:58,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:50:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:58,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547982557] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:50:58,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:50:58,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-29 03:50:58,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995268513] [2023-11-29 03:50:58,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:50:58,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 03:50:58,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:58,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 03:50:58,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-11-29 03:50:58,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2023-11-29 03:50:58,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 82 transitions, 517 flow. Second operand has 18 states, 18 states have (on average 15.833333333333334) internal successors, (285), 18 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:58,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:58,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2023-11-29 03:50:58,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:58,619 INFO L124 PetriNetUnfolderBase]: 412/1023 cut-off events. [2023-11-29 03:50:58,619 INFO L125 PetriNetUnfolderBase]: For 3600/3626 co-relation queries the response was YES. [2023-11-29 03:50:58,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3494 conditions, 1023 events. 412/1023 cut-off events. For 3600/3626 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5988 event pairs, 232 based on Foata normal form. 22/997 useless extension candidates. Maximal degree in co-relation 3464. Up to 470 conditions per place. [2023-11-29 03:50:58,628 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 30 selfloop transitions, 12 changer transitions 49/106 dead transitions. [2023-11-29 03:50:58,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 106 transitions, 782 flow [2023-11-29 03:50:58,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 03:50:58,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 03:50:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2023-11-29 03:50:58,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2023-11-29 03:50:58,630 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 186 transitions. [2023-11-29 03:50:58,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 186 transitions. [2023-11-29 03:50:58,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:58,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 186 transitions. [2023-11-29 03:50:58,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 20.666666666666668) internal successors, (186), 9 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:58,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:58,633 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:58,633 INFO L175 Difference]: Start difference. First operand has 94 places, 82 transitions, 517 flow. Second operand 9 states and 186 transitions. [2023-11-29 03:50:58,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 106 transitions, 782 flow [2023-11-29 03:50:58,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 106 transitions, 762 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-29 03:50:58,647 INFO L231 Difference]: Finished difference. Result has 100 places, 57 transitions, 317 flow [2023-11-29 03:50:58,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=317, PETRI_PLACES=100, PETRI_TRANSITIONS=57} [2023-11-29 03:50:58,648 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 54 predicate places. [2023-11-29 03:50:58,648 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 57 transitions, 317 flow [2023-11-29 03:50:58,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.833333333333334) internal successors, (285), 18 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:58,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:58,649 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:58,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 03:50:58,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 03:50:58,850 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:50:58,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:50:58,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1596471747, now seen corresponding path program 2 times [2023-11-29 03:50:58,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:50:58,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038533798] [2023-11-29 03:50:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:50:58,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:50:58,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:50:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:50:59,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:50:59,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038533798] [2023-11-29 03:50:59,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038533798] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:50:59,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320061535] [2023-11-29 03:50:59,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:50:59,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:50:59,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:50:59,527 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:50:59,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 03:50:59,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 03:50:59,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:50:59,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 03:50:59,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:50:59,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:50:59,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:50:59,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320061535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:50:59,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 03:50:59,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 14 [2023-11-29 03:50:59,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243901421] [2023-11-29 03:50:59,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:50:59,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:50:59,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:50:59,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:50:59,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-29 03:50:59,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2023-11-29 03:50:59,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 57 transitions, 317 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:59,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:50:59,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2023-11-29 03:50:59,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:50:59,958 INFO L124 PetriNetUnfolderBase]: 299/703 cut-off events. [2023-11-29 03:50:59,958 INFO L125 PetriNetUnfolderBase]: For 2438/2442 co-relation queries the response was YES. [2023-11-29 03:50:59,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2376 conditions, 703 events. 299/703 cut-off events. For 2438/2442 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3596 event pairs, 42 based on Foata normal form. 20/689 useless extension candidates. Maximal degree in co-relation 2346. Up to 237 conditions per place. [2023-11-29 03:50:59,963 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 59 selfloop transitions, 7 changer transitions 2/82 dead transitions. [2023-11-29 03:50:59,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 82 transitions, 570 flow [2023-11-29 03:50:59,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:50:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:50:59,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2023-11-29 03:50:59,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2023-11-29 03:50:59,965 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 153 transitions. [2023-11-29 03:50:59,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 153 transitions. [2023-11-29 03:50:59,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:50:59,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 153 transitions. [2023-11-29 03:50:59,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:59,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:59,967 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 48.0) internal successors, (336), 7 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:59,967 INFO L175 Difference]: Start difference. First operand has 100 places, 57 transitions, 317 flow. Second operand 6 states and 153 transitions. [2023-11-29 03:50:59,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 82 transitions, 570 flow [2023-11-29 03:50:59,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 82 transitions, 502 flow, removed 21 selfloop flow, removed 14 redundant places. [2023-11-29 03:50:59,972 INFO L231 Difference]: Finished difference. Result has 78 places, 58 transitions, 300 flow [2023-11-29 03:50:59,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=300, PETRI_PLACES=78, PETRI_TRANSITIONS=58} [2023-11-29 03:50:59,973 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 32 predicate places. [2023-11-29 03:50:59,973 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 58 transitions, 300 flow [2023-11-29 03:50:59,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:50:59,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:50:59,973 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:50:59,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 03:51:00,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 03:51:00,174 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:51:00,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:51:00,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1736367458, now seen corresponding path program 2 times [2023-11-29 03:51:00,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:51:00,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366761719] [2023-11-29 03:51:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:51:00,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:51:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:51:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:51:00,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:51:00,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366761719] [2023-11-29 03:51:00,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366761719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:51:00,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932266665] [2023-11-29 03:51:00,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:51:00,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:51:00,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:51:00,311 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:51:00,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 03:51:00,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:51:00,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:51:00,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 03:51:00,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:51:00,525 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 [2023-11-29 03:51:01,159 INFO L349 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-11-29 03:51:01,160 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 36 treesize of output 15 [2023-11-29 03:51:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:51:01,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:51:01,853 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 [2023-11-29 03:51:01,878 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-11-29 03:51:01,879 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 107 treesize of output 93 [2023-11-29 03:51:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:51:02,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932266665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:51:02,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:51:02,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 11] total 28 [2023-11-29 03:51:02,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38639713] [2023-11-29 03:51:02,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:51:02,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 03:51:02,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:51:02,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 03:51:02,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-11-29 03:51:03,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 48 [2023-11-29 03:51:03,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 58 transitions, 300 flow. Second operand has 29 states, 29 states have (on average 11.310344827586206) internal successors, (328), 29 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:51:03,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:51:03,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 48 [2023-11-29 03:51:03,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:51:08,934 INFO L124 PetriNetUnfolderBase]: 2452/4664 cut-off events. [2023-11-29 03:51:08,935 INFO L125 PetriNetUnfolderBase]: For 11327/11327 co-relation queries the response was YES. [2023-11-29 03:51:08,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14572 conditions, 4664 events. 2452/4664 cut-off events. For 11327/11327 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 29432 event pairs, 161 based on Foata normal form. 290/4713 useless extension candidates. Maximal degree in co-relation 14549. Up to 827 conditions per place. [2023-11-29 03:51:08,969 INFO L140 encePairwiseOnDemand]: 32/48 looper letters, 353 selfloop transitions, 194 changer transitions 141/696 dead transitions. [2023-11-29 03:51:08,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 696 transitions, 4571 flow [2023-11-29 03:51:08,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-29 03:51:08,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2023-11-29 03:51:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 1556 transitions. [2023-11-29 03:51:08,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3376736111111111 [2023-11-29 03:51:08,977 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 1556 transitions. [2023-11-29 03:51:08,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 1556 transitions. [2023-11-29 03:51:08,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:51:08,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 1556 transitions. [2023-11-29 03:51:08,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 16.208333333333332) internal successors, (1556), 96 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:51:08,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 48.0) internal successors, (4656), 97 states have internal predecessors, (4656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:51:08,995 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 48.0) internal successors, (4656), 97 states have internal predecessors, (4656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:51:08,995 INFO L175 Difference]: Start difference. First operand has 78 places, 58 transitions, 300 flow. Second operand 96 states and 1556 transitions. [2023-11-29 03:51:08,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 696 transitions, 4571 flow [2023-11-29 03:51:09,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 696 transitions, 4527 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 03:51:09,027 INFO L231 Difference]: Finished difference. Result has 205 places, 272 transitions, 2533 flow [2023-11-29 03:51:09,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=2533, PETRI_PLACES=205, PETRI_TRANSITIONS=272} [2023-11-29 03:51:09,027 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 159 predicate places. [2023-11-29 03:51:09,028 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 272 transitions, 2533 flow [2023-11-29 03:51:09,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 11.310344827586206) internal successors, (328), 29 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:51:09,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:51:09,028 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:51:09,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 03:51:09,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 03:51:09,229 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:51:09,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:51:09,229 INFO L85 PathProgramCache]: Analyzing trace with hash -443772075, now seen corresponding path program 1 times [2023-11-29 03:51:09,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:51:09,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877210633] [2023-11-29 03:51:09,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:51:09,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:51:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:51:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 03:51:09,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:51:09,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877210633] [2023-11-29 03:51:09,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877210633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:51:09,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:51:09,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:51:09,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356370110] [2023-11-29 03:51:09,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:51:09,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:51:09,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:51:09,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:51:09,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:51:09,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2023-11-29 03:51:09,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 272 transitions, 2533 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:51:09,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:51:09,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2023-11-29 03:51:09,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:51:10,256 INFO L124 PetriNetUnfolderBase]: 2232/4616 cut-off events. [2023-11-29 03:51:10,256 INFO L125 PetriNetUnfolderBase]: For 47281/47483 co-relation queries the response was YES. [2023-11-29 03:51:10,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21981 conditions, 4616 events. 2232/4616 cut-off events. For 47281/47483 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 32056 event pairs, 342 based on Foata normal form. 192/4580 useless extension candidates. Maximal degree in co-relation 21922. Up to 2024 conditions per place. [2023-11-29 03:51:10,290 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 297 selfloop transitions, 4 changer transitions 0/322 dead transitions. [2023-11-29 03:51:10,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 322 transitions, 3688 flow [2023-11-29 03:51:10,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:51:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:51:10,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2023-11-29 03:51:10,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2023-11-29 03:51:10,291 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 95 transitions. [2023-11-29 03:51:10,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 95 transitions. [2023-11-29 03:51:10,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:51:10,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 95 transitions. [2023-11-29 03:51:10,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:51:10,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:51:10,293 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:51:10,293 INFO L175 Difference]: Start difference. First operand has 205 places, 272 transitions, 2533 flow. Second operand 4 states and 95 transitions. [2023-11-29 03:51:10,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 322 transitions, 3688 flow [2023-11-29 03:51:10,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 322 transitions, 2823 flow, removed 387 selfloop flow, removed 17 redundant places. [2023-11-29 03:51:10,437 INFO L231 Difference]: Finished difference. Result has 171 places, 260 transitions, 1706 flow [2023-11-29 03:51:10,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1706, PETRI_PLACES=171, PETRI_TRANSITIONS=260} [2023-11-29 03:51:10,438 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 125 predicate places. [2023-11-29 03:51:10,438 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 260 transitions, 1706 flow [2023-11-29 03:51:10,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:51:10,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:51:10,438 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:51:10,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 03:51:10,438 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:51:10,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:51:10,439 INFO L85 PathProgramCache]: Analyzing trace with hash 529209424, now seen corresponding path program 1 times [2023-11-29 03:51:10,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:51:10,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178121902] [2023-11-29 03:51:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:51:10,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:51:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:51:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:51:11,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:51:11,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178121902] [2023-11-29 03:51:11,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178121902] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:51:11,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002273701] [2023-11-29 03:51:11,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:51:11,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:51:11,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:51:11,112 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:51:11,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 03:51:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:51:11,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 03:51:11,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:51:11,269 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 [2023-11-29 03:51:11,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 36 treesize of output 16 [2023-11-29 03:51:16,517 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-11-29 03:51:16,517 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 50 treesize of output 21 [2023-11-29 03:51:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:51:16,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:51:18,032 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 83 treesize of output 77 [2023-11-29 03:51:18,055 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:51:18,056 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 1422 treesize of output 1226 [2023-11-29 03:51:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:51:18,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002273701] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:51:18,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:51:18,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 44 [2023-11-29 03:51:18,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055350568] [2023-11-29 03:51:18,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:51:18,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 03:51:18,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:51:18,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 03:51:18,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1892, Unknown=1, NotChecked=0, Total=2070 [2023-11-29 03:51:23,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 03:51:27,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 03:51:31,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 03:51:35,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 03:51:40,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 03:51:40,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 48 [2023-11-29 03:51:40,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 260 transitions, 1706 flow. Second operand has 46 states, 46 states have (on average 9.08695652173913) internal successors, (418), 46 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:51:40,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:51:40,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 48 [2023-11-29 03:51:40,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:51:44,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 03:51:48,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 03:51:56,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 03:52:09,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:52:13,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:52:17,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:52:21,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:52:25,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:52:34,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:52:38,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:52:42,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:52:46,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:52:50,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:53:15,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:53:19,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:53:23,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:53:27,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:53:31,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:53:35,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 03:53:43,740 INFO L124 PetriNetUnfolderBase]: 4999/9125 cut-off events. [2023-11-29 03:53:43,740 INFO L125 PetriNetUnfolderBase]: For 80315/80315 co-relation queries the response was YES. [2023-11-29 03:53:43,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39436 conditions, 9125 events. 4999/9125 cut-off events. For 80315/80315 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 57887 event pairs, 583 based on Foata normal form. 184/8747 useless extension candidates. Maximal degree in co-relation 39380. Up to 3354 conditions per place. [2023-11-29 03:53:43,844 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 500 selfloop transitions, 313 changer transitions 18/838 dead transitions. [2023-11-29 03:53:43,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 838 transitions, 7204 flow [2023-11-29 03:53:43,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-29 03:53:43,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-11-29 03:53:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 1115 transitions. [2023-11-29 03:53:43,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28328252032520324 [2023-11-29 03:53:43,849 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 1115 transitions. [2023-11-29 03:53:43,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 1115 transitions. [2023-11-29 03:53:43,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:53:43,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 1115 transitions. [2023-11-29 03:53:43,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 13.597560975609756) internal successors, (1115), 82 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:43,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 48.0) internal successors, (3984), 83 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:43,859 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 48.0) internal successors, (3984), 83 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:43,859 INFO L175 Difference]: Start difference. First operand has 171 places, 260 transitions, 1706 flow. Second operand 82 states and 1115 transitions. [2023-11-29 03:53:43,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 838 transitions, 7204 flow [2023-11-29 03:53:44,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 838 transitions, 7124 flow, removed 39 selfloop flow, removed 3 redundant places. [2023-11-29 03:53:44,076 INFO L231 Difference]: Finished difference. Result has 275 places, 472 transitions, 4566 flow [2023-11-29 03:53:44,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1461, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=4566, PETRI_PLACES=275, PETRI_TRANSITIONS=472} [2023-11-29 03:53:44,077 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 229 predicate places. [2023-11-29 03:53:44,077 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 472 transitions, 4566 flow [2023-11-29 03:53:44,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 9.08695652173913) internal successors, (418), 46 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:44,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:53:44,077 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:53:44,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 03:53:44,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:53:44,278 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:53:44,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:53:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash -75203768, now seen corresponding path program 2 times [2023-11-29 03:53:44,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:53:44,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013868823] [2023-11-29 03:53:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:53:44,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:53:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:53:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:53:45,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:53:45,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013868823] [2023-11-29 03:53:45,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013868823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:53:45,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510039068] [2023-11-29 03:53:45,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:53:45,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:53:45,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:53:45,160 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:53:45,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 03:53:45,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:53:45,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:53:45,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 03:53:45,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:53:45,941 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 03:53:45,941 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 [2023-11-29 03:53:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:53:45,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:53:46,147 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 03:53:46,148 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 26 treesize of output 13 [2023-11-29 03:53:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:53:47,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510039068] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:53:47,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:53:47,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 38 [2023-11-29 03:53:47,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312889947] [2023-11-29 03:53:47,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:53:47,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 03:53:47,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:53:47,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 03:53:47,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 03:53:48,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2023-11-29 03:53:48,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 472 transitions, 4566 flow. Second operand has 40 states, 40 states have (on average 13.8) internal successors, (552), 40 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:53:48,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:53:48,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2023-11-29 03:53:48,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:54:00,071 INFO L124 PetriNetUnfolderBase]: 6215/12815 cut-off events. [2023-11-29 03:54:00,071 INFO L125 PetriNetUnfolderBase]: For 299968/300252 co-relation queries the response was YES. [2023-11-29 03:54:00,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73537 conditions, 12815 events. 6215/12815 cut-off events. For 299968/300252 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 97214 event pairs, 288 based on Foata normal form. 470/12631 useless extension candidates. Maximal degree in co-relation 73451. Up to 2443 conditions per place. [2023-11-29 03:54:00,183 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 700 selfloop transitions, 556 changer transitions 74/1354 dead transitions. [2023-11-29 03:54:00,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1354 transitions, 15663 flow [2023-11-29 03:54:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-29 03:54:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2023-11-29 03:54:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 1480 transitions. [2023-11-29 03:54:00,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39029535864978904 [2023-11-29 03:54:00,187 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 1480 transitions. [2023-11-29 03:54:00,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 1480 transitions. [2023-11-29 03:54:00,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:54:00,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 1480 transitions. [2023-11-29 03:54:00,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 18.734177215189874) internal successors, (1480), 79 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:00,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 48.0) internal successors, (3840), 80 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:00,197 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 48.0) internal successors, (3840), 80 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:00,197 INFO L175 Difference]: Start difference. First operand has 275 places, 472 transitions, 4566 flow. Second operand 79 states and 1480 transitions. [2023-11-29 03:54:00,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1354 transitions, 15663 flow [2023-11-29 03:54:01,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1354 transitions, 14108 flow, removed 712 selfloop flow, removed 21 redundant places. [2023-11-29 03:54:01,827 INFO L231 Difference]: Finished difference. Result has 364 places, 868 transitions, 10032 flow [2023-11-29 03:54:01,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3898, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=10032, PETRI_PLACES=364, PETRI_TRANSITIONS=868} [2023-11-29 03:54:01,828 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 318 predicate places. [2023-11-29 03:54:01,828 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 868 transitions, 10032 flow [2023-11-29 03:54:01,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 13.8) internal successors, (552), 40 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:01,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:54:01,828 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:54:01,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 03:54:02,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:54:02,035 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:54:02,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:54:02,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1285915246, now seen corresponding path program 3 times [2023-11-29 03:54:02,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:54:02,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138130762] [2023-11-29 03:54:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:54:02,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:54:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:54:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:54:02,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:54:02,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138130762] [2023-11-29 03:54:02,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138130762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:54:02,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694876341] [2023-11-29 03:54:02,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:54:02,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:54:02,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:54:02,962 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:54:02,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 03:54:03,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 03:54:03,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:54:03,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 03:54:03,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:54:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:54:03,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:54:03,973 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:54:03,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2023-11-29 03:54:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:54:04,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694876341] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:54:04,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:54:04,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 30 [2023-11-29 03:54:04,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863567729] [2023-11-29 03:54:04,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:54:04,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 03:54:04,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:54:04,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 03:54:04,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2023-11-29 03:54:05,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2023-11-29 03:54:05,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 868 transitions, 10032 flow. Second operand has 32 states, 32 states have (on average 14.125) internal successors, (452), 32 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:05,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:54:05,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2023-11-29 03:54:05,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:54:16,140 INFO L124 PetriNetUnfolderBase]: 8666/18102 cut-off events. [2023-11-29 03:54:16,140 INFO L125 PetriNetUnfolderBase]: For 540740/541100 co-relation queries the response was YES. [2023-11-29 03:54:16,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112061 conditions, 18102 events. 8666/18102 cut-off events. For 540740/541100 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 148720 event pairs, 626 based on Foata normal form. 252/17440 useless extension candidates. Maximal degree in co-relation 111947. Up to 7889 conditions per place. [2023-11-29 03:54:16,341 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 882 selfloop transitions, 647 changer transitions 20/1573 dead transitions. [2023-11-29 03:54:16,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1573 transitions, 20421 flow [2023-11-29 03:54:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 03:54:16,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-11-29 03:54:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 1171 transitions. [2023-11-29 03:54:16,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3696338383838384 [2023-11-29 03:54:16,344 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 1171 transitions. [2023-11-29 03:54:16,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 1171 transitions. [2023-11-29 03:54:16,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:54:16,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 1171 transitions. [2023-11-29 03:54:16,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 17.742424242424242) internal successors, (1171), 66 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:16,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 48.0) internal successors, (3216), 67 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:16,353 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 48.0) internal successors, (3216), 67 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:16,353 INFO L175 Difference]: Start difference. First operand has 364 places, 868 transitions, 10032 flow. Second operand 66 states and 1171 transitions. [2023-11-29 03:54:16,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1573 transitions, 20421 flow [2023-11-29 03:54:19,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 1573 transitions, 19457 flow, removed 418 selfloop flow, removed 27 redundant places. [2023-11-29 03:54:19,209 INFO L231 Difference]: Finished difference. Result has 400 places, 1216 transitions, 15009 flow [2023-11-29 03:54:19,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=9255, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=15009, PETRI_PLACES=400, PETRI_TRANSITIONS=1216} [2023-11-29 03:54:19,210 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 354 predicate places. [2023-11-29 03:54:19,210 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 1216 transitions, 15009 flow [2023-11-29 03:54:19,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 14.125) internal successors, (452), 32 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:19,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:54:19,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:54:19,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 03:54:19,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:54:19,411 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:54:19,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:54:19,411 INFO L85 PathProgramCache]: Analyzing trace with hash -356786816, now seen corresponding path program 4 times [2023-11-29 03:54:19,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:54:19,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063232372] [2023-11-29 03:54:19,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:54:19,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:54:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:54:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:54:20,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:54:20,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063232372] [2023-11-29 03:54:20,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063232372] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:54:20,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136703513] [2023-11-29 03:54:20,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:54:20,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:54:20,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:54:20,257 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:54:20,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 03:54:20,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:54:20,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:54:20,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 03:54:20,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:54:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:54:20,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:54:21,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:54:21,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2023-11-29 03:54:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 03:54:21,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136703513] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:54:21,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:54:21,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 33 [2023-11-29 03:54:21,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044708156] [2023-11-29 03:54:21,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:54:21,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 03:54:21,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:54:21,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 03:54:21,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1083, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 03:54:22,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2023-11-29 03:54:22,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 1216 transitions, 15009 flow. Second operand has 35 states, 35 states have (on average 15.0) internal successors, (525), 35 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:22,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:54:22,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2023-11-29 03:54:22,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:54:32,888 INFO L124 PetriNetUnfolderBase]: 8997/18831 cut-off events. [2023-11-29 03:54:32,888 INFO L125 PetriNetUnfolderBase]: For 501505/501873 co-relation queries the response was YES. [2023-11-29 03:54:33,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116394 conditions, 18831 events. 8997/18831 cut-off events. For 501505/501873 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 155905 event pairs, 944 based on Foata normal form. 168/18049 useless extension candidates. Maximal degree in co-relation 116273. Up to 9481 conditions per place. [2023-11-29 03:54:33,311 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 893 selfloop transitions, 570 changer transitions 14/1501 dead transitions. [2023-11-29 03:54:33,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 1501 transitions, 20966 flow [2023-11-29 03:54:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 03:54:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-29 03:54:33,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 773 transitions. [2023-11-29 03:54:33,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3834325396825397 [2023-11-29 03:54:33,314 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 773 transitions. [2023-11-29 03:54:33,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 773 transitions. [2023-11-29 03:54:33,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:54:33,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 773 transitions. [2023-11-29 03:54:33,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 18.404761904761905) internal successors, (773), 42 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:33,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 48.0) internal successors, (2064), 43 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:33,318 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 48.0) internal successors, (2064), 43 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:33,318 INFO L175 Difference]: Start difference. First operand has 400 places, 1216 transitions, 15009 flow. Second operand 42 states and 773 transitions. [2023-11-29 03:54:33,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 1501 transitions, 20966 flow [2023-11-29 03:54:36,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1501 transitions, 20243 flow, removed 339 selfloop flow, removed 13 redundant places. [2023-11-29 03:54:36,383 INFO L231 Difference]: Finished difference. Result has 435 places, 1282 transitions, 17325 flow [2023-11-29 03:54:36,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=14380, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=17325, PETRI_PLACES=435, PETRI_TRANSITIONS=1282} [2023-11-29 03:54:36,385 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 389 predicate places. [2023-11-29 03:54:36,385 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 1282 transitions, 17325 flow [2023-11-29 03:54:36,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 15.0) internal successors, (525), 35 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:36,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:54:36,385 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:54:36,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 03:54:36,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:54:36,586 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:54:36,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:54:36,586 INFO L85 PathProgramCache]: Analyzing trace with hash 751263586, now seen corresponding path program 1 times [2023-11-29 03:54:36,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:54:36,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827717415] [2023-11-29 03:54:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:54:36,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:54:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:54:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:54:39,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:54:39,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827717415] [2023-11-29 03:54:39,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827717415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:54:39,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727167373] [2023-11-29 03:54:39,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:54:39,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:54:39,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:54:39,003 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:54:39,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 03:54:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:54:39,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 03:54:39,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:54:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:54:39,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:54:40,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:54:40,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 54 [2023-11-29 03:54:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 03:54:40,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727167373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:54:40,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:54:40,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 8] total 41 [2023-11-29 03:54:40,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788711149] [2023-11-29 03:54:40,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:54:40,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 03:54:40,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:54:40,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 03:54:40,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1606, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 03:54:41,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2023-11-29 03:54:41,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 1282 transitions, 17325 flow. Second operand has 43 states, 43 states have (on average 14.883720930232558) internal successors, (640), 43 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:41,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:54:41,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2023-11-29 03:54:41,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:54:57,222 INFO L124 PetriNetUnfolderBase]: 13112/25518 cut-off events. [2023-11-29 03:54:57,222 INFO L125 PetriNetUnfolderBase]: For 614835/614835 co-relation queries the response was YES. [2023-11-29 03:54:57,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164189 conditions, 25518 events. 13112/25518 cut-off events. For 614835/614835 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 211169 event pairs, 805 based on Foata normal form. 108/24230 useless extension candidates. Maximal degree in co-relation 164062. Up to 9812 conditions per place. [2023-11-29 03:54:57,645 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 828 selfloop transitions, 1124 changer transitions 34/1997 dead transitions. [2023-11-29 03:54:57,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 1997 transitions, 30118 flow [2023-11-29 03:54:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-29 03:54:57,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-11-29 03:54:57,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 1317 transitions. [2023-11-29 03:54:57,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976449275362319 [2023-11-29 03:54:57,648 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 1317 transitions. [2023-11-29 03:54:57,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 1317 transitions. [2023-11-29 03:54:57,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:54:57,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 1317 transitions. [2023-11-29 03:54:57,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 19.08695652173913) internal successors, (1317), 69 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:57,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 48.0) internal successors, (3360), 70 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:57,656 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 48.0) internal successors, (3360), 70 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:54:57,656 INFO L175 Difference]: Start difference. First operand has 435 places, 1282 transitions, 17325 flow. Second operand 69 states and 1317 transitions. [2023-11-29 03:54:57,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 1997 transitions, 30118 flow [2023-11-29 03:55:02,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 1997 transitions, 29466 flow, removed 160 selfloop flow, removed 18 redundant places. [2023-11-29 03:55:02,137 INFO L231 Difference]: Finished difference. Result has 505 places, 1622 transitions, 25648 flow [2023-11-29 03:55:02,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=16893, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=790, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=25648, PETRI_PLACES=505, PETRI_TRANSITIONS=1622} [2023-11-29 03:55:02,139 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 459 predicate places. [2023-11-29 03:55:02,139 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 1622 transitions, 25648 flow [2023-11-29 03:55:02,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 14.883720930232558) internal successors, (640), 43 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:02,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:55:02,139 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:55:02,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 03:55:02,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 03:55:02,340 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:55:02,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:55:02,340 INFO L85 PathProgramCache]: Analyzing trace with hash -481593650, now seen corresponding path program 2 times [2023-11-29 03:55:02,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:55:02,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243217740] [2023-11-29 03:55:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:55:02,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:55:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:55:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:55:04,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:55:04,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243217740] [2023-11-29 03:55:04,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243217740] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:55:04,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098506011] [2023-11-29 03:55:04,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 03:55:04,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:55:04,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:55:04,788 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:55:04,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 03:55:04,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 03:55:04,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:55:04,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 03:55:04,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:55:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:55:05,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:55:06,190 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:55:06,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 54 [2023-11-29 03:55:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 03:55:06,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098506011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:55:06,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:55:06,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 8] total 41 [2023-11-29 03:55:06,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817473447] [2023-11-29 03:55:06,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:55:06,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 03:55:06,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:55:06,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 03:55:06,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1628, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 03:55:08,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2023-11-29 03:55:08,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 1622 transitions, 25648 flow. Second operand has 43 states, 43 states have (on average 14.837209302325581) internal successors, (638), 43 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:08,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:55:08,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2023-11-29 03:55:08,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:55:27,018 INFO L124 PetriNetUnfolderBase]: 13482/26734 cut-off events. [2023-11-29 03:55:27,019 INFO L125 PetriNetUnfolderBase]: For 756544/756544 co-relation queries the response was YES. [2023-11-29 03:55:27,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185794 conditions, 26734 events. 13482/26734 cut-off events. For 756544/756544 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 225287 event pairs, 589 based on Foata normal form. 58/25346 useless extension candidates. Maximal degree in co-relation 185646. Up to 9680 conditions per place. [2023-11-29 03:55:27,462 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 882 selfloop transitions, 1158 changer transitions 32/2083 dead transitions. [2023-11-29 03:55:27,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 576 places, 2083 transitions, 35553 flow [2023-11-29 03:55:27,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-29 03:55:27,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-11-29 03:55:27,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 1360 transitions. [2023-11-29 03:55:27,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39351851851851855 [2023-11-29 03:55:27,465 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 1360 transitions. [2023-11-29 03:55:27,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 1360 transitions. [2023-11-29 03:55:27,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:55:27,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 1360 transitions. [2023-11-29 03:55:27,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 18.88888888888889) internal successors, (1360), 72 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:27,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 48.0) internal successors, (3504), 73 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:27,471 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 48.0) internal successors, (3504), 73 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:27,471 INFO L175 Difference]: Start difference. First operand has 505 places, 1622 transitions, 25648 flow. Second operand 72 states and 1360 transitions. [2023-11-29 03:55:27,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 576 places, 2083 transitions, 35553 flow [2023-11-29 03:55:34,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 2083 transitions, 34544 flow, removed 372 selfloop flow, removed 17 redundant places. [2023-11-29 03:55:34,230 INFO L231 Difference]: Finished difference. Result has 568 places, 1736 transitions, 30271 flow [2023-11-29 03:55:34,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=24770, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1045, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=30271, PETRI_PLACES=568, PETRI_TRANSITIONS=1736} [2023-11-29 03:55:34,232 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 522 predicate places. [2023-11-29 03:55:34,232 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 1736 transitions, 30271 flow [2023-11-29 03:55:34,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 14.837209302325581) internal successors, (638), 43 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:34,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:55:34,232 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:55:34,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 03:55:34,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 03:55:34,433 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:55:34,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:55:34,433 INFO L85 PathProgramCache]: Analyzing trace with hash 667577218, now seen corresponding path program 3 times [2023-11-29 03:55:34,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:55:34,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419332260] [2023-11-29 03:55:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:55:34,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:55:34,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:55:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:55:37,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:55:37,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419332260] [2023-11-29 03:55:37,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419332260] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:55:37,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523398453] [2023-11-29 03:55:37,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 03:55:37,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:55:37,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:55:37,260 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:55:37,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 03:55:37,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 03:55:37,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:55:37,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 03:55:37,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:55:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 03:55:37,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:55:38,469 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:55:38,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 54 [2023-11-29 03:55:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 03:55:38,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523398453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:55:38,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:55:38,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 8] total 35 [2023-11-29 03:55:38,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653662144] [2023-11-29 03:55:38,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:55:38,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 03:55:38,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:55:38,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 03:55:38,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 03:55:40,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2023-11-29 03:55:40,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 1736 transitions, 30271 flow. Second operand has 37 states, 37 states have (on average 13.972972972972974) internal successors, (517), 37 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:55:40,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:55:40,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2023-11-29 03:55:40,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:56:00,769 INFO L124 PetriNetUnfolderBase]: 13794/27452 cut-off events. [2023-11-29 03:56:00,769 INFO L125 PetriNetUnfolderBase]: For 765822/765822 co-relation queries the response was YES. [2023-11-29 03:56:01,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195164 conditions, 27452 events. 13794/27452 cut-off events. For 765822/765822 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 233600 event pairs, 933 based on Foata normal form. 58/26004 useless extension candidates. Maximal degree in co-relation 195010. Up to 11400 conditions per place. [2023-11-29 03:56:01,192 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 1146 selfloop transitions, 1113 changer transitions 28/2298 dead transitions. [2023-11-29 03:56:01,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 641 places, 2298 transitions, 42160 flow [2023-11-29 03:56:01,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-29 03:56:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-11-29 03:56:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 1346 transitions. [2023-11-29 03:56:01,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37894144144144143 [2023-11-29 03:56:01,195 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 1346 transitions. [2023-11-29 03:56:01,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 1346 transitions. [2023-11-29 03:56:01,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:56:01,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 1346 transitions. [2023-11-29 03:56:01,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 18.18918918918919) internal successors, (1346), 74 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:01,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 48.0) internal successors, (3600), 75 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:01,202 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 48.0) internal successors, (3600), 75 states have internal predecessors, (3600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:01,202 INFO L175 Difference]: Start difference. First operand has 568 places, 1736 transitions, 30271 flow. Second operand 74 states and 1346 transitions. [2023-11-29 03:56:01,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 641 places, 2298 transitions, 42160 flow [2023-11-29 03:56:08,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 2298 transitions, 40877 flow, removed 222 selfloop flow, removed 39 redundant places. [2023-11-29 03:56:08,922 INFO L231 Difference]: Finished difference. Result has 613 places, 1867 transitions, 34902 flow [2023-11-29 03:56:08,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=28977, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=978, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=727, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=34902, PETRI_PLACES=613, PETRI_TRANSITIONS=1867} [2023-11-29 03:56:08,924 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 567 predicate places. [2023-11-29 03:56:08,924 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 1867 transitions, 34902 flow [2023-11-29 03:56:08,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 13.972972972972974) internal successors, (517), 37 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:08,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:56:08,924 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:56:08,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 03:56:09,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 03:56:09,125 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:56:09,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:56:09,125 INFO L85 PathProgramCache]: Analyzing trace with hash 116825054, now seen corresponding path program 4 times [2023-11-29 03:56:09,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:56:09,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423448396] [2023-11-29 03:56:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:56:09,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:56:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:56:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:56:11,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:56:11,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423448396] [2023-11-29 03:56:11,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423448396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:56:11,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262930976] [2023-11-29 03:56:11,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 03:56:11,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:56:11,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:56:11,541 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:56:11,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 03:56:11,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 03:56:11,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:56:11,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 03:56:11,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:56:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 03:56:12,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:56:13,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 03:56:13,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 54 [2023-11-29 03:56:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-29 03:56:13,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262930976] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:56:13,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:56:13,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 8] total 41 [2023-11-29 03:56:13,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876732453] [2023-11-29 03:56:13,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:56:13,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 03:56:13,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:56:13,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 03:56:13,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1629, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 03:56:14,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2023-11-29 03:56:14,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 1867 transitions, 34902 flow. Second operand has 43 states, 43 states have (on average 14.837209302325581) internal successors, (638), 43 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:14,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:56:14,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2023-11-29 03:56:14,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:56:33,897 INFO L124 PetriNetUnfolderBase]: 13953/27827 cut-off events. [2023-11-29 03:56:33,898 INFO L125 PetriNetUnfolderBase]: For 818521/818521 co-relation queries the response was YES. [2023-11-29 03:56:34,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205576 conditions, 27827 events. 13953/27827 cut-off events. For 818521/818521 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 238039 event pairs, 919 based on Foata normal form. 58/26369 useless extension candidates. Maximal degree in co-relation 205414. Up to 11857 conditions per place. [2023-11-29 03:56:34,339 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 1131 selfloop transitions, 1056 changer transitions 18/2216 dead transitions. [2023-11-29 03:56:34,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 2216 transitions, 44026 flow [2023-11-29 03:56:34,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 03:56:34,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-29 03:56:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 840 transitions. [2023-11-29 03:56:34,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2023-11-29 03:56:34,341 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 840 transitions. [2023-11-29 03:56:34,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 840 transitions. [2023-11-29 03:56:34,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:56:34,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 840 transitions. [2023-11-29 03:56:34,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 19.09090909090909) internal successors, (840), 44 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:34,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 48.0) internal successors, (2160), 45 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:34,345 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 48.0) internal successors, (2160), 45 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:34,345 INFO L175 Difference]: Start difference. First operand has 613 places, 1867 transitions, 34902 flow. Second operand 44 states and 840 transitions. [2023-11-29 03:56:34,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 2216 transitions, 44026 flow [2023-11-29 03:56:43,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 2216 transitions, 42505 flow, removed 205 selfloop flow, removed 26 redundant places. [2023-11-29 03:56:43,095 INFO L231 Difference]: Finished difference. Result has 638 places, 1931 transitions, 38266 flow [2023-11-29 03:56:43,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=33358, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=987, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=854, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=38266, PETRI_PLACES=638, PETRI_TRANSITIONS=1931} [2023-11-29 03:56:43,097 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 592 predicate places. [2023-11-29 03:56:43,097 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 1931 transitions, 38266 flow [2023-11-29 03:56:43,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 14.837209302325581) internal successors, (638), 43 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:43,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:56:43,098 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:56:43,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 03:56:43,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 03:56:43,298 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:56:43,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:56:43,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1296128462, now seen corresponding path program 5 times [2023-11-29 03:56:43,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:56:43,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459861300] [2023-11-29 03:56:43,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:56:43,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:56:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:56:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:56:43,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:56:43,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459861300] [2023-11-29 03:56:43,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459861300] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:56:43,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63435739] [2023-11-29 03:56:43,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:56:43,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:56:43,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:56:43,507 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:56:43,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 03:56:43,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 03:56:43,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:56:43,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 03:56:43,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:56:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:56:43,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:56:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 03:56:44,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63435739] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:56:44,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:56:44,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-11-29 03:56:44,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576937585] [2023-11-29 03:56:44,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:56:44,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 03:56:44,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:56:44,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 03:56:44,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2023-11-29 03:56:44,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2023-11-29 03:56:44,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 1931 transitions, 38266 flow. Second operand has 30 states, 30 states have (on average 15.9) internal successors, (477), 30 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:44,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:56:44,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2023-11-29 03:56:44,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:56:53,396 INFO L124 PetriNetUnfolderBase]: 7322/16270 cut-off events. [2023-11-29 03:56:53,396 INFO L125 PetriNetUnfolderBase]: For 431635/431853 co-relation queries the response was YES. [2023-11-29 03:56:53,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114306 conditions, 16270 events. 7322/16270 cut-off events. For 431635/431853 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 149904 event pairs, 3086 based on Foata normal form. 298/15658 useless extension candidates. Maximal degree in co-relation 114152. Up to 10028 conditions per place. [2023-11-29 03:56:53,620 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 1038 selfloop transitions, 12 changer transitions 259/1392 dead transitions. [2023-11-29 03:56:53,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 1392 transitions, 30169 flow [2023-11-29 03:56:53,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 03:56:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 03:56:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 255 transitions. [2023-11-29 03:56:53,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40865384615384615 [2023-11-29 03:56:53,621 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 255 transitions. [2023-11-29 03:56:53,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 255 transitions. [2023-11-29 03:56:53,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:56:53,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 255 transitions. [2023-11-29 03:56:53,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 19.615384615384617) internal successors, (255), 13 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:53,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:53,622 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:53,622 INFO L175 Difference]: Start difference. First operand has 638 places, 1931 transitions, 38266 flow. Second operand 13 states and 255 transitions. [2023-11-29 03:56:53,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 1392 transitions, 30169 flow [2023-11-29 03:56:57,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 1392 transitions, 29061 flow, removed 420 selfloop flow, removed 45 redundant places. [2023-11-29 03:56:57,847 INFO L231 Difference]: Finished difference. Result has 552 places, 1133 transitions, 21981 flow [2023-11-29 03:56:57,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=26270, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=21981, PETRI_PLACES=552, PETRI_TRANSITIONS=1133} [2023-11-29 03:56:57,848 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 506 predicate places. [2023-11-29 03:56:57,848 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 1133 transitions, 21981 flow [2023-11-29 03:56:57,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 15.9) internal successors, (477), 30 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:57,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:56:57,849 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:56:57,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-29 03:56:58,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 03:56:58,049 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:56:58,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:56:58,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1335626627, now seen corresponding path program 5 times [2023-11-29 03:56:58,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:56:58,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612520559] [2023-11-29 03:56:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:56:58,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:56:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:56:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 03:56:58,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:56:58,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612520559] [2023-11-29 03:56:58,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612520559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:56:58,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204527353] [2023-11-29 03:56:58,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 03:56:58,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:56:58,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:56:58,237 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:56:58,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 03:56:58,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 03:56:58,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:56:58,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 03:56:58,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:56:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:56:58,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:56:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:56:58,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204527353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:56:58,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:56:58,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 17 [2023-11-29 03:56:58,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106729262] [2023-11-29 03:56:58,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:56:58,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 03:56:58,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:56:58,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 03:56:58,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-11-29 03:56:58,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2023-11-29 03:56:58,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 1133 transitions, 21981 flow. Second operand has 18 states, 18 states have (on average 16.38888888888889) internal successors, (295), 18 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:56:58,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:56:58,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2023-11-29 03:56:58,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:57:12,795 INFO L124 PetriNetUnfolderBase]: 17006/32364 cut-off events. [2023-11-29 03:57:12,796 INFO L125 PetriNetUnfolderBase]: For 664842/665394 co-relation queries the response was YES. [2023-11-29 03:57:13,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214459 conditions, 32364 events. 17006/32364 cut-off events. For 664842/665394 co-relation queries the response was YES. Maximal size of possible extension queue 892. Compared 280565 event pairs, 684 based on Foata normal form. 404/31326 useless extension candidates. Maximal degree in co-relation 214332. Up to 6750 conditions per place. [2023-11-29 03:57:13,394 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 948 selfloop transitions, 1306 changer transitions 116/2446 dead transitions. [2023-11-29 03:57:13,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 2446 transitions, 50284 flow [2023-11-29 03:57:13,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 03:57:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-29 03:57:13,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 802 transitions. [2023-11-29 03:57:13,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46412037037037035 [2023-11-29 03:57:13,396 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 802 transitions. [2023-11-29 03:57:13,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 802 transitions. [2023-11-29 03:57:13,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:57:13,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 802 transitions. [2023-11-29 03:57:13,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 22.27777777777778) internal successors, (802), 36 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:57:13,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 48.0) internal successors, (1776), 37 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:57:13,398 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 48.0) internal successors, (1776), 37 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:57:13,399 INFO L175 Difference]: Start difference. First operand has 552 places, 1133 transitions, 21981 flow. Second operand 36 states and 802 transitions. [2023-11-29 03:57:13,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 2446 transitions, 50284 flow [2023-11-29 03:57:21,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 2446 transitions, 46906 flow, removed 536 selfloop flow, removed 48 redundant places. [2023-11-29 03:57:21,409 INFO L231 Difference]: Finished difference. Result has 453 places, 1864 transitions, 36749 flow [2023-11-29 03:57:21,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=20514, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=36749, PETRI_PLACES=453, PETRI_TRANSITIONS=1864} [2023-11-29 03:57:21,410 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 407 predicate places. [2023-11-29 03:57:21,410 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 1864 transitions, 36749 flow [2023-11-29 03:57:21,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 16.38888888888889) internal successors, (295), 18 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:57:21,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:57:21,411 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:57:21,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 03:57:21,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 03:57:21,611 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:57:21,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:57:21,612 INFO L85 PathProgramCache]: Analyzing trace with hash 906932995, now seen corresponding path program 6 times [2023-11-29 03:57:21,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:57:21,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553774266] [2023-11-29 03:57:21,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:57:21,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:57:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:57:21,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:57:21,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:57:21,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553774266] [2023-11-29 03:57:21,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553774266] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:57:21,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881878050] [2023-11-29 03:57:21,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 03:57:21,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:57:21,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:57:21,768 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:57:21,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 03:57:22,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 03:57:22,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 03:57:22,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 03:57:22,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:57:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:57:22,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:57:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 03:57:22,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881878050] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:57:22,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:57:22,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 16 [2023-11-29 03:57:22,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766563994] [2023-11-29 03:57:22,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:57:22,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 03:57:22,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:57:22,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 03:57:22,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-11-29 03:57:22,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2023-11-29 03:57:22,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 1864 transitions, 36749 flow. Second operand has 17 states, 17 states have (on average 16.529411764705884) internal successors, (281), 17 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:57:22,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:57:22,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2023-11-29 03:57:22,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:57:43,777 INFO L124 PetriNetUnfolderBase]: 22033/42207 cut-off events. [2023-11-29 03:57:43,777 INFO L125 PetriNetUnfolderBase]: For 678918/680060 co-relation queries the response was YES. [2023-11-29 03:57:44,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276156 conditions, 42207 events. 22033/42207 cut-off events. For 678918/680060 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 376890 event pairs, 1556 based on Foata normal form. 444/40793 useless extension candidates. Maximal degree in co-relation 276044. Up to 7991 conditions per place. [2023-11-29 03:57:44,489 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 1255 selfloop transitions, 1721 changer transitions 138/3190 dead transitions. [2023-11-29 03:57:44,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 3190 transitions, 66926 flow [2023-11-29 03:57:44,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 03:57:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-29 03:57:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 889 transitions. [2023-11-29 03:57:44,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630208333333333 [2023-11-29 03:57:44,491 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 889 transitions. [2023-11-29 03:57:44,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 889 transitions. [2023-11-29 03:57:44,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:57:44,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 889 transitions. [2023-11-29 03:57:44,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 22.225) internal successors, (889), 40 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:57:44,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 48.0) internal successors, (1968), 41 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:57:44,494 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 48.0) internal successors, (1968), 41 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:57:44,494 INFO L175 Difference]: Start difference. First operand has 453 places, 1864 transitions, 36749 flow. Second operand 40 states and 889 transitions. [2023-11-29 03:57:44,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 3190 transitions, 66926 flow [2023-11-29 03:57:58,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 3190 transitions, 66060 flow, removed 413 selfloop flow, removed 8 redundant places. [2023-11-29 03:57:58,185 INFO L231 Difference]: Finished difference. Result has 498 places, 2472 transitions, 54876 flow [2023-11-29 03:57:58,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=36149, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=54876, PETRI_PLACES=498, PETRI_TRANSITIONS=2472} [2023-11-29 03:57:58,187 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 452 predicate places. [2023-11-29 03:57:58,187 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 2472 transitions, 54876 flow [2023-11-29 03:57:58,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 16.529411764705884) internal successors, (281), 17 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:57:58,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:57:58,187 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:57:58,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 03:57:58,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 03:57:58,388 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 03:57:58,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:57:58,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1217134356, now seen corresponding path program 7 times [2023-11-29 03:57:58,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:57:58,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528151282] [2023-11-29 03:57:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:57:58,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:57:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:57:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:57:59,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:57:59,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528151282] [2023-11-29 03:57:59,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528151282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:57:59,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341287192] [2023-11-29 03:57:59,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 03:57:59,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:57:59,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:57:59,407 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:57:59,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 03:57:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:57:59,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 03:57:59,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:58:00,673 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 03:58:00,674 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 23 treesize of output 10 [2023-11-29 03:58:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:58:00,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:58:00,994 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 03:58:00,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-11-29 03:58:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:58:02,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341287192] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:58:02,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:58:02,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2023-11-29 03:58:02,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427755939] [2023-11-29 03:58:02,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:58:02,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-29 03:58:02,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:58:02,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-29 03:58:02,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=3476, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 03:58:04,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2023-11-29 03:58:04,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 2472 transitions, 54876 flow. Second operand has 62 states, 62 states have (on average 12.693548387096774) internal successors, (787), 62 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:58:04,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:58:04,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2023-11-29 03:58:04,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:59:55,074 INFO L124 PetriNetUnfolderBase]: 60223/117151 cut-off events. [2023-11-29 03:59:55,074 INFO L125 PetriNetUnfolderBase]: For 2562978/2563472 co-relation queries the response was YES. [2023-11-29 03:59:56,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 869357 conditions, 117151 events. 60223/117151 cut-off events. For 2562978/2563472 co-relation queries the response was YES. Maximal size of possible extension queue 1923. Compared 1187516 event pairs, 5241 based on Foata normal form. 2422/112849 useless extension candidates. Maximal degree in co-relation 869225. Up to 23635 conditions per place. [2023-11-29 03:59:57,286 INFO L140 encePairwiseOnDemand]: 34/48 looper letters, 3328 selfloop transitions, 5507 changer transitions 14/8950 dead transitions. [2023-11-29 03:59:57,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 8950 transitions, 204987 flow [2023-11-29 03:59:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 221 states. [2023-11-29 03:59:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2023-11-29 03:59:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 3935 transitions. [2023-11-29 03:59:57,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37094645550527905 [2023-11-29 03:59:57,291 INFO L72 ComplementDD]: Start complementDD. Operand 221 states and 3935 transitions. [2023-11-29 03:59:57,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 221 states and 3935 transitions. [2023-11-29 03:59:57,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:59:57,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 221 states and 3935 transitions. [2023-11-29 03:59:57,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 222 states, 221 states have (on average 17.805429864253394) internal successors, (3935), 221 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:59:57,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 222 states, 222 states have (on average 48.0) internal successors, (10656), 222 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:59:57,306 INFO L81 ComplementDD]: Finished complementDD. Result has 222 states, 222 states have (on average 48.0) internal successors, (10656), 222 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 03:59:57,306 INFO L175 Difference]: Start difference. First operand has 498 places, 2472 transitions, 54876 flow. Second operand 221 states and 3935 transitions. [2023-11-29 03:59:57,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 8950 transitions, 204987 flow [2023-11-29 04:01:24,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 8950 transitions, 200732 flow, removed 1859 selfloop flow, removed 12 redundant places. [2023-11-29 04:01:24,839 INFO L231 Difference]: Finished difference. Result has 804 places, 7506 transitions, 186646 flow [2023-11-29 04:01:24,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=53762, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=221, PETRI_FLOW=186646, PETRI_PLACES=804, PETRI_TRANSITIONS=7506} [2023-11-29 04:01:24,841 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 758 predicate places. [2023-11-29 04:01:24,841 INFO L495 AbstractCegarLoop]: Abstraction has has 804 places, 7506 transitions, 186646 flow [2023-11-29 04:01:24,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 12.693548387096774) internal successors, (787), 62 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:24,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 04:01:24,842 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:01:24,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 04:01:25,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:01:25,042 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2023-11-29 04:01:25,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:01:25,043 INFO L85 PathProgramCache]: Analyzing trace with hash 435608394, now seen corresponding path program 8 times [2023-11-29 04:01:25,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:01:25,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031615280] [2023-11-29 04:01:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:01:25,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:01:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:01:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:01:25,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:01:25,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031615280] [2023-11-29 04:01:25,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031615280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:01:25,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528393872] [2023-11-29 04:01:25,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:01:25,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:01:25,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:01:25,917 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:01:25,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4d4dc1a-4b11-4dc1-890d-bf45b5447b1a/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 04:01:26,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:01:26,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:01:26,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 04:01:26,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:01:26,220 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 [2023-11-29 04:01:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:01:27,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:01:29,585 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 [2023-11-29 04:01:29,597 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 04:01:29,598 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 [2023-11-29 04:01:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:01:30,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528393872] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:01:30,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:01:30,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 62 [2023-11-29 04:01:30,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087261103] [2023-11-29 04:01:30,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:01:30,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-29 04:01:30,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:01:30,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-29 04:01:30,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=3524, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 04:01:32,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2023-11-29 04:01:32,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 804 places, 7506 transitions, 186646 flow. Second operand has 64 states, 64 states have (on average 12.640625) internal successors, (809), 64 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:01:32,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 04:01:32,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2023-11-29 04:01:32,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand