./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 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_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/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_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/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_f9b50d45-415c-4487-983b-3fa102b3a355/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 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:55:19,996 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:55:20,064 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 06:55:20,068 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:55:20,069 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:55:20,091 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:55:20,092 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:55:20,093 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:55:20,093 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:55:20,094 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:55:20,094 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:55:20,095 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:55:20,096 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:55:20,096 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:55:20,097 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:55:20,097 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:55:20,098 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:55:20,098 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:55:20,099 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:55:20,099 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:55:20,100 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:55:20,100 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:55:20,101 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:55:20,101 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:55:20,102 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 06:55:20,102 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 06:55:20,103 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:55:20,103 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:55:20,103 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:55:20,104 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:55:20,104 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:55:20,105 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:55:20,105 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:55:20,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:55:20,106 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:55:20,106 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:55:20,106 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:55:20,106 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:55:20,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:55:20,107 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:55:20,107 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:55:20,107 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:55:20,107 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:55:20,108 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:55:20,108 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_f9b50d45-415c-4487-983b-3fa102b3a355/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2023-11-29 06:55:20,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:55:20,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:55:20,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:55:20,364 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:55:20,364 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:55:20,365 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-29 06:55:23,142 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:55:23,332 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:55:23,332 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-11-29 06:55:23,341 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/data/fcf219c90/7c99c4f28fcb4ead93c305c5a9faabe3/FLAG5d93f8651 [2023-11-29 06:55:23,356 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/data/fcf219c90/7c99c4f28fcb4ead93c305c5a9faabe3 [2023-11-29 06:55:23,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:55:23,360 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:55:23,362 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:55:23,362 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:55:23,367 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:55:23,368 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:55:23" (1/1) ... [2023-11-29 06:55:23,369 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2882c4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:55:23, skipping insertion in model container [2023-11-29 06:55:23,369 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:55:23" (1/1) ... [2023-11-29 06:55:23,395 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:55:23,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:55:23,599 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:55:23,626 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:55:23,635 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:55:23,635 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:55:23,643 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:55:23,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:55:23 WrapperNode [2023-11-29 06:55:23,644 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:55:23,645 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:55:23,645 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:55:23,646 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:55:23,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:55:23" (1/1) ... [2023-11-29 06:55:23,662 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:55:23" (1/1) ... [2023-11-29 06:55:23,691 INFO L138 Inliner]: procedures = 25, calls = 40, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 185 [2023-11-29 06:55:23,692 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:55:23,692 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:55:23,692 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:55:23,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:55:23,701 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:55:23" (1/1) ... [2023-11-29 06:55:23,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:55:23" (1/1) ... [2023-11-29 06:55:23,704 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:55:23" (1/1) ... [2023-11-29 06:55:23,718 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 4, 2, 2]. 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 06:55:23,718 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:55:23" (1/1) ... [2023-11-29 06:55:23,718 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:55:23" (1/1) ... [2023-11-29 06:55:23,725 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:55:23" (1/1) ... [2023-11-29 06:55:23,729 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:55:23" (1/1) ... [2023-11-29 06:55:23,731 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:55:23" (1/1) ... [2023-11-29 06:55:23,732 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:55:23" (1/1) ... [2023-11-29 06:55:23,735 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:55:23,736 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:55:23,736 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:55:23,736 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:55:23,737 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:55:23" (1/1) ... [2023-11-29 06:55:23,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:55:23,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:23,767 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:55:23,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:55:23,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:55:23,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:55:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 06:55:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 06:55:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 06:55:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 06:55:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 06:55:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 06:55:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 06:55:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 06:55:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:55:23,806 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:55:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:55:23,806 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:55:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:55:23,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 06:55:23,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 06:55:23,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 06:55:23,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 06:55:23,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 06:55:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:55:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:55:23,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:55:23,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:55:23,810 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 06:55:23,943 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:55:23,945 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:55:24,254 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:55:24,560 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:55:24,560 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 06:55:24,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:55:24 BoogieIcfgContainer [2023-11-29 06:55:24,561 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:55:24,564 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:55:24,564 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:55:24,567 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:55:24,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:55:23" (1/3) ... [2023-11-29 06:55:24,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef9f590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:55:24, skipping insertion in model container [2023-11-29 06:55:24,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:55:23" (2/3) ... [2023-11-29 06:55:24,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef9f590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:55:24, skipping insertion in model container [2023-11-29 06:55:24,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:55:24" (3/3) ... [2023-11-29 06:55:24,570 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-11-29 06:55:24,579 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 06:55:24,590 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:55:24,590 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-11-29 06:55:24,591 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:55:24,648 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 06:55:24,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 45 transitions, 104 flow [2023-11-29 06:55:24,709 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2023-11-29 06:55:24,709 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:55:24,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 43 events. 4/43 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 113 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-11-29 06:55:24,713 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 45 transitions, 104 flow [2023-11-29 06:55:24,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 41 transitions, 91 flow [2023-11-29 06:55:24,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:55:24,733 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;@58712019, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:55:24,733 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-11-29 06:55:24,737 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:55:24,737 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-29 06:55:24,737 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:55:24,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:24,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 06:55:24,739 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:24,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:24,745 INFO L85 PathProgramCache]: Analyzing trace with hash 554841, now seen corresponding path program 1 times [2023-11-29 06:55:24,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:24,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747313708] [2023-11-29 06:55:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:24,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:25,031 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 06:55:25,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:25,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747313708] [2023-11-29 06:55:25,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747313708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:25,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:55:25,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:55:25,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249617460] [2023-11-29 06:55:25,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:25,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:55:25,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:25,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:55:25,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:55:25,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-29 06:55:25,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 06:55:25,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:25,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-29 06:55:25,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:25,285 INFO L124 PetriNetUnfolderBase]: 182/407 cut-off events. [2023-11-29 06:55:25,286 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-29 06:55:25,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 407 events. 182/407 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2093 event pairs, 159 based on Foata normal form. 21/321 useless extension candidates. Maximal degree in co-relation 679. Up to 319 conditions per place. [2023-11-29 06:55:25,294 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 25 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-11-29 06:55:25,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 147 flow [2023-11-29 06:55:25,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:55:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:55:25,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2023-11-29 06:55:25,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2023-11-29 06:55:25,309 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 87 transitions. [2023-11-29 06:55:25,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 87 transitions. [2023-11-29 06:55:25,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:25,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 87 transitions. [2023-11-29 06:55:25,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 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 06:55:25,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 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 06:55:25,320 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 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 06:55:25,322 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 91 flow. Second operand 4 states and 87 transitions. [2023-11-29 06:55:25,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 147 flow [2023-11-29 06:55:25,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 142 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:55:25,329 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 107 flow [2023-11-29 06:55:25,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-11-29 06:55:25,335 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-11-29 06:55:25,335 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 107 flow [2023-11-29 06:55:25,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 06:55:25,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:25,336 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-29 06:55:25,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 06:55:25,336 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:25,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:25,337 INFO L85 PathProgramCache]: Analyzing trace with hash -650048995, now seen corresponding path program 1 times [2023-11-29 06:55:25,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:25,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282278997] [2023-11-29 06:55:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:25,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:25,471 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 06:55:25,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:25,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282278997] [2023-11-29 06:55:25,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282278997] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:25,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427542988] [2023-11-29 06:55:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:25,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:25,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:25,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:25,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:55:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:25,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:55:25,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:25,621 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 06:55:25,622 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:55:25,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427542988] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:25,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:55:25,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-29 06:55:25,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116102173] [2023-11-29 06:55:25,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:25,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:55:25,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:25,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:55:25,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:55:25,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-29 06:55:25,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 107 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:25,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:25,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-29 06:55:25,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:25,811 INFO L124 PetriNetUnfolderBase]: 182/406 cut-off events. [2023-11-29 06:55:25,811 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 06:55:25,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 406 events. 182/406 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2092 event pairs, 159 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 733. Up to 314 conditions per place. [2023-11-29 06:55:25,817 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 21 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2023-11-29 06:55:25,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 159 flow [2023-11-29 06:55:25,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:55:25,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:55:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2023-11-29 06:55:25,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3962962962962963 [2023-11-29 06:55:25,820 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 107 transitions. [2023-11-29 06:55:25,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 107 transitions. [2023-11-29 06:55:25,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:25,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 107 transitions. [2023-11-29 06:55:25,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 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 06:55:25,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 45.0) internal successors, (315), 7 states have internal predecessors, (315), 0 states have call successors, (0), 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 06:55:25,824 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 45.0) internal successors, (315), 7 states have internal predecessors, (315), 0 states have call successors, (0), 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 06:55:25,824 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 107 flow. Second operand 6 states and 107 transitions. [2023-11-29 06:55:25,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 159 flow [2023-11-29 06:55:25,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:55:25,826 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 114 flow [2023-11-29 06:55:25,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-11-29 06:55:25,828 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-11-29 06:55:25,828 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 114 flow [2023-11-29 06:55:25,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:25,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:25,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 06:55:25,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:55:26,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:26,035 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:26,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash -648194816, now seen corresponding path program 1 times [2023-11-29 06:55:26,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:26,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207900972] [2023-11-29 06:55:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:26,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:26,150 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 06:55:26,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:26,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207900972] [2023-11-29 06:55:26,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207900972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:26,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:55:26,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:55:26,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144804385] [2023-11-29 06:55:26,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:26,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:55:26,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:26,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:55:26,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:55:26,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2023-11-29 06:55:26,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 06:55:26,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:26,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2023-11-29 06:55:26,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:26,296 INFO L124 PetriNetUnfolderBase]: 194/441 cut-off events. [2023-11-29 06:55:26,296 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-29 06:55:26,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 837 conditions, 441 events. 194/441 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2206 event pairs, 172 based on Foata normal form. 14/360 useless extension candidates. Maximal degree in co-relation 735. Up to 316 conditions per place. [2023-11-29 06:55:26,301 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 24 selfloop transitions, 2 changer transitions 8/46 dead transitions. [2023-11-29 06:55:26,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 199 flow [2023-11-29 06:55:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:55:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:55:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2023-11-29 06:55:26,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-29 06:55:26,304 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 100 transitions. [2023-11-29 06:55:26,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 100 transitions. [2023-11-29 06:55:26,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:26,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 100 transitions. [2023-11-29 06:55:26,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.0) internal successors, (100), 4 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 06:55:26,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 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 06:55:26,306 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 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 06:55:26,306 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 114 flow. Second operand 4 states and 100 transitions. [2023-11-29 06:55:26,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 199 flow [2023-11-29 06:55:26,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 177 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-29 06:55:26,309 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2023-11-29 06:55:26,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-11-29 06:55:26,310 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-11-29 06:55:26,310 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2023-11-29 06:55:26,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 06:55:26,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:26,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-29 06:55:26,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 06:55:26,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:26,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:26,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1323318191, now seen corresponding path program 1 times [2023-11-29 06:55:26,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:26,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754385020] [2023-11-29 06:55:26,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:26,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:26,389 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 06:55:26,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:26,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754385020] [2023-11-29 06:55:26,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754385020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:26,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236958168] [2023-11-29 06:55:26,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:26,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:26,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:26,392 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:26,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:55:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:26,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:55:26,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:26,514 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 06:55:26,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:55:26,559 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 06:55:26,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236958168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:55:26,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:55:26,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 06:55:26,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322855594] [2023-11-29 06:55:26,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:55:26,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:55:26,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:26,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:55:26,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:55:26,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-29 06:55:26,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 12 states, 12 states have (on average 14.083333333333334) internal successors, (169), 12 states have internal predecessors, (169), 0 states have call successors, (0), 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 06:55:26,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:26,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-29 06:55:26,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:26,750 INFO L124 PetriNetUnfolderBase]: 184/417 cut-off events. [2023-11-29 06:55:26,751 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-11-29 06:55:26,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877 conditions, 417 events. 184/417 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2158 event pairs, 159 based on Foata normal form. 3/312 useless extension candidates. Maximal degree in co-relation 861. Up to 320 conditions per place. [2023-11-29 06:55:26,755 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 24 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2023-11-29 06:55:26,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 208 flow [2023-11-29 06:55:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:55:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:55:26,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2023-11-29 06:55:26,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37555555555555553 [2023-11-29 06:55:26,757 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 169 transitions. [2023-11-29 06:55:26,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 169 transitions. [2023-11-29 06:55:26,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:26,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 169 transitions. [2023-11-29 06:55:26,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 16.9) internal successors, (169), 10 states have internal predecessors, (169), 0 states have call successors, (0), 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 06:55:26,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 45.0) internal successors, (495), 11 states have internal predecessors, (495), 0 states have call successors, (0), 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 06:55:26,761 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 45.0) internal successors, (495), 11 states have internal predecessors, (495), 0 states have call successors, (0), 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 06:55:26,761 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 10 states and 169 transitions. [2023-11-29 06:55:26,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 208 flow [2023-11-29 06:55:26,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:55:26,764 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 174 flow [2023-11-29 06:55:26,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=174, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-11-29 06:55:26,765 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-11-29 06:55:26,765 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 174 flow [2023-11-29 06:55:26,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.083333333333334) internal successors, (169), 12 states have internal predecessors, (169), 0 states have call successors, (0), 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 06:55:26,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:26,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:26,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:55:26,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:26,969 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:26,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:26,969 INFO L85 PathProgramCache]: Analyzing trace with hash 400333756, now seen corresponding path program 1 times [2023-11-29 06:55:26,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:26,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65616433] [2023-11-29 06:55:26,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:26,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:27,107 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 06:55:27,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:27,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65616433] [2023-11-29 06:55:27,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65616433] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:27,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862958793] [2023-11-29 06:55:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:27,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:27,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:27,110 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:27,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:55:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:27,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:55:27,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:27,235 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 06:55:27,235 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:55:27,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862958793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:27,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:55:27,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-11-29 06:55:27,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995038237] [2023-11-29 06:55:27,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:27,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:55:27,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:27,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:55:27,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:55:27,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2023-11-29 06:55:27,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 06:55:27,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:27,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2023-11-29 06:55:27,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:27,304 INFO L124 PetriNetUnfolderBase]: 123/296 cut-off events. [2023-11-29 06:55:27,305 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-11-29 06:55:27,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 296 events. 123/296 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1364 event pairs, 102 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 579. Up to 223 conditions per place. [2023-11-29 06:55:27,307 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 31 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-29 06:55:27,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 44 transitions, 226 flow [2023-11-29 06:55:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:55:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:55:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2023-11-29 06:55:27,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-11-29 06:55:27,309 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 69 transitions. [2023-11-29 06:55:27,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 69 transitions. [2023-11-29 06:55:27,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:27,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 69 transitions. [2023-11-29 06:55:27,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 06:55:27,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 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 06:55:27,311 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 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 06:55:27,311 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 174 flow. Second operand 3 states and 69 transitions. [2023-11-29 06:55:27,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 44 transitions, 226 flow [2023-11-29 06:55:27,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 216 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 06:55:27,315 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 154 flow [2023-11-29 06:55:27,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-11-29 06:55:27,316 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2023-11-29 06:55:27,316 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 154 flow [2023-11-29 06:55:27,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 06:55:27,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:27,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:27,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:55:27,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:27,521 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:27,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:27,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1826298817, now seen corresponding path program 1 times [2023-11-29 06:55:27,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:27,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355104955] [2023-11-29 06:55:27,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:27,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:27,571 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 06:55:27,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:27,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355104955] [2023-11-29 06:55:27,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355104955] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:27,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:55:27,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:55:27,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755862096] [2023-11-29 06:55:27,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:27,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:55:27,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:27,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:55:27,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:55:27,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-29 06:55:27,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:27,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:27,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-29 06:55:27,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:27,697 INFO L124 PetriNetUnfolderBase]: 210/443 cut-off events. [2023-11-29 06:55:27,697 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-11-29 06:55:27,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 443 events. 210/443 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2061 event pairs, 132 based on Foata normal form. 12/413 useless extension candidates. Maximal degree in co-relation 925. Up to 290 conditions per place. [2023-11-29 06:55:27,701 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 48 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-11-29 06:55:27,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 304 flow [2023-11-29 06:55:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:55:27,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:55:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2023-11-29 06:55:27,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-29 06:55:27,703 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 95 transitions. [2023-11-29 06:55:27,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 95 transitions. [2023-11-29 06:55:27,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:27,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 95 transitions. [2023-11-29 06:55:27,704 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 06:55:27,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 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 06:55:27,705 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 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 06:55:27,705 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 154 flow. Second operand 4 states and 95 transitions. [2023-11-29 06:55:27,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 304 flow [2023-11-29 06:55:27,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:55:27,709 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 182 flow [2023-11-29 06:55:27,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-11-29 06:55:27,710 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2023-11-29 06:55:27,710 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 182 flow [2023-11-29 06:55:27,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:27,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:27,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:27,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 06:55:27,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:27,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:27,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1468406153, now seen corresponding path program 1 times [2023-11-29 06:55:27,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:27,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002698569] [2023-11-29 06:55:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:27,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:27,755 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 06:55:27,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:27,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002698569] [2023-11-29 06:55:27,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002698569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:27,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:55:27,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:55:27,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479505317] [2023-11-29 06:55:27,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:27,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:55:27,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:27,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:55:27,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:55:27,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2023-11-29 06:55:27,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 06:55:27,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:27,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2023-11-29 06:55:27,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:27,837 INFO L124 PetriNetUnfolderBase]: 169/411 cut-off events. [2023-11-29 06:55:27,837 INFO L125 PetriNetUnfolderBase]: For 143/146 co-relation queries the response was YES. [2023-11-29 06:55:27,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945 conditions, 411 events. 169/411 cut-off events. For 143/146 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1925 event pairs, 55 based on Foata normal form. 3/380 useless extension candidates. Maximal degree in co-relation 931. Up to 247 conditions per place. [2023-11-29 06:55:27,840 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 38 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-11-29 06:55:27,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 53 transitions, 282 flow [2023-11-29 06:55:27,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:55:27,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:55:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2023-11-29 06:55:27,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2023-11-29 06:55:27,842 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 74 transitions. [2023-11-29 06:55:27,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 74 transitions. [2023-11-29 06:55:27,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:27,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 74 transitions. [2023-11-29 06:55:27,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 06:55:27,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 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 06:55:27,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 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 06:55:27,844 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 182 flow. Second operand 3 states and 74 transitions. [2023-11-29 06:55:27,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 53 transitions, 282 flow [2023-11-29 06:55:27,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:55:27,847 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 202 flow [2023-11-29 06:55:27,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2023-11-29 06:55:27,848 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2023-11-29 06:55:27,849 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 202 flow [2023-11-29 06:55:27,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 06:55:27,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:27,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:27,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 06:55:27,850 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:27,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:27,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2044403078, now seen corresponding path program 1 times [2023-11-29 06:55:27,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:27,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739527045] [2023-11-29 06:55:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:27,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:28,331 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 06:55:28,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:28,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739527045] [2023-11-29 06:55:28,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739527045] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:28,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75835071] [2023-11-29 06:55:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:28,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:28,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:28,333 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:28,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:55:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:28,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 06:55:28,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:28,510 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 06:55:28,944 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:55:28,945 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 06:55:28,975 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 06:55:28,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:55:29,333 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 06:55:29,342 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 06:55:29,384 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 06:55:29,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75835071] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:55:29,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:55:29,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-29 06:55:29,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641833552] [2023-11-29 06:55:29,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:55:29,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:55:29,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:29,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:55:29,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:55:29,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2023-11-29 06:55:29,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 202 flow. Second operand has 23 states, 23 states have (on average 10.565217391304348) internal successors, (243), 23 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:29,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:29,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2023-11-29 06:55:29,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:33,265 INFO L124 PetriNetUnfolderBase]: 1179/2394 cut-off events. [2023-11-29 06:55:33,265 INFO L125 PetriNetUnfolderBase]: For 1533/1607 co-relation queries the response was YES. [2023-11-29 06:55:33,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6005 conditions, 2394 events. 1179/2394 cut-off events. For 1533/1607 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15404 event pairs, 101 based on Foata normal form. 2/2294 useless extension candidates. Maximal degree in co-relation 5989. Up to 437 conditions per place. [2023-11-29 06:55:33,279 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 252 selfloop transitions, 62 changer transitions 2/323 dead transitions. [2023-11-29 06:55:33,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 323 transitions, 1849 flow [2023-11-29 06:55:33,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 06:55:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-29 06:55:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 597 transitions. [2023-11-29 06:55:33,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.402020202020202 [2023-11-29 06:55:33,284 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 597 transitions. [2023-11-29 06:55:33,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 597 transitions. [2023-11-29 06:55:33,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:33,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 597 transitions. [2023-11-29 06:55:33,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 18.09090909090909) internal successors, (597), 33 states have internal predecessors, (597), 0 states have call successors, (0), 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 06:55:33,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 45.0) internal successors, (1530), 34 states have internal predecessors, (1530), 0 states have call successors, (0), 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 06:55:33,290 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 45.0) internal successors, (1530), 34 states have internal predecessors, (1530), 0 states have call successors, (0), 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 06:55:33,291 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 202 flow. Second operand 33 states and 597 transitions. [2023-11-29 06:55:33,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 323 transitions, 1849 flow [2023-11-29 06:55:33,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 323 transitions, 1706 flow, removed 66 selfloop flow, removed 2 redundant places. [2023-11-29 06:55:33,300 INFO L231 Difference]: Finished difference. Result has 102 places, 100 transitions, 631 flow [2023-11-29 06:55:33,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=631, PETRI_PLACES=102, PETRI_TRANSITIONS=100} [2023-11-29 06:55:33,301 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2023-11-29 06:55:33,301 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 100 transitions, 631 flow [2023-11-29 06:55:33,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.565217391304348) internal successors, (243), 23 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:33,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:33,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:33,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:55:33,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:33,503 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:33,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:33,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1637431754, now seen corresponding path program 2 times [2023-11-29 06:55:33,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:33,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533843819] [2023-11-29 06:55:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:33,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:33,953 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 06:55:33,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:33,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533843819] [2023-11-29 06:55:33,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533843819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:33,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802553003] [2023-11-29 06:55:33,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:55:33,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:33,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:33,955 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:33,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:55:34,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:55:34,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:55:34,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:55:34,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:34,164 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 06:55:34,165 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:55:34,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802553003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:34,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:55:34,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-29 06:55:34,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770847876] [2023-11-29 06:55:34,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:34,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:55:34,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:34,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:55:34,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:55:34,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-29 06:55:34,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 100 transitions, 631 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:34,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:34,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-29 06:55:34,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:34,815 INFO L124 PetriNetUnfolderBase]: 1509/3269 cut-off events. [2023-11-29 06:55:34,815 INFO L125 PetriNetUnfolderBase]: For 14641/14729 co-relation queries the response was YES. [2023-11-29 06:55:34,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11312 conditions, 3269 events. 1509/3269 cut-off events. For 14641/14729 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 24566 event pairs, 437 based on Foata normal form. 91/3301 useless extension candidates. Maximal degree in co-relation 11281. Up to 1677 conditions per place. [2023-11-29 06:55:34,880 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 129 selfloop transitions, 36 changer transitions 0/178 dead transitions. [2023-11-29 06:55:34,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 178 transitions, 1454 flow [2023-11-29 06:55:34,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:55:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 06:55:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2023-11-29 06:55:34,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2023-11-29 06:55:34,881 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 159 transitions. [2023-11-29 06:55:34,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 159 transitions. [2023-11-29 06:55:34,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:34,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 159 transitions. [2023-11-29 06:55:34,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 0 states have call successors, (0), 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 06:55:34,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 45.0) internal successors, (360), 8 states have internal predecessors, (360), 0 states have call successors, (0), 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 06:55:34,884 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 45.0) internal successors, (360), 8 states have internal predecessors, (360), 0 states have call successors, (0), 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 06:55:34,884 INFO L175 Difference]: Start difference. First operand has 102 places, 100 transitions, 631 flow. Second operand 7 states and 159 transitions. [2023-11-29 06:55:34,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 178 transitions, 1454 flow [2023-11-29 06:55:34,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 178 transitions, 1383 flow, removed 31 selfloop flow, removed 4 redundant places. [2023-11-29 06:55:34,939 INFO L231 Difference]: Finished difference. Result has 108 places, 123 transitions, 874 flow [2023-11-29 06:55:34,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=874, PETRI_PLACES=108, PETRI_TRANSITIONS=123} [2023-11-29 06:55:34,941 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2023-11-29 06:55:34,941 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 123 transitions, 874 flow [2023-11-29 06:55:34,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:34,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:34,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:34,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:55:35,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:35,144 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:35,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:35,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1767261298, now seen corresponding path program 1 times [2023-11-29 06:55:35,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:35,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182413178] [2023-11-29 06:55:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:35,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:35,520 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 06:55:35,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:35,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182413178] [2023-11-29 06:55:35,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182413178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:35,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678010453] [2023-11-29 06:55:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:35,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:35,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:35,522 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:35,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:55:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:35,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 06:55:35,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:35,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:55:35,868 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 06:55:35,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:55:36,285 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 06:55:36,295 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:55:36,296 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 06:55:36,365 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 06:55:36,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678010453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:55:36,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:55:36,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-29 06:55:36,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588329440] [2023-11-29 06:55:36,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:55:36,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:55:36,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:36,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:55:36,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:55:36,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 45 [2023-11-29 06:55:36,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 123 transitions, 874 flow. Second operand has 23 states, 23 states have (on average 9.695652173913043) internal successors, (223), 23 states have internal predecessors, (223), 0 states have call successors, (0), 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 06:55:36,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:36,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 45 [2023-11-29 06:55:36,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:38,233 INFO L124 PetriNetUnfolderBase]: 2641/5213 cut-off events. [2023-11-29 06:55:38,233 INFO L125 PetriNetUnfolderBase]: For 24759/24855 co-relation queries the response was YES. [2023-11-29 06:55:38,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19024 conditions, 5213 events. 2641/5213 cut-off events. For 24759/24855 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38876 event pairs, 322 based on Foata normal form. 90/5302 useless extension candidates. Maximal degree in co-relation 18988. Up to 1851 conditions per place. [2023-11-29 06:55:38,283 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 185 selfloop transitions, 99 changer transitions 45/335 dead transitions. [2023-11-29 06:55:38,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 335 transitions, 2658 flow [2023-11-29 06:55:38,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 06:55:38,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-29 06:55:38,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 461 transitions. [2023-11-29 06:55:38,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794238683127572 [2023-11-29 06:55:38,287 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 461 transitions. [2023-11-29 06:55:38,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 461 transitions. [2023-11-29 06:55:38,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:38,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 461 transitions. [2023-11-29 06:55:38,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 17.074074074074073) internal successors, (461), 27 states have internal predecessors, (461), 0 states have call successors, (0), 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 06:55:38,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 45.0) internal successors, (1260), 28 states have internal predecessors, (1260), 0 states have call successors, (0), 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 06:55:38,294 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 45.0) internal successors, (1260), 28 states have internal predecessors, (1260), 0 states have call successors, (0), 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 06:55:38,294 INFO L175 Difference]: Start difference. First operand has 108 places, 123 transitions, 874 flow. Second operand 27 states and 461 transitions. [2023-11-29 06:55:38,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 335 transitions, 2658 flow [2023-11-29 06:55:38,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 335 transitions, 2637 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:55:38,393 INFO L231 Difference]: Finished difference. Result has 145 places, 163 transitions, 1644 flow [2023-11-29 06:55:38,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1644, PETRI_PLACES=145, PETRI_TRANSITIONS=163} [2023-11-29 06:55:38,394 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 101 predicate places. [2023-11-29 06:55:38,395 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 163 transitions, 1644 flow [2023-11-29 06:55:38,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.695652173913043) internal successors, (223), 23 states have internal predecessors, (223), 0 states have call successors, (0), 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 06:55:38,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:38,395 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-29 06:55:38,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:55:38,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:55:38,601 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:38,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:38,601 INFO L85 PathProgramCache]: Analyzing trace with hash -867024141, now seen corresponding path program 2 times [2023-11-29 06:55:38,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:38,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116999227] [2023-11-29 06:55:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:38,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:38,739 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 06:55:38,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:38,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116999227] [2023-11-29 06:55:38,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116999227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:38,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557127110] [2023-11-29 06:55:38,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:55:38,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:38,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:38,741 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:38,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:55:38,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:55:38,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:55:38,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:55:38,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:38,855 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 06:55:38,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:55:38,879 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 06:55:38,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557127110] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:55:38,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:55:38,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-29 06:55:38,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575346474] [2023-11-29 06:55:38,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:55:38,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:55:38,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:38,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:55:38,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:55:38,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-29 06:55:38,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 163 transitions, 1644 flow. Second operand has 14 states, 14 states have (on average 14.142857142857142) internal successors, (198), 14 states have internal predecessors, (198), 0 states have call successors, (0), 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 06:55:38,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:38,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-29 06:55:38,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:39,580 INFO L124 PetriNetUnfolderBase]: 1692/3894 cut-off events. [2023-11-29 06:55:39,580 INFO L125 PetriNetUnfolderBase]: For 34371/34514 co-relation queries the response was YES. [2023-11-29 06:55:39,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17144 conditions, 3894 events. 1692/3894 cut-off events. For 34371/34514 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 31488 event pairs, 1038 based on Foata normal form. 2/3837 useless extension candidates. Maximal degree in co-relation 17095. Up to 2830 conditions per place. [2023-11-29 06:55:39,609 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 124 selfloop transitions, 18 changer transitions 0/165 dead transitions. [2023-11-29 06:55:39,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 165 transitions, 1946 flow [2023-11-29 06:55:39,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:55:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:55:39,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 219 transitions. [2023-11-29 06:55:39,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3476190476190476 [2023-11-29 06:55:39,611 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 219 transitions. [2023-11-29 06:55:39,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 219 transitions. [2023-11-29 06:55:39,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:39,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 219 transitions. [2023-11-29 06:55:39,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 15.642857142857142) internal successors, (219), 14 states have internal predecessors, (219), 0 states have call successors, (0), 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 06:55:39,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 45.0) internal successors, (675), 15 states have internal predecessors, (675), 0 states have call successors, (0), 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 06:55:39,613 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 45.0) internal successors, (675), 15 states have internal predecessors, (675), 0 states have call successors, (0), 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 06:55:39,613 INFO L175 Difference]: Start difference. First operand has 145 places, 163 transitions, 1644 flow. Second operand 14 states and 219 transitions. [2023-11-29 06:55:39,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 165 transitions, 1946 flow [2023-11-29 06:55:39,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 165 transitions, 1812 flow, removed 49 selfloop flow, removed 14 redundant places. [2023-11-29 06:55:39,761 INFO L231 Difference]: Finished difference. Result has 138 places, 165 transitions, 1564 flow [2023-11-29 06:55:39,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1564, PETRI_PLACES=138, PETRI_TRANSITIONS=165} [2023-11-29 06:55:39,762 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2023-11-29 06:55:39,762 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 165 transitions, 1564 flow [2023-11-29 06:55:39,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.142857142857142) internal successors, (198), 14 states have internal predecessors, (198), 0 states have call successors, (0), 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 06:55:39,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:39,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:39,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 06:55:39,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:55:39,963 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:39,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:39,964 INFO L85 PathProgramCache]: Analyzing trace with hash -889826746, now seen corresponding path program 1 times [2023-11-29 06:55:39,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:39,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277471594] [2023-11-29 06:55:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:39,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:40,412 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 06:55:40,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:40,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277471594] [2023-11-29 06:55:40,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277471594] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:40,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421956178] [2023-11-29 06:55:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:40,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:40,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:40,414 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:40,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:55:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:40,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 06:55:40,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:40,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-29 06:55:40,745 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 06:55:40,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:55:41,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2023-11-29 06:55:41,108 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:55:41,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2023-11-29 06:55:41,152 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 06:55:41,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421956178] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:55:41,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:55:41,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-29 06:55:41,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431092368] [2023-11-29 06:55:41,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:55:41,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:55:41,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:41,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:55:41,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:55:41,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2023-11-29 06:55:41,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 165 transitions, 1564 flow. Second operand has 23 states, 23 states have (on average 11.565217391304348) internal successors, (266), 23 states have internal predecessors, (266), 0 states have call successors, (0), 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 06:55:41,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:41,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2023-11-29 06:55:41,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:43,580 INFO L124 PetriNetUnfolderBase]: 3305/7165 cut-off events. [2023-11-29 06:55:43,580 INFO L125 PetriNetUnfolderBase]: For 61624/62037 co-relation queries the response was YES. [2023-11-29 06:55:43,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29653 conditions, 7165 events. 3305/7165 cut-off events. For 61624/62037 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 59397 event pairs, 297 based on Foata normal form. 260/7401 useless extension candidates. Maximal degree in co-relation 29609. Up to 1247 conditions per place. [2023-11-29 06:55:43,627 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 230 selfloop transitions, 157 changer transitions 4/411 dead transitions. [2023-11-29 06:55:43,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 411 transitions, 4243 flow [2023-11-29 06:55:43,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:55:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 06:55:43,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 524 transitions. [2023-11-29 06:55:43,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158730158730159 [2023-11-29 06:55:43,631 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 524 transitions. [2023-11-29 06:55:43,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 524 transitions. [2023-11-29 06:55:43,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:43,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 524 transitions. [2023-11-29 06:55:43,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 18.714285714285715) internal successors, (524), 28 states have internal predecessors, (524), 0 states have call successors, (0), 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 06:55:43,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 45.0) internal successors, (1305), 29 states have internal predecessors, (1305), 0 states have call successors, (0), 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 06:55:43,637 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 45.0) internal successors, (1305), 29 states have internal predecessors, (1305), 0 states have call successors, (0), 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 06:55:43,637 INFO L175 Difference]: Start difference. First operand has 138 places, 165 transitions, 1564 flow. Second operand 28 states and 524 transitions. [2023-11-29 06:55:43,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 411 transitions, 4243 flow [2023-11-29 06:55:43,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 411 transitions, 4099 flow, removed 36 selfloop flow, removed 14 redundant places. [2023-11-29 06:55:43,845 INFO L231 Difference]: Finished difference. Result has 162 places, 228 transitions, 2859 flow [2023-11-29 06:55:43,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2859, PETRI_PLACES=162, PETRI_TRANSITIONS=228} [2023-11-29 06:55:43,846 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 118 predicate places. [2023-11-29 06:55:43,846 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 228 transitions, 2859 flow [2023-11-29 06:55:43,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.565217391304348) internal successors, (266), 23 states have internal predecessors, (266), 0 states have call successors, (0), 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 06:55:43,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:43,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:43,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:55:44,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 06:55:44,047 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:44,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:44,047 INFO L85 PathProgramCache]: Analyzing trace with hash 284653638, now seen corresponding path program 1 times [2023-11-29 06:55:44,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:44,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126960361] [2023-11-29 06:55:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:44,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:44,474 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 06:55:44,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:44,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126960361] [2023-11-29 06:55:44,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126960361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:44,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679897764] [2023-11-29 06:55:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:44,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:44,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:44,476 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:44,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:55:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:44,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 06:55:44,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:44,612 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 06:55:44,934 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-29 06:55:44,934 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 06:55:44,962 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 06:55:44,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:55:45,224 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 18 treesize of output 16 [2023-11-29 06:55:45,228 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 22 treesize of output 16 [2023-11-29 06:55:45,266 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 06:55:45,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679897764] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:55:45,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:55:45,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-11-29 06:55:45,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433184637] [2023-11-29 06:55:45,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:55:45,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:55:45,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:45,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:55:45,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:55:45,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2023-11-29 06:55:45,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 228 transitions, 2859 flow. Second operand has 23 states, 23 states have (on average 11.695652173913043) internal successors, (269), 23 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:45,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:45,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2023-11-29 06:55:45,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:47,940 INFO L124 PetriNetUnfolderBase]: 3366/7309 cut-off events. [2023-11-29 06:55:47,940 INFO L125 PetriNetUnfolderBase]: For 105532/105988 co-relation queries the response was YES. [2023-11-29 06:55:47,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35845 conditions, 7309 events. 3366/7309 cut-off events. For 105532/105988 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 61223 event pairs, 766 based on Foata normal form. 40/7310 useless extension candidates. Maximal degree in co-relation 35790. Up to 4346 conditions per place. [2023-11-29 06:55:48,041 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 249 selfloop transitions, 72 changer transitions 0/341 dead transitions. [2023-11-29 06:55:48,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 341 transitions, 4403 flow [2023-11-29 06:55:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:55:48,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 06:55:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 328 transitions. [2023-11-29 06:55:48,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38362573099415204 [2023-11-29 06:55:48,044 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 328 transitions. [2023-11-29 06:55:48,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 328 transitions. [2023-11-29 06:55:48,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:48,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 328 transitions. [2023-11-29 06:55:48,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 17.263157894736842) internal successors, (328), 19 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 06:55:48,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 45.0) internal successors, (900), 20 states have internal predecessors, (900), 0 states have call successors, (0), 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 06:55:48,048 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 45.0) internal successors, (900), 20 states have internal predecessors, (900), 0 states have call successors, (0), 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 06:55:48,048 INFO L175 Difference]: Start difference. First operand has 162 places, 228 transitions, 2859 flow. Second operand 19 states and 328 transitions. [2023-11-29 06:55:48,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 341 transitions, 4403 flow [2023-11-29 06:55:48,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 341 transitions, 3995 flow, removed 189 selfloop flow, removed 8 redundant places. [2023-11-29 06:55:48,693 INFO L231 Difference]: Finished difference. Result has 174 places, 233 transitions, 2761 flow [2023-11-29 06:55:48,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2761, PETRI_PLACES=174, PETRI_TRANSITIONS=233} [2023-11-29 06:55:48,694 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2023-11-29 06:55:48,694 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 233 transitions, 2761 flow [2023-11-29 06:55:48,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.695652173913043) internal successors, (269), 23 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:48,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:48,695 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:48,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:55:48,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:55:48,896 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:48,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1620500969, now seen corresponding path program 1 times [2023-11-29 06:55:48,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:48,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642133815] [2023-11-29 06:55:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:48,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:55:48,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:48,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642133815] [2023-11-29 06:55:48,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642133815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:48,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143848520] [2023-11-29 06:55:48,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:48,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:48,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:48,991 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:48,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:55:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:49,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:55:49,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:49,157 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 06:55:49,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:55:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:55:49,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143848520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:55:49,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:55:49,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-29 06:55:49,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852209141] [2023-11-29 06:55:49,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:55:49,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 06:55:49,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:49,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 06:55:49,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:55:49,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-29 06:55:49,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 233 transitions, 2761 flow. Second operand has 15 states, 15 states have (on average 14.8) internal successors, (222), 15 states have internal predecessors, (222), 0 states have call successors, (0), 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 06:55:49,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:49,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-29 06:55:49,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:49,803 INFO L124 PetriNetUnfolderBase]: 1143/2736 cut-off events. [2023-11-29 06:55:49,803 INFO L125 PetriNetUnfolderBase]: For 37631/37696 co-relation queries the response was YES. [2023-11-29 06:55:49,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13772 conditions, 2736 events. 1143/2736 cut-off events. For 37631/37696 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 21298 event pairs, 701 based on Foata normal form. 108/2779 useless extension candidates. Maximal degree in co-relation 13722. Up to 1470 conditions per place. [2023-11-29 06:55:49,824 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 103 selfloop transitions, 17 changer transitions 1/142 dead transitions. [2023-11-29 06:55:49,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 142 transitions, 1666 flow [2023-11-29 06:55:49,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:55:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:55:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2023-11-29 06:55:49,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2023-11-29 06:55:49,825 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 154 transitions. [2023-11-29 06:55:49,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 154 transitions. [2023-11-29 06:55:49,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:49,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 154 transitions. [2023-11-29 06:55:49,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 19.25) internal successors, (154), 8 states have internal predecessors, (154), 0 states have call successors, (0), 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 06:55:49,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 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 06:55:49,827 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 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 06:55:49,827 INFO L175 Difference]: Start difference. First operand has 174 places, 233 transitions, 2761 flow. Second operand 8 states and 154 transitions. [2023-11-29 06:55:49,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 142 transitions, 1666 flow [2023-11-29 06:55:49,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 142 transitions, 1493 flow, removed 33 selfloop flow, removed 27 redundant places. [2023-11-29 06:55:49,926 INFO L231 Difference]: Finished difference. Result has 134 places, 126 transitions, 1230 flow [2023-11-29 06:55:49,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1230, PETRI_PLACES=134, PETRI_TRANSITIONS=126} [2023-11-29 06:55:49,927 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2023-11-29 06:55:49,927 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 126 transitions, 1230 flow [2023-11-29 06:55:49,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.8) internal successors, (222), 15 states have internal predecessors, (222), 0 states have call successors, (0), 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 06:55:49,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:49,927 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:49,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:55:50,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:50,128 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:50,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:50,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1374169474, now seen corresponding path program 3 times [2023-11-29 06:55:50,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:50,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180784445] [2023-11-29 06:55:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:50,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:55:50,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:50,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180784445] [2023-11-29 06:55:50,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180784445] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:50,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900453779] [2023-11-29 06:55:50,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:55:50,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:50,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:50,637 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:50,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:55:50,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 06:55:50,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:55:50,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:55:50,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:55:50,808 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:55:50,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900453779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:50,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:55:50,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2023-11-29 06:55:50,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258119425] [2023-11-29 06:55:50,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:50,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:55:50,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:50,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:55:50,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:55:50,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-29 06:55:50,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 126 transitions, 1230 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:50,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:50,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-29 06:55:50,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:51,398 INFO L124 PetriNetUnfolderBase]: 1332/3119 cut-off events. [2023-11-29 06:55:51,398 INFO L125 PetriNetUnfolderBase]: For 28749/28820 co-relation queries the response was YES. [2023-11-29 06:55:51,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14153 conditions, 3119 events. 1332/3119 cut-off events. For 28749/28820 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 24237 event pairs, 144 based on Foata normal form. 62/3172 useless extension candidates. Maximal degree in co-relation 14112. Up to 950 conditions per place. [2023-11-29 06:55:51,418 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 128 selfloop transitions, 46 changer transitions 0/191 dead transitions. [2023-11-29 06:55:51,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 191 transitions, 2115 flow [2023-11-29 06:55:51,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:55:51,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:55:51,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2023-11-29 06:55:51,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-29 06:55:51,420 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 190 transitions. [2023-11-29 06:55:51,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 190 transitions. [2023-11-29 06:55:51,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:51,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 190 transitions. [2023-11-29 06:55:51,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 0 states have call successors, (0), 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 06:55:51,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 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 06:55:51,422 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 45.0) internal successors, (405), 9 states have internal predecessors, (405), 0 states have call successors, (0), 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 06:55:51,422 INFO L175 Difference]: Start difference. First operand has 134 places, 126 transitions, 1230 flow. Second operand 8 states and 190 transitions. [2023-11-29 06:55:51,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 191 transitions, 2115 flow [2023-11-29 06:55:51,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 191 transitions, 2085 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 06:55:51,505 INFO L231 Difference]: Finished difference. Result has 138 places, 129 transitions, 1369 flow [2023-11-29 06:55:51,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1369, PETRI_PLACES=138, PETRI_TRANSITIONS=129} [2023-11-29 06:55:51,505 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2023-11-29 06:55:51,505 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 129 transitions, 1369 flow [2023-11-29 06:55:51,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:51,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:51,506 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:51,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:55:51,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:51,706 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:51,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:51,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1368269600, now seen corresponding path program 2 times [2023-11-29 06:55:51,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:51,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466668854] [2023-11-29 06:55:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:51,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:55:52,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:52,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466668854] [2023-11-29 06:55:52,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466668854] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:52,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129074062] [2023-11-29 06:55:52,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:55:52,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:52,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:52,415 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:52,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:55:52,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:55:52,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:55:52,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:55:52,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:55:52,631 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:55:52,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129074062] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:52,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:55:52,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2023-11-29 06:55:52,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966204317] [2023-11-29 06:55:52,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:52,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:55:52,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:52,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:55:52,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:55:52,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-29 06:55:52,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 129 transitions, 1369 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:52,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:52,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-29 06:55:52,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:53,219 INFO L124 PetriNetUnfolderBase]: 1412/3264 cut-off events. [2023-11-29 06:55:53,219 INFO L125 PetriNetUnfolderBase]: For 33546/33594 co-relation queries the response was YES. [2023-11-29 06:55:53,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15517 conditions, 3264 events. 1412/3264 cut-off events. For 33546/33594 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 25463 event pairs, 600 based on Foata normal form. 6/3227 useless extension candidates. Maximal degree in co-relation 15473. Up to 2175 conditions per place. [2023-11-29 06:55:53,241 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 101 selfloop transitions, 30 changer transitions 2/151 dead transitions. [2023-11-29 06:55:53,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 151 transitions, 1749 flow [2023-11-29 06:55:53,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:55:53,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:55:53,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2023-11-29 06:55:53,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-11-29 06:55:53,242 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 130 transitions. [2023-11-29 06:55:53,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 130 transitions. [2023-11-29 06:55:53,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:53,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 130 transitions. [2023-11-29 06:55:53,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:53,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 45.0) internal successors, (315), 7 states have internal predecessors, (315), 0 states have call successors, (0), 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 06:55:53,244 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 45.0) internal successors, (315), 7 states have internal predecessors, (315), 0 states have call successors, (0), 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 06:55:53,244 INFO L175 Difference]: Start difference. First operand has 138 places, 129 transitions, 1369 flow. Second operand 6 states and 130 transitions. [2023-11-29 06:55:53,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 151 transitions, 1749 flow [2023-11-29 06:55:53,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 151 transitions, 1674 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-11-29 06:55:53,350 INFO L231 Difference]: Finished difference. Result has 142 places, 133 transitions, 1439 flow [2023-11-29 06:55:53,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1439, PETRI_PLACES=142, PETRI_TRANSITIONS=133} [2023-11-29 06:55:53,351 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2023-11-29 06:55:53,351 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 133 transitions, 1439 flow [2023-11-29 06:55:53,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:53,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:53,352 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:53,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:55:53,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:55:53,552 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:53,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:53,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1389761115, now seen corresponding path program 2 times [2023-11-29 06:55:53,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:53,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942640698] [2023-11-29 06:55:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:53,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:55:53,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:53,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942640698] [2023-11-29 06:55:53,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942640698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:53,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789580745] [2023-11-29 06:55:53,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:55:53,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:53,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:53,618 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:53,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:55:53,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:55:53,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:55:53,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:55:53,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:55:53,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:55:53,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789580745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:53,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:55:53,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-29 06:55:53,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452471496] [2023-11-29 06:55:53,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:53,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:55:53,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:55:53,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:55:53,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2023-11-29 06:55:53,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 133 transitions, 1439 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:53,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:53,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2023-11-29 06:55:53,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:54,273 INFO L124 PetriNetUnfolderBase]: 1557/3311 cut-off events. [2023-11-29 06:55:54,273 INFO L125 PetriNetUnfolderBase]: For 34440/34530 co-relation queries the response was YES. [2023-11-29 06:55:54,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16266 conditions, 3311 events. 1557/3311 cut-off events. For 34440/34530 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 24846 event pairs, 436 based on Foata normal form. 111/3331 useless extension candidates. Maximal degree in co-relation 16220. Up to 1100 conditions per place. [2023-11-29 06:55:54,296 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 195 selfloop transitions, 7 changer transitions 1/220 dead transitions. [2023-11-29 06:55:54,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 220 transitions, 2967 flow [2023-11-29 06:55:54,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:55:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:55:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2023-11-29 06:55:54,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2023-11-29 06:55:54,297 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 86 transitions. [2023-11-29 06:55:54,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 86 transitions. [2023-11-29 06:55:54,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:54,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 86 transitions. [2023-11-29 06:55:54,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 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 06:55:54,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 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 06:55:54,297 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 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 06:55:54,297 INFO L175 Difference]: Start difference. First operand has 142 places, 133 transitions, 1439 flow. Second operand 4 states and 86 transitions. [2023-11-29 06:55:54,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 220 transitions, 2967 flow [2023-11-29 06:55:54,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 220 transitions, 2908 flow, removed 20 selfloop flow, removed 1 redundant places. [2023-11-29 06:55:54,385 INFO L231 Difference]: Finished difference. Result has 143 places, 132 transitions, 1398 flow [2023-11-29 06:55:54,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1398, PETRI_PLACES=143, PETRI_TRANSITIONS=132} [2023-11-29 06:55:54,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 99 predicate places. [2023-11-29 06:55:54,386 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 132 transitions, 1398 flow [2023-11-29 06:55:54,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:54,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:54,386 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:54,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:55:54,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:54,587 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:54,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:54,587 INFO L85 PathProgramCache]: Analyzing trace with hash -132921028, now seen corresponding path program 1 times [2023-11-29 06:55:54,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:54,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436327000] [2023-11-29 06:55:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:54,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:54,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:55:54,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:54,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436327000] [2023-11-29 06:55:54,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436327000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:54,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462675132] [2023-11-29 06:55:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:54,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:54,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:54,656 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:54,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:55:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:54,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:55:54,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:55:54,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:55:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:55:54,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462675132] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:55:54,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:55:54,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 06:55:54,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806576658] [2023-11-29 06:55:54,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:55:54,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:55:54,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:54,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:55:54,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:55:54,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-29 06:55:54,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 132 transitions, 1398 flow. Second operand has 12 states, 12 states have (on average 14.916666666666666) internal successors, (179), 12 states have internal predecessors, (179), 0 states have call successors, (0), 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 06:55:54,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:54,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-29 06:55:54,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:55,746 INFO L124 PetriNetUnfolderBase]: 2388/4997 cut-off events. [2023-11-29 06:55:55,746 INFO L125 PetriNetUnfolderBase]: For 66153/66469 co-relation queries the response was YES. [2023-11-29 06:55:55,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26053 conditions, 4997 events. 2388/4997 cut-off events. For 66153/66469 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 36262 event pairs, 475 based on Foata normal form. 298/5206 useless extension candidates. Maximal degree in co-relation 26006. Up to 2024 conditions per place. [2023-11-29 06:55:55,782 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 380 selfloop transitions, 13 changer transitions 0/411 dead transitions. [2023-11-29 06:55:55,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 411 transitions, 5640 flow [2023-11-29 06:55:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:55:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:55:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2023-11-29 06:55:55,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2023-11-29 06:55:55,783 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 227 transitions. [2023-11-29 06:55:55,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 227 transitions. [2023-11-29 06:55:55,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:55,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 227 transitions. [2023-11-29 06:55:55,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 22.7) internal successors, (227), 10 states have internal predecessors, (227), 0 states have call successors, (0), 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 06:55:55,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 45.0) internal successors, (495), 11 states have internal predecessors, (495), 0 states have call successors, (0), 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 06:55:55,785 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 45.0) internal successors, (495), 11 states have internal predecessors, (495), 0 states have call successors, (0), 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 06:55:55,785 INFO L175 Difference]: Start difference. First operand has 143 places, 132 transitions, 1398 flow. Second operand 10 states and 227 transitions. [2023-11-29 06:55:55,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 411 transitions, 5640 flow [2023-11-29 06:55:55,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 411 transitions, 5608 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:55:55,869 INFO L231 Difference]: Finished difference. Result has 152 places, 141 transitions, 1464 flow [2023-11-29 06:55:55,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1384, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1464, PETRI_PLACES=152, PETRI_TRANSITIONS=141} [2023-11-29 06:55:55,869 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2023-11-29 06:55:55,869 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 141 transitions, 1464 flow [2023-11-29 06:55:55,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.916666666666666) internal successors, (179), 12 states have internal predecessors, (179), 0 states have call successors, (0), 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 06:55:55,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:55,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:55,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:55:56,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:56,070 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:56,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:56,071 INFO L85 PathProgramCache]: Analyzing trace with hash 353082924, now seen corresponding path program 1 times [2023-11-29 06:55:56,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:56,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672825597] [2023-11-29 06:55:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:56,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:55:56,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:56,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672825597] [2023-11-29 06:55:56,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672825597] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:56,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630197492] [2023-11-29 06:55:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:56,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:56,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:56,163 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:56,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:55:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:56,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:55:56,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:55:56,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:55:56,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630197492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:56,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:55:56,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-29 06:55:56,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898634068] [2023-11-29 06:55:56,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:56,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:55:56,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:56,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:55:56,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:55:56,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2023-11-29 06:55:56,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 141 transitions, 1464 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 06:55:56,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:56,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2023-11-29 06:55:56,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:57,325 INFO L124 PetriNetUnfolderBase]: 2729/6081 cut-off events. [2023-11-29 06:55:57,325 INFO L125 PetriNetUnfolderBase]: For 87162/87342 co-relation queries the response was YES. [2023-11-29 06:55:57,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32847 conditions, 6081 events. 2729/6081 cut-off events. For 87162/87342 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 46199 event pairs, 574 based on Foata normal form. 144/6171 useless extension candidates. Maximal degree in co-relation 32797. Up to 2682 conditions per place. [2023-11-29 06:55:57,371 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 123 selfloop transitions, 32 changer transitions 28/194 dead transitions. [2023-11-29 06:55:57,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 194 transitions, 2297 flow [2023-11-29 06:55:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:55:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:55:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2023-11-29 06:55:57,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2023-11-29 06:55:57,372 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 111 transitions. [2023-11-29 06:55:57,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 111 transitions. [2023-11-29 06:55:57,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:57,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 111 transitions. [2023-11-29 06:55:57,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 06:55:57,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 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 06:55:57,373 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 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 06:55:57,373 INFO L175 Difference]: Start difference. First operand has 152 places, 141 transitions, 1464 flow. Second operand 4 states and 111 transitions. [2023-11-29 06:55:57,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 194 transitions, 2297 flow [2023-11-29 06:55:57,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 194 transitions, 2149 flow, removed 54 selfloop flow, removed 11 redundant places. [2023-11-29 06:55:57,521 INFO L231 Difference]: Finished difference. Result has 143 places, 116 transitions, 1331 flow [2023-11-29 06:55:57,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1331, PETRI_PLACES=143, PETRI_TRANSITIONS=116} [2023-11-29 06:55:57,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 99 predicate places. [2023-11-29 06:55:57,521 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 116 transitions, 1331 flow [2023-11-29 06:55:57,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 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 06:55:57,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:57,522 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:57,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 06:55:57,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:57,722 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:55:57,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:57,722 INFO L85 PathProgramCache]: Analyzing trace with hash -220268714, now seen corresponding path program 2 times [2023-11-29 06:55:57,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:57,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282596391] [2023-11-29 06:55:57,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:57,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:58,724 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 06:55:58,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:58,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282596391] [2023-11-29 06:55:58,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282596391] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:55:58,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908157014] [2023-11-29 06:55:58,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:55:58,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:58,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:58,726 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:58,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:55:58,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:55:58,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:55:58,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:55:58,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:58,921 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 06:55:58,921 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:55:58,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908157014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:58,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:55:58,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 15 [2023-11-29 06:55:58,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182694690] [2023-11-29 06:55:58,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:58,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:55:58,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:58,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:55:58,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:55:58,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-29 06:55:58,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 116 transitions, 1331 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:58,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:58,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-29 06:55:58,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:59,783 INFO L124 PetriNetUnfolderBase]: 2854/6020 cut-off events. [2023-11-29 06:55:59,783 INFO L125 PetriNetUnfolderBase]: For 76162/76384 co-relation queries the response was YES. [2023-11-29 06:55:59,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31097 conditions, 6020 events. 2854/6020 cut-off events. For 76162/76384 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 43841 event pairs, 1154 based on Foata normal form. 76/6054 useless extension candidates. Maximal degree in co-relation 31050. Up to 4470 conditions per place. [2023-11-29 06:55:59,828 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 101 selfloop transitions, 12 changer transitions 8/130 dead transitions. [2023-11-29 06:55:59,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 130 transitions, 1616 flow [2023-11-29 06:55:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:55:59,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:55:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2023-11-29 06:55:59,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2023-11-29 06:55:59,830 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 111 transitions. [2023-11-29 06:55:59,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 111 transitions. [2023-11-29 06:55:59,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:59,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 111 transitions. [2023-11-29 06:55:59,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 0 states have call successors, (0), 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 06:55:59,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 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 06:55:59,831 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 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 06:55:59,831 INFO L175 Difference]: Start difference. First operand has 143 places, 116 transitions, 1331 flow. Second operand 5 states and 111 transitions. [2023-11-29 06:55:59,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 130 transitions, 1616 flow [2023-11-29 06:55:59,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 130 transitions, 1421 flow, removed 71 selfloop flow, removed 15 redundant places. [2023-11-29 06:55:59,949 INFO L231 Difference]: Finished difference. Result has 115 places, 112 transitions, 1127 flow [2023-11-29 06:55:59,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1127, PETRI_PLACES=115, PETRI_TRANSITIONS=112} [2023-11-29 06:55:59,949 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2023-11-29 06:55:59,949 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 112 transitions, 1127 flow [2023-11-29 06:55:59,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:55:59,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:59,950 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:59,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:56:00,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:56:00,150 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:56:00,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:56:00,151 INFO L85 PathProgramCache]: Analyzing trace with hash 152614662, now seen corresponding path program 4 times [2023-11-29 06:56:00,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:56:00,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921663417] [2023-11-29 06:56:00,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:56:00,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:56:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:56:01,070 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 06:56:01,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:56:01,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921663417] [2023-11-29 06:56:01,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921663417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:56:01,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553313977] [2023-11-29 06:56:01,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:56:01,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:56:01,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:56:01,072 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:56:01,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:56:01,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:56:01,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:56:01,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:56:01,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:56:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:56:01,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:56:01,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:56:01,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-11-29 06:56:01,518 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 06:56:01,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553313977] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:56:01,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:56:01,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11, 8] total 22 [2023-11-29 06:56:01,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464601817] [2023-11-29 06:56:01,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:56:01,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:56:01,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:56:01,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:56:01,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2023-11-29 06:56:01,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2023-11-29 06:56:01,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 112 transitions, 1127 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:56:01,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:56:01,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2023-11-29 06:56:01,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:56:02,425 INFO L124 PetriNetUnfolderBase]: 3511/6858 cut-off events. [2023-11-29 06:56:02,425 INFO L125 PetriNetUnfolderBase]: For 35843/35867 co-relation queries the response was YES. [2023-11-29 06:56:02,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28236 conditions, 6858 events. 3511/6858 cut-off events. For 35843/35867 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 48181 event pairs, 467 based on Foata normal form. 52/6879 useless extension candidates. Maximal degree in co-relation 28199. Up to 2967 conditions per place. [2023-11-29 06:56:02,478 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 127 selfloop transitions, 28 changer transitions 0/162 dead transitions. [2023-11-29 06:56:02,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 162 transitions, 1722 flow [2023-11-29 06:56:02,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:56:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:56:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2023-11-29 06:56:02,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49777777777777776 [2023-11-29 06:56:02,479 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 112 transitions. [2023-11-29 06:56:02,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 112 transitions. [2023-11-29 06:56:02,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:56:02,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 112 transitions. [2023-11-29 06:56:02,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 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 06:56:02,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 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 06:56:02,480 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 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 06:56:02,480 INFO L175 Difference]: Start difference. First operand has 115 places, 112 transitions, 1127 flow. Second operand 5 states and 112 transitions. [2023-11-29 06:56:02,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 162 transitions, 1722 flow [2023-11-29 06:56:02,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 162 transitions, 1674 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-29 06:56:02,612 INFO L231 Difference]: Finished difference. Result has 113 places, 114 transitions, 1179 flow [2023-11-29 06:56:02,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1079, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1179, PETRI_PLACES=113, PETRI_TRANSITIONS=114} [2023-11-29 06:56:02,613 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2023-11-29 06:56:02,613 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 114 transitions, 1179 flow [2023-11-29 06:56:02,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:56:02,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:56:02,613 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:56:02,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:56:02,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:56:02,814 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:56:02,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:56:02,814 INFO L85 PathProgramCache]: Analyzing trace with hash 10672334, now seen corresponding path program 2 times [2023-11-29 06:56:02,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:56:02,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485745649] [2023-11-29 06:56:02,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:56:02,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:56:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:56:03,668 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 06:56:03,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:56:03,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485745649] [2023-11-29 06:56:03,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485745649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:56:03,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707196634] [2023-11-29 06:56:03,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:56:03,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:56:03,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:56:03,670 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:56:03,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:56:03,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:56:03,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:56:03,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:56:03,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:56:03,837 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 06:56:03,837 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:56:03,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707196634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:56:03,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:56:03,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 15 [2023-11-29 06:56:03,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611714260] [2023-11-29 06:56:03,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:56:03,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:56:03,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:56:03,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:56:03,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:56:03,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-29 06:56:03,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 114 transitions, 1179 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 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 06:56:03,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:56:03,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-29 06:56:03,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:56:04,564 INFO L124 PetriNetUnfolderBase]: 2760/5889 cut-off events. [2023-11-29 06:56:04,564 INFO L125 PetriNetUnfolderBase]: For 39369/39631 co-relation queries the response was YES. [2023-11-29 06:56:04,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25770 conditions, 5889 events. 2760/5889 cut-off events. For 39369/39631 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 43098 event pairs, 631 based on Foata normal form. 344/6198 useless extension candidates. Maximal degree in co-relation 25735. Up to 1896 conditions per place. [2023-11-29 06:56:04,607 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 118 selfloop transitions, 34 changer transitions 0/163 dead transitions. [2023-11-29 06:56:04,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 163 transitions, 1770 flow [2023-11-29 06:56:04,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:56:04,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:56:04,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2023-11-29 06:56:04,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5155555555555555 [2023-11-29 06:56:04,608 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 116 transitions. [2023-11-29 06:56:04,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 116 transitions. [2023-11-29 06:56:04,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:56:04,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 116 transitions. [2023-11-29 06:56:04,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 0 states have call successors, (0), 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 06:56:04,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 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 06:56:04,610 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 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 06:56:04,610 INFO L175 Difference]: Start difference. First operand has 113 places, 114 transitions, 1179 flow. Second operand 5 states and 116 transitions. [2023-11-29 06:56:04,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 163 transitions, 1770 flow [2023-11-29 06:56:04,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 163 transitions, 1728 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:56:04,689 INFO L231 Difference]: Finished difference. Result has 115 places, 115 transitions, 1246 flow [2023-11-29 06:56:04,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1246, PETRI_PLACES=115, PETRI_TRANSITIONS=115} [2023-11-29 06:56:04,690 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2023-11-29 06:56:04,690 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 115 transitions, 1246 flow [2023-11-29 06:56:04,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 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 06:56:04,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:56:04,691 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:56:04,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 06:56:04,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:56:04,891 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:56:04,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:56:04,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1761605046, now seen corresponding path program 3 times [2023-11-29 06:56:04,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:56:04,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806963989] [2023-11-29 06:56:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:56:04,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:56:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:56:05,545 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 06:56:05,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:56:05,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806963989] [2023-11-29 06:56:05,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806963989] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:56:05,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324412578] [2023-11-29 06:56:05,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:56:05,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:56:05,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:56:05,546 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:56:05,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:56:05,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-29 06:56:05,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:56:05,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:56:05,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:56:05,740 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 06:56:05,740 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:56:05,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324412578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:56:05,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:56:05,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 15 [2023-11-29 06:56:05,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819848617] [2023-11-29 06:56:05,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:56:05,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:56:05,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:56:05,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:56:05,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:56:05,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2023-11-29 06:56:05,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 115 transitions, 1246 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:56:05,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:56:05,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2023-11-29 06:56:05,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:56:06,501 INFO L124 PetriNetUnfolderBase]: 2755/5720 cut-off events. [2023-11-29 06:56:06,502 INFO L125 PetriNetUnfolderBase]: For 44729/45032 co-relation queries the response was YES. [2023-11-29 06:56:06,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26402 conditions, 5720 events. 2755/5720 cut-off events. For 44729/45032 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 40926 event pairs, 1117 based on Foata normal form. 128/5796 useless extension candidates. Maximal degree in co-relation 26365. Up to 4365 conditions per place. [2023-11-29 06:56:06,547 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 93 selfloop transitions, 8 changer transitions 16/128 dead transitions. [2023-11-29 06:56:06,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 128 transitions, 1522 flow [2023-11-29 06:56:06,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:56:06,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:56:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2023-11-29 06:56:06,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-11-29 06:56:06,548 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 108 transitions. [2023-11-29 06:56:06,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 108 transitions. [2023-11-29 06:56:06,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:56:06,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 108 transitions. [2023-11-29 06:56:06,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.6) internal successors, (108), 5 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 06:56:06,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 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 06:56:06,549 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 0 states have call successors, (0), 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 06:56:06,550 INFO L175 Difference]: Start difference. First operand has 115 places, 115 transitions, 1246 flow. Second operand 5 states and 108 transitions. [2023-11-29 06:56:06,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 128 transitions, 1522 flow [2023-11-29 06:56:06,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 128 transitions, 1478 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:56:06,647 INFO L231 Difference]: Finished difference. Result has 117 places, 110 transitions, 1151 flow [2023-11-29 06:56:06,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1151, PETRI_PLACES=117, PETRI_TRANSITIONS=110} [2023-11-29 06:56:06,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2023-11-29 06:56:06,647 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 110 transitions, 1151 flow [2023-11-29 06:56:06,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:56:06,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:56:06,648 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:56:06,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:56:06,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:56:06,848 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:56:06,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:56:06,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1917568324, now seen corresponding path program 1 times [2023-11-29 06:56:06,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:56:06,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517336351] [2023-11-29 06:56:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:56:06,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:56:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:56:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:56:07,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:56:07,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517336351] [2023-11-29 06:56:07,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517336351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:56:07,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781168669] [2023-11-29 06:56:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:56:07,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:56:07,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:56:07,550 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:56:07,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:56:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:56:07,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:56:07,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:56:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:56:07,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:56:08,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:56:08,100 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 52 [2023-11-29 06:56:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:56:08,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781168669] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:56:08,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:56:08,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 28 [2023-11-29 06:56:08,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298019743] [2023-11-29 06:56:08,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:56:08,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 06:56:08,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:56:08,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 06:56:08,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2023-11-29 06:56:08,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2023-11-29 06:56:08,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 110 transitions, 1151 flow. Second operand has 30 states, 30 states have (on average 10.733333333333333) internal successors, (322), 30 states have internal predecessors, (322), 0 states have call successors, (0), 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 06:56:08,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:56:08,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2023-11-29 06:56:08,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:56:15,007 INFO L124 PetriNetUnfolderBase]: 9423/18818 cut-off events. [2023-11-29 06:56:15,008 INFO L125 PetriNetUnfolderBase]: For 129221/129675 co-relation queries the response was YES. [2023-11-29 06:56:15,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80444 conditions, 18818 events. 9423/18818 cut-off events. For 129221/129675 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 159939 event pairs, 535 based on Foata normal form. 1018/19825 useless extension candidates. Maximal degree in co-relation 80406. Up to 3083 conditions per place. [2023-11-29 06:56:15,153 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 758 selfloop transitions, 256 changer transitions 51/1071 dead transitions. [2023-11-29 06:56:15,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 1071 transitions, 10090 flow [2023-11-29 06:56:15,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-29 06:56:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-11-29 06:56:15,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 1350 transitions. [2023-11-29 06:56:15,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-29 06:56:15,157 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 1350 transitions. [2023-11-29 06:56:15,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 1350 transitions. [2023-11-29 06:56:15,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:56:15,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 1350 transitions. [2023-11-29 06:56:15,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 18.0) internal successors, (1350), 75 states have internal predecessors, (1350), 0 states have call successors, (0), 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 06:56:15,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 45.0) internal successors, (3420), 76 states have internal predecessors, (3420), 0 states have call successors, (0), 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 06:56:15,166 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 45.0) internal successors, (3420), 76 states have internal predecessors, (3420), 0 states have call successors, (0), 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 06:56:15,166 INFO L175 Difference]: Start difference. First operand has 117 places, 110 transitions, 1151 flow. Second operand 75 states and 1350 transitions. [2023-11-29 06:56:15,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 1071 transitions, 10090 flow [2023-11-29 06:56:15,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 1071 transitions, 9964 flow, removed 51 selfloop flow, removed 6 redundant places. [2023-11-29 06:56:15,564 INFO L231 Difference]: Finished difference. Result has 226 places, 356 transitions, 5512 flow [2023-11-29 06:56:15,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=5512, PETRI_PLACES=226, PETRI_TRANSITIONS=356} [2023-11-29 06:56:15,565 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2023-11-29 06:56:15,565 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 356 transitions, 5512 flow [2023-11-29 06:56:15,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 10.733333333333333) internal successors, (322), 30 states have internal predecessors, (322), 0 states have call successors, (0), 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 06:56:15,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:56:15,565 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:56:15,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-29 06:56:15,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 06:56:15,766 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:56:15,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:56:15,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1670828956, now seen corresponding path program 2 times [2023-11-29 06:56:15,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:56:15,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594908232] [2023-11-29 06:56:15,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:56:15,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:56:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:56:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:56:16,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:56:16,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594908232] [2023-11-29 06:56:16,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594908232] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:56:16,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099291352] [2023-11-29 06:56:16,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:56:16,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:56:16,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:56:16,388 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:56:16,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:56:16,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:56:16,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:56:16,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 06:56:16,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:56:16,587 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 06:56:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:56:17,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:56:18,102 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 76 treesize of output 68 [2023-11-29 06:56:18,138 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-11-29 06:56:18,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 121 [2023-11-29 06:56:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:56:18,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099291352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:56:18,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:56:18,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2023-11-29 06:56:18,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188893183] [2023-11-29 06:56:18,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:56:18,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 06:56:18,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:56:18,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 06:56:18,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1282, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 06:56:19,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2023-11-29 06:56:19,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 356 transitions, 5512 flow. Second operand has 39 states, 39 states have (on average 10.564102564102564) internal successors, (412), 39 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:56:19,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:56:19,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2023-11-29 06:56:19,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:56:30,248 INFO L124 PetriNetUnfolderBase]: 11925/23666 cut-off events. [2023-11-29 06:56:30,248 INFO L125 PetriNetUnfolderBase]: For 613674/614358 co-relation queries the response was YES. [2023-11-29 06:56:30,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136243 conditions, 23666 events. 11925/23666 cut-off events. For 613674/614358 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 209624 event pairs, 2608 based on Foata normal form. 492/24072 useless extension candidates. Maximal degree in co-relation 136164. Up to 6461 conditions per place. [2023-11-29 06:56:30,566 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 680 selfloop transitions, 327 changer transitions 12/1025 dead transitions. [2023-11-29 06:56:30,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 1025 transitions, 14264 flow [2023-11-29 06:56:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 06:56:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-29 06:56:30,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 842 transitions. [2023-11-29 06:56:30,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38981481481481484 [2023-11-29 06:56:30,569 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 842 transitions. [2023-11-29 06:56:30,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 842 transitions. [2023-11-29 06:56:30,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:56:30,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 842 transitions. [2023-11-29 06:56:30,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 17.541666666666668) internal successors, (842), 48 states have internal predecessors, (842), 0 states have call successors, (0), 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 06:56:30,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 45.0) internal successors, (2205), 49 states have internal predecessors, (2205), 0 states have call successors, (0), 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 06:56:30,574 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 45.0) internal successors, (2205), 49 states have internal predecessors, (2205), 0 states have call successors, (0), 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 06:56:30,575 INFO L175 Difference]: Start difference. First operand has 226 places, 356 transitions, 5512 flow. Second operand 48 states and 842 transitions. [2023-11-29 06:56:30,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 1025 transitions, 14264 flow [2023-11-29 06:56:33,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 1025 transitions, 12674 flow, removed 787 selfloop flow, removed 8 redundant places. [2023-11-29 06:56:33,142 INFO L231 Difference]: Finished difference. Result has 287 places, 540 transitions, 9247 flow [2023-11-29 06:56:33,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=4482, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=9247, PETRI_PLACES=287, PETRI_TRANSITIONS=540} [2023-11-29 06:56:33,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2023-11-29 06:56:33,143 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 540 transitions, 9247 flow [2023-11-29 06:56:33,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 10.564102564102564) internal successors, (412), 39 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:56:33,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:56:33,143 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:56:33,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 06:56:33,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 06:56:33,344 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:56:33,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:56:33,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1625021384, now seen corresponding path program 3 times [2023-11-29 06:56:33,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:56:33,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044136123] [2023-11-29 06:56:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:56:33,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:56:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:56:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:56:34,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:56:34,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044136123] [2023-11-29 06:56:34,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044136123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:56:34,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296809177] [2023-11-29 06:56:34,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:56:34,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:56:34,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:56:34,010 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:56:34,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:56:34,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 06:56:34,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:56:34,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:56:34,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:56:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:56:34,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:56:34,843 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-11-29 06:56:34,843 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 102 treesize of output 57 [2023-11-29 06:56:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:56:34,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296809177] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:56:34,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:56:34,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 28 [2023-11-29 06:56:34,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44907974] [2023-11-29 06:56:34,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:56:34,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 06:56:34,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:56:34,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 06:56:34,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2023-11-29 06:56:34,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 45 [2023-11-29 06:56:34,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 540 transitions, 9247 flow. Second operand has 30 states, 30 states have (on average 9.7) internal successors, (291), 30 states have internal predecessors, (291), 0 states have call successors, (0), 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 06:56:34,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:56:34,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 45 [2023-11-29 06:56:34,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:57:00,222 INFO L124 PetriNetUnfolderBase]: 26361/50765 cut-off events. [2023-11-29 06:57:00,222 INFO L125 PetriNetUnfolderBase]: For 1724800/1725268 co-relation queries the response was YES. [2023-11-29 06:57:00,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290529 conditions, 50765 events. 26361/50765 cut-off events. For 1724800/1725268 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 475373 event pairs, 1243 based on Foata normal form. 1112/51876 useless extension candidates. Maximal degree in co-relation 290428. Up to 8112 conditions per place. [2023-11-29 06:57:01,202 INFO L140 encePairwiseOnDemand]: 31/45 looper letters, 1535 selfloop transitions, 1088 changer transitions 144/2772 dead transitions. [2023-11-29 06:57:01,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 2772 transitions, 46001 flow [2023-11-29 06:57:01,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-11-29 06:57:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2023-11-29 06:57:01,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 2188 transitions. [2023-11-29 06:57:01,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39854280510018214 [2023-11-29 06:57:01,210 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 2188 transitions. [2023-11-29 06:57:01,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 2188 transitions. [2023-11-29 06:57:01,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:57:01,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 2188 transitions. [2023-11-29 06:57:01,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 17.934426229508198) internal successors, (2188), 122 states have internal predecessors, (2188), 0 states have call successors, (0), 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 06:57:01,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 45.0) internal successors, (5535), 123 states have internal predecessors, (5535), 0 states have call successors, (0), 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 06:57:01,232 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 45.0) internal successors, (5535), 123 states have internal predecessors, (5535), 0 states have call successors, (0), 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 06:57:01,232 INFO L175 Difference]: Start difference. First operand has 287 places, 540 transitions, 9247 flow. Second operand 122 states and 2188 transitions. [2023-11-29 06:57:01,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 2772 transitions, 46001 flow [2023-11-29 06:57:16,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 2772 transitions, 36181 flow, removed 4845 selfloop flow, removed 16 redundant places. [2023-11-29 06:57:16,580 INFO L231 Difference]: Finished difference. Result has 464 places, 1318 transitions, 25359 flow [2023-11-29 06:57:16,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=7629, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=25359, PETRI_PLACES=464, PETRI_TRANSITIONS=1318} [2023-11-29 06:57:16,582 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 420 predicate places. [2023-11-29 06:57:16,582 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 1318 transitions, 25359 flow [2023-11-29 06:57:16,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.7) internal successors, (291), 30 states have internal predecessors, (291), 0 states have call successors, (0), 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 06:57:16,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:57:16,582 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:57:16,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:57:16,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 06:57:16,783 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:57:16,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:57:16,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1416445060, now seen corresponding path program 4 times [2023-11-29 06:57:16,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:57:16,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110927696] [2023-11-29 06:57:16,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:57:16,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:57:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:57:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:57:17,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:57:17,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110927696] [2023-11-29 06:57:17,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110927696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:57:17,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385011434] [2023-11-29 06:57:17,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 06:57:17,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:57:17,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:57:17,280 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:57:17,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:57:17,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 06:57:17,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:57:17,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:57:17,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:57:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:57:17,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:57:17,826 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-11-29 06:57:17,826 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 49 treesize of output 38 [2023-11-29 06:57:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:57:17,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385011434] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:57:17,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:57:17,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 27 [2023-11-29 06:57:17,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243969001] [2023-11-29 06:57:17,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:57:17,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 06:57:17,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:57:17,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 06:57:17,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2023-11-29 06:57:17,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 45 [2023-11-29 06:57:17,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 1318 transitions, 25359 flow. Second operand has 29 states, 29 states have (on average 10.758620689655173) internal successors, (312), 29 states have internal predecessors, (312), 0 states have call successors, (0), 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 06:57:17,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:57:17,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 45 [2023-11-29 06:57:17,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:57:57,492 INFO L124 PetriNetUnfolderBase]: 31882/66123 cut-off events. [2023-11-29 06:57:57,492 INFO L125 PetriNetUnfolderBase]: For 2921119/2923439 co-relation queries the response was YES. [2023-11-29 06:57:58,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433795 conditions, 66123 events. 31882/66123 cut-off events. For 2921119/2923439 co-relation queries the response was YES. Maximal size of possible extension queue 1263. Compared 666501 event pairs, 2918 based on Foata normal form. 2382/68273 useless extension candidates. Maximal degree in co-relation 433630. Up to 9953 conditions per place. [2023-11-29 06:57:59,119 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 2128 selfloop transitions, 1267 changer transitions 48/3459 dead transitions. [2023-11-29 06:57:59,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 3459 transitions, 66289 flow [2023-11-29 06:57:59,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-29 06:57:59,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-11-29 06:57:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 1479 transitions. [2023-11-29 06:57:59,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39126984126984127 [2023-11-29 06:57:59,122 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 1479 transitions. [2023-11-29 06:57:59,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 1479 transitions. [2023-11-29 06:57:59,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:57:59,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 1479 transitions. [2023-11-29 06:57:59,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 17.607142857142858) internal successors, (1479), 84 states have internal predecessors, (1479), 0 states have call successors, (0), 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 06:57:59,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 45.0) internal successors, (3825), 85 states have internal predecessors, (3825), 0 states have call successors, (0), 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 06:57:59,131 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 45.0) internal successors, (3825), 85 states have internal predecessors, (3825), 0 states have call successors, (0), 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 06:57:59,131 INFO L175 Difference]: Start difference. First operand has 464 places, 1318 transitions, 25359 flow. Second operand 84 states and 1479 transitions. [2023-11-29 06:57:59,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 3459 transitions, 66289 flow [2023-11-29 06:58:29,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 3459 transitions, 55985 flow, removed 5073 selfloop flow, removed 13 redundant places. [2023-11-29 06:58:29,952 INFO L231 Difference]: Finished difference. Result has 553 places, 1940 transitions, 36734 flow [2023-11-29 06:58:29,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=20414, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=36734, PETRI_PLACES=553, PETRI_TRANSITIONS=1940} [2023-11-29 06:58:29,954 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 509 predicate places. [2023-11-29 06:58:29,954 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 1940 transitions, 36734 flow [2023-11-29 06:58:29,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 10.758620689655173) internal successors, (312), 29 states have internal predecessors, (312), 0 states have call successors, (0), 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 06:58:29,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:58:29,954 INFO L208 CegarLoopForPetriNet]: trace histogram [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 06:58:29,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 06:58:30,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 06:58:30,155 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 06:58:30,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:58:30,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2012547460, now seen corresponding path program 1 times [2023-11-29 06:58:30,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:58:30,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196432930] [2023-11-29 06:58:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:30,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:58:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:30,782 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 06:58:30,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:58:30,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196432930] [2023-11-29 06:58:30,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196432930] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:58:30,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388446687] [2023-11-29 06:58:30,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:58:30,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:58:30,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:58:30,783 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:58:30,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:58:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:58:30,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:58:30,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:58:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:58:31,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:58:31,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 06:58:31,308 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 52 [2023-11-29 06:58:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 06:58:31,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388446687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:58:31,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 06:58:31,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 28 [2023-11-29 06:58:31,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842401129] [2023-11-29 06:58:31,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 06:58:31,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 06:58:31,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:58:31,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 06:58:31,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2023-11-29 06:58:31,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 45 [2023-11-29 06:58:31,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 1940 transitions, 36734 flow. Second operand has 30 states, 30 states have (on average 9.9) internal successors, (297), 30 states have internal predecessors, (297), 0 states have call successors, (0), 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 06:58:31,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:58:31,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 45 [2023-11-29 06:58:31,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:59:32,299 INFO L124 PetriNetUnfolderBase]: 41978/82405 cut-off events. [2023-11-29 06:59:32,299 INFO L125 PetriNetUnfolderBase]: For 2582413/2583043 co-relation queries the response was YES. [2023-11-29 06:59:34,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556894 conditions, 82405 events. 41978/82405 cut-off events. For 2582413/2583043 co-relation queries the response was YES. Maximal size of possible extension queue 1479. Compared 811448 event pairs, 8037 based on Foata normal form. 54/82458 useless extension candidates. Maximal degree in co-relation 556702. Up to 30071 conditions per place. [2023-11-29 06:59:34,708 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 1907 selfloop transitions, 743 changer transitions 15/2670 dead transitions. [2023-11-29 06:59:34,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 2670 transitions, 49857 flow [2023-11-29 06:59:34,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 06:59:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-11-29 06:59:34,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 1017 transitions. [2023-11-29 06:59:34,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3704918032786885 [2023-11-29 06:59:34,712 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 1017 transitions. [2023-11-29 06:59:34,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 1017 transitions. [2023-11-29 06:59:34,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:59:34,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 1017 transitions. [2023-11-29 06:59:34,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 16.672131147540984) internal successors, (1017), 61 states have internal predecessors, (1017), 0 states have call successors, (0), 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 06:59:34,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 45.0) internal successors, (2790), 62 states have internal predecessors, (2790), 0 states have call successors, (0), 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 06:59:34,717 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 45.0) internal successors, (2790), 62 states have internal predecessors, (2790), 0 states have call successors, (0), 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 06:59:34,717 INFO L175 Difference]: Start difference. First operand has 553 places, 1940 transitions, 36734 flow. Second operand 61 states and 1017 transitions. [2023-11-29 06:59:34,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 2670 transitions, 49857 flow [2023-11-29 07:00:25,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 2670 transitions, 47595 flow, removed 931 selfloop flow, removed 15 redundant places. [2023-11-29 07:00:25,728 INFO L231 Difference]: Finished difference. Result has 610 places, 2062 transitions, 39998 flow [2023-11-29 07:00:25,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=34777, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=621, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=39998, PETRI_PLACES=610, PETRI_TRANSITIONS=2062} [2023-11-29 07:00:25,730 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 566 predicate places. [2023-11-29 07:00:25,730 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 2062 transitions, 39998 flow [2023-11-29 07:00:25,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.9) internal successors, (297), 30 states have internal predecessors, (297), 0 states have call successors, (0), 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 07:00:25,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:00:25,731 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:00:25,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-29 07:00:25,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 07:00:25,931 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 07:00:25,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:00:25,932 INFO L85 PathProgramCache]: Analyzing trace with hash -676643144, now seen corresponding path program 1 times [2023-11-29 07:00:25,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:00:25,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189523493] [2023-11-29 07:00:25,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:00:25,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:00:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:00:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:00:26,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:00:26,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189523493] [2023-11-29 07:00:26,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189523493] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:00:26,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611594927] [2023-11-29 07:00:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:00:26,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:00:26,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:00:26,490 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:00:26,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 07:00:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:00:26,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 07:00:26,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:00:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 07:00:26,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:00:27,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 07:00:27,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2023-11-29 07:00:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 07:00:27,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611594927] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:00:27,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:00:27,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 7] total 28 [2023-11-29 07:00:27,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850743367] [2023-11-29 07:00:27,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:00:27,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 07:00:27,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:00:27,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 07:00:27,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2023-11-29 07:00:27,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2023-11-29 07:00:27,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 2062 transitions, 39998 flow. Second operand has 30 states, 30 states have (on average 11.633333333333333) internal successors, (349), 30 states have internal predecessors, (349), 0 states have call successors, (0), 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 07:00:27,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:00:27,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2023-11-29 07:00:27,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:01:23,916 INFO L124 PetriNetUnfolderBase]: 30071/67554 cut-off events. [2023-11-29 07:01:23,916 INFO L125 PetriNetUnfolderBase]: For 3046532/3051008 co-relation queries the response was YES. [2023-11-29 07:01:25,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495109 conditions, 67554 events. 30071/67554 cut-off events. For 3046532/3051008 co-relation queries the response was YES. Maximal size of possible extension queue 1433. Compared 737877 event pairs, 4041 based on Foata normal form. 4464/71165 useless extension candidates. Maximal degree in co-relation 494904. Up to 23448 conditions per place. [2023-11-29 07:01:26,162 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 2085 selfloop transitions, 995 changer transitions 44/3286 dead transitions. [2023-11-29 07:01:26,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 3286 transitions, 62273 flow [2023-11-29 07:01:26,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-29 07:01:26,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-11-29 07:01:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 1301 transitions. [2023-11-29 07:01:26,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39604261796042617 [2023-11-29 07:01:26,165 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 1301 transitions. [2023-11-29 07:01:26,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 1301 transitions. [2023-11-29 07:01:26,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:01:26,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 1301 transitions. [2023-11-29 07:01:26,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 17.82191780821918) internal successors, (1301), 73 states have internal predecessors, (1301), 0 states have call successors, (0), 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 07:01:26,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 45.0) internal successors, (3330), 74 states have internal predecessors, (3330), 0 states have call successors, (0), 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 07:01:26,173 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 45.0) internal successors, (3330), 74 states have internal predecessors, (3330), 0 states have call successors, (0), 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 07:01:26,173 INFO L175 Difference]: Start difference. First operand has 610 places, 2062 transitions, 39998 flow. Second operand 73 states and 1301 transitions. [2023-11-29 07:01:26,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 677 places, 3286 transitions, 62273 flow [2023-11-29 07:02:09,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 3286 transitions, 60409 flow, removed 530 selfloop flow, removed 32 redundant places. [2023-11-29 07:02:10,051 INFO L231 Difference]: Finished difference. Result has 670 places, 2372 transitions, 50551 flow [2023-11-29 07:02:10,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=36347, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1061, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=50551, PETRI_PLACES=670, PETRI_TRANSITIONS=2372} [2023-11-29 07:02:10,053 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 626 predicate places. [2023-11-29 07:02:10,053 INFO L495 AbstractCegarLoop]: Abstraction has has 670 places, 2372 transitions, 50551 flow [2023-11-29 07:02:10,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 11.633333333333333) internal successors, (349), 30 states have internal predecessors, (349), 0 states have call successors, (0), 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 07:02:10,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:02:10,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:02:10,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 07:02:10,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 07:02:10,254 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 07:02:10,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:10,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1211883632, now seen corresponding path program 2 times [2023-11-29 07:02:10,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:10,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929915332] [2023-11-29 07:02:10,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:10,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:02:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:10,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:02:10,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929915332] [2023-11-29 07:02:10,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929915332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:02:10,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917072852] [2023-11-29 07:02:10,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 07:02:10,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:10,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:02:10,783 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:02:10,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 07:02:10,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 07:02:10,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 07:02:10,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 07:02:10,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:02:10,961 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 07:02:11,343 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-11-29 07:02:11,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2023-11-29 07:02:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:11,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:02:12,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2023-11-29 07:02:12,296 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-29 07:02:12,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 128 [2023-11-29 07:02:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:02:13,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917072852] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:02:13,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:02:13,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2023-11-29 07:02:13,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038508712] [2023-11-29 07:02:13,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:02:13,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 07:02:13,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:02:13,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 07:02:13,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 07:02:14,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2023-11-29 07:02:14,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 670 places, 2372 transitions, 50551 flow. Second operand has 39 states, 39 states have (on average 11.487179487179487) internal successors, (448), 39 states have internal predecessors, (448), 0 states have call successors, (0), 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 07:02:14,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:02:14,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2023-11-29 07:02:14,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:03:21,425 INFO L124 PetriNetUnfolderBase]: 30394/67967 cut-off events. [2023-11-29 07:03:21,426 INFO L125 PetriNetUnfolderBase]: For 3576924/3581308 co-relation queries the response was YES. [2023-11-29 07:03:23,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537839 conditions, 67967 events. 30394/67967 cut-off events. For 3576924/3581308 co-relation queries the response was YES. Maximal size of possible extension queue 1435. Compared 742268 event pairs, 9073 based on Foata normal form. 1283/68102 useless extension candidates. Maximal degree in co-relation 537614. Up to 31223 conditions per place. [2023-11-29 07:03:23,813 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 2328 selfloop transitions, 345 changer transitions 5/2840 dead transitions. [2023-11-29 07:03:23,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 717 places, 2840 transitions, 59794 flow [2023-11-29 07:03:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 07:03:23,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-29 07:03:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 816 transitions. [2023-11-29 07:03:23,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37006802721088433 [2023-11-29 07:03:23,815 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 816 transitions. [2023-11-29 07:03:23,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 816 transitions. [2023-11-29 07:03:23,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:03:23,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 816 transitions. [2023-11-29 07:03:23,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 16.653061224489797) internal successors, (816), 49 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 07:03:23,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 45.0) internal successors, (2250), 50 states have internal predecessors, (2250), 0 states have call successors, (0), 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 07:03:23,820 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 45.0) internal successors, (2250), 50 states have internal predecessors, (2250), 0 states have call successors, (0), 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 07:03:23,820 INFO L175 Difference]: Start difference. First operand has 670 places, 2372 transitions, 50551 flow. Second operand 49 states and 816 transitions. [2023-11-29 07:03:23,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 717 places, 2840 transitions, 59794 flow [2023-11-29 07:04:31,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 689 places, 2840 transitions, 57773 flow, removed 903 selfloop flow, removed 28 redundant places. [2023-11-29 07:04:31,199 INFO L231 Difference]: Finished difference. Result has 704 places, 2437 transitions, 51214 flow [2023-11-29 07:04:31,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=48578, PETRI_DIFFERENCE_MINUEND_PLACES=641, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2028, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=51214, PETRI_PLACES=704, PETRI_TRANSITIONS=2437} [2023-11-29 07:04:31,202 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 660 predicate places. [2023-11-29 07:04:31,202 INFO L495 AbstractCegarLoop]: Abstraction has has 704 places, 2437 transitions, 51214 flow [2023-11-29 07:04:31,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 11.487179487179487) internal successors, (448), 39 states have internal predecessors, (448), 0 states have call successors, (0), 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 07:04:31,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:04:31,203 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:04:31,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-29 07:04:31,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:04:31,403 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 07:04:31,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:04:31,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1163944060, now seen corresponding path program 3 times [2023-11-29 07:04:31,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:04:31,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131165259] [2023-11-29 07:04:31,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:04:31,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:04:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:04:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:04:32,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:04:32,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131165259] [2023-11-29 07:04:32,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131165259] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:04:32,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957524661] [2023-11-29 07:04:32,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 07:04:32,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:04:32,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:04:32,030 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:04:32,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 07:04:32,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 07:04:32,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 07:04:32,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 07:04:32,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:04:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 07:04:32,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:04:32,565 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-11-29 07:04:32,565 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 48 treesize of output 37 [2023-11-29 07:04:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 07:04:32,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957524661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:04:32,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:04:32,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 26 [2023-11-29 07:04:32,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915793473] [2023-11-29 07:04:32,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:04:32,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 07:04:32,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:04:32,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 07:04:32,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2023-11-29 07:04:32,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2023-11-29 07:04:32,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 2437 transitions, 51214 flow. Second operand has 28 states, 28 states have (on average 11.642857142857142) internal successors, (326), 28 states have internal predecessors, (326), 0 states have call successors, (0), 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 07:04:32,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:04:32,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2023-11-29 07:04:32,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 07:05:58,046 INFO L124 PetriNetUnfolderBase]: 36542/83152 cut-off events. [2023-11-29 07:05:58,046 INFO L125 PetriNetUnfolderBase]: For 4198464/4204753 co-relation queries the response was YES. [2023-11-29 07:06:00,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 646437 conditions, 83152 events. 36542/83152 cut-off events. For 4198464/4204753 co-relation queries the response was YES. Maximal size of possible extension queue 1500. Compared 893955 event pairs, 2984 based on Foata normal form. 3848/85954 useless extension candidates. Maximal degree in co-relation 646197. Up to 12416 conditions per place. [2023-11-29 07:06:01,109 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 1653 selfloop transitions, 1989 changer transitions 117/3919 dead transitions. [2023-11-29 07:06:01,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 793 places, 3919 transitions, 78827 flow [2023-11-29 07:06:01,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-11-29 07:06:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2023-11-29 07:06:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 1672 transitions. [2023-11-29 07:06:01,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128395061728395 [2023-11-29 07:06:01,113 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 1672 transitions. [2023-11-29 07:06:01,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 1672 transitions. [2023-11-29 07:06:01,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:06:01,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 1672 transitions. [2023-11-29 07:06:01,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 18.57777777777778) internal successors, (1672), 90 states have internal predecessors, (1672), 0 states have call successors, (0), 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 07:06:01,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 45.0) internal successors, (4095), 91 states have internal predecessors, (4095), 0 states have call successors, (0), 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 07:06:01,126 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 45.0) internal successors, (4095), 91 states have internal predecessors, (4095), 0 states have call successors, (0), 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 07:06:01,126 INFO L175 Difference]: Start difference. First operand has 704 places, 2437 transitions, 51214 flow. Second operand 90 states and 1672 transitions. [2023-11-29 07:06:01,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 793 places, 3919 transitions, 78827 flow [2023-11-29 07:07:15,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 771 places, 3919 transitions, 78444 flow, removed 99 selfloop flow, removed 22 redundant places. [2023-11-29 07:07:15,943 INFO L231 Difference]: Finished difference. Result has 799 places, 2947 transitions, 68637 flow [2023-11-29 07:07:15,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=50824, PETRI_DIFFERENCE_MINUEND_PLACES=682, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1491, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=68637, PETRI_PLACES=799, PETRI_TRANSITIONS=2947} [2023-11-29 07:07:15,945 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 755 predicate places. [2023-11-29 07:07:15,946 INFO L495 AbstractCegarLoop]: Abstraction has has 799 places, 2947 transitions, 68637 flow [2023-11-29 07:07:15,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.642857142857142) internal successors, (326), 28 states have internal predecessors, (326), 0 states have call successors, (0), 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 07:07:15,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:07:15,946 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 07:07:15,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 07:07:16,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:07:16,146 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 21 more)] === [2023-11-29 07:07:16,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:07:16,147 INFO L85 PathProgramCache]: Analyzing trace with hash 960124488, now seen corresponding path program 4 times [2023-11-29 07:07:16,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:07:16,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401556932] [2023-11-29 07:07:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:07:16,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:07:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:07:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:16,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:07:16,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401556932] [2023-11-29 07:07:16,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401556932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:07:16,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438308103] [2023-11-29 07:07:16,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 07:07:16,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:07:16,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:07:16,600 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:07:16,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9b50d45-415c-4487-983b-3fa102b3a355/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 07:07:16,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 07:07:16,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 07:07:16,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 07:07:16,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:07:17,351 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-11-29 07:07:17,351 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 46 treesize of output 19 [2023-11-29 07:07:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:17,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:07:17,756 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-29 07:07:17,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 50 [2023-11-29 07:07:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 07:07:18,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438308103] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:07:18,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 07:07:18,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2023-11-29 07:07:18,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343674345] [2023-11-29 07:07:18,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 07:07:18,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 07:07:18,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:07:18,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 07:07:18,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 07:07:18,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 45 [2023-11-29 07:07:18,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 799 places, 2947 transitions, 68637 flow. Second operand has 39 states, 39 states have (on average 11.487179487179487) internal successors, (448), 39 states have internal predecessors, (448), 0 states have call successors, (0), 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 07:07:18,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 07:07:18,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 45 [2023-11-29 07:07:18,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand