./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/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_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/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_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/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 ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:36:28,413 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:36:28,499 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-29 05:36:28,503 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:36:28,503 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:36:28,525 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:36:28,526 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:36:28,526 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:36:28,527 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:36:28,527 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:36:28,528 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:36:28,528 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:36:28,529 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:36:28,530 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:36:28,530 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:36:28,531 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:36:28,531 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:36:28,532 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:36:28,532 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:36:28,533 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:36:28,533 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:36:28,534 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:36:28,534 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:36:28,534 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:36:28,535 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-29 05:36:28,535 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:36:28,536 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:36:28,536 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:36:28,536 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:36:28,537 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:36:28,537 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:36:28,537 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:36:28,538 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:36:28,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:36:28,538 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:36:28,538 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:36:28,539 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:36:28,539 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:36:28,539 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:36:28,539 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:36:28,539 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:36:28,540 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:36:28,540 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:36:28,540 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:36:28,540 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_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 [2023-11-29 05:36:28,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:36:28,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:36:28,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:36:28,805 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:36:28,808 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:36:28,810 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-11-29 05:36:31,443 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:36:31,649 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:36:31,650 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-11-29 05:36:31,658 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/data/ee0e79f0d/0172af72e774470b8491d874c2375e5b/FLAG327d30f9e [2023-11-29 05:36:31,670 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/data/ee0e79f0d/0172af72e774470b8491d874c2375e5b [2023-11-29 05:36:31,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:36:31,673 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:36:31,675 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:36:31,675 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:36:31,679 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:36:31,680 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:36:31" (1/1) ... [2023-11-29 05:36:31,681 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@519360e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:36:31, skipping insertion in model container [2023-11-29 05:36:31,681 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:36:31" (1/1) ... [2023-11-29 05:36:31,704 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:36:31,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:36:31,871 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:36:31,897 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:36:31,905 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:36:31,906 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:36:31,911 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:36:31,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:36:31 WrapperNode [2023-11-29 05:36:31,912 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:36:31,913 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:36:31,913 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:36:31,913 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:36:31,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:36:31" (1/1) ... [2023-11-29 05:36:31,927 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:36:31" (1/1) ... [2023-11-29 05:36:31,957 INFO L138 Inliner]: procedures = 26, calls = 41, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 186 [2023-11-29 05:36:31,957 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:36:31,958 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:36:31,958 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:36:31,958 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:36:31,968 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:36:31" (1/1) ... [2023-11-29 05:36:31,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:36:31" (1/1) ... [2023-11-29 05:36:31,973 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:36:31" (1/1) ... [2023-11-29 05:36:31,990 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 3, 2, 2]. 33 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 05:36:31,990 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:36:31" (1/1) ... [2023-11-29 05:36:31,990 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:36:31" (1/1) ... [2023-11-29 05:36:31,999 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:36:31" (1/1) ... [2023-11-29 05:36:32,004 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:36:31" (1/1) ... [2023-11-29 05:36:32,008 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:36:31" (1/1) ... [2023-11-29 05:36:32,010 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:36:31" (1/1) ... [2023-11-29 05:36:32,013 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:36:32,013 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:36:32,014 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:36:32,014 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:36:32,014 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:36:31" (1/1) ... [2023-11-29 05:36:32,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:36:32,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:32,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:36:32,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:36:32,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:36:32,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:36:32,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:36:32,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:36:32,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:36:32,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 05:36:32,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:36:32,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:36:32,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:36:32,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 05:36:32,086 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:36:32,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:36:32,086 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:36:32,086 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:36:32,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:36:32,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:36:32,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:36:32,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 05:36:32,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 05:36:32,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 05:36:32,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:36:32,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:36:32,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:36:32,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:36:32,090 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 05:36:32,213 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:36:32,215 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:36:32,523 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:36:32,854 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:36:32,854 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 05:36:32,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:36:32 BoogieIcfgContainer [2023-11-29 05:36:32,855 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:36:32,857 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:36:32,857 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:36:32,860 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:36:32,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:36:31" (1/3) ... [2023-11-29 05:36:32,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e1f17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:36:32, skipping insertion in model container [2023-11-29 05:36:32,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:36:31" (2/3) ... [2023-11-29 05:36:32,862 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e1f17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:36:32, skipping insertion in model container [2023-11-29 05:36:32,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:36:32" (3/3) ... [2023-11-29 05:36:32,863 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2023-11-29 05:36:32,873 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 05:36:32,883 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:36:32,883 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-29 05:36:32,883 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:36:32,987 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 05:36:33,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 49 transitions, 112 flow [2023-11-29 05:36:33,056 INFO L124 PetriNetUnfolderBase]: 3/47 cut-off events. [2023-11-29 05:36:33,057 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:36:33,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 47 events. 3/47 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 133 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2023-11-29 05:36:33,060 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 49 transitions, 112 flow [2023-11-29 05:36:33,064 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 45 transitions, 99 flow [2023-11-29 05:36:33,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:36:33,080 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;@32dc9567, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:36:33,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2023-11-29 05:36:33,084 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:36:33,084 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-11-29 05:36:33,084 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 05:36:33,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:33,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:36:33,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:33,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:33,091 INFO L85 PathProgramCache]: Analyzing trace with hash 614702, now seen corresponding path program 1 times [2023-11-29 05:36:33,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:33,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475038530] [2023-11-29 05:36:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:33,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:33,357 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 05:36:33,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:33,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475038530] [2023-11-29 05:36:33,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475038530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:36:33,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:36:33,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:36:33,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213975279] [2023-11-29 05:36:33,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:36:33,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:36:33,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:33,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:36:33,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:36:33,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 05:36:33,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:33,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:33,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 05:36:33,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:33,622 INFO L124 PetriNetUnfolderBase]: 227/450 cut-off events. [2023-11-29 05:36:33,622 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-29 05:36:33,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 874 conditions, 450 events. 227/450 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 2453 event pairs, 189 based on Foata normal form. 1/272 useless extension candidates. Maximal degree in co-relation 774. Up to 393 conditions per place. [2023-11-29 05:36:33,629 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 27 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2023-11-29 05:36:33,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 159 flow [2023-11-29 05:36:33,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:36:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:36:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2023-11-29 05:36:33,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49489795918367346 [2023-11-29 05:36:33,640 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 97 transitions. [2023-11-29 05:36:33,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 97 transitions. [2023-11-29 05:36:33,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:33,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 97 transitions. [2023-11-29 05:36:33,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:33,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:33,649 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:33,651 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 99 flow. Second operand 4 states and 97 transitions. [2023-11-29 05:36:33,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 159 flow [2023-11-29 05:36:33,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:36:33,657 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 115 flow [2023-11-29 05:36:33,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-11-29 05:36:33,662 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-11-29 05:36:33,663 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 115 flow [2023-11-29 05:36:33,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:33,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:33,663 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-29 05:36:33,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:36:33,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:33,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:33,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1133318385, now seen corresponding path program 1 times [2023-11-29 05:36:33,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:33,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680712645] [2023-11-29 05:36:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:33,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:33,784 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 05:36:33,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:33,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680712645] [2023-11-29 05:36:33,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680712645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:33,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161197956] [2023-11-29 05:36:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:33,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:33,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:33,789 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:33,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:36:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:33,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:36:33,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:33,963 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 05:36:33,963 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:36:33,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161197956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:36:33,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:36:33,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-29 05:36:33,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998847888] [2023-11-29 05:36:33,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:36:33,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:36:33,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:33,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:36:33,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:36:33,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 05:36:33,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 115 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 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 05:36:33,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:33,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 05:36:33,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:34,169 INFO L124 PetriNetUnfolderBase]: 227/449 cut-off events. [2023-11-29 05:36:34,169 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:36:34,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 449 events. 227/449 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 2452 event pairs, 189 based on Foata normal form. 1/272 useless extension candidates. Maximal degree in co-relation 848. Up to 388 conditions per place. [2023-11-29 05:36:34,174 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 23 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2023-11-29 05:36:34,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 171 flow [2023-11-29 05:36:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:36:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:36:34,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2023-11-29 05:36:34,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2023-11-29 05:36:34,177 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 121 transitions. [2023-11-29 05:36:34,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 121 transitions. [2023-11-29 05:36:34,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:34,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 121 transitions. [2023-11-29 05:36:34,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:34,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:34,181 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:34,181 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 115 flow. Second operand 6 states and 121 transitions. [2023-11-29 05:36:34,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 171 flow [2023-11-29 05:36:34,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:36:34,184 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 122 flow [2023-11-29 05:36:34,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=122, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-11-29 05:36:34,185 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 1 predicate places. [2023-11-29 05:36:34,185 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 122 flow [2023-11-29 05:36:34,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 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 05:36:34,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:34,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:36:34,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:36:34,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:34,389 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:34,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:34,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1135304966, now seen corresponding path program 1 times [2023-11-29 05:36:34,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:34,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577814431] [2023-11-29 05:36:34,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:34,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:34,492 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 05:36:34,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:34,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577814431] [2023-11-29 05:36:34,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577814431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:36:34,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:36:34,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:36:34,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564880961] [2023-11-29 05:36:34,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:36:34,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:36:34,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:34,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:36:34,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:36:34,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 05:36:34,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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 05:36:34,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:34,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 05:36:34,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:34,792 INFO L124 PetriNetUnfolderBase]: 329/667 cut-off events. [2023-11-29 05:36:34,792 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-29 05:36:34,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1297 conditions, 667 events. 329/667 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 3745 event pairs, 258 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 955. Up to 434 conditions per place. [2023-11-29 05:36:34,798 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 50 selfloop transitions, 5 changer transitions 2/70 dead transitions. [2023-11-29 05:36:34,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 296 flow [2023-11-29 05:36:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:36:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:36:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2023-11-29 05:36:34,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563265306122449 [2023-11-29 05:36:34,803 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 138 transitions. [2023-11-29 05:36:34,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 138 transitions. [2023-11-29 05:36:34,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:34,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 138 transitions. [2023-11-29 05:36:34,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:34,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:34,806 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:34,806 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 122 flow. Second operand 5 states and 138 transitions. [2023-11-29 05:36:34,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 296 flow [2023-11-29 05:36:34,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 274 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-29 05:36:34,809 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2023-11-29 05:36:34,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-29 05:36:34,810 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 2 predicate places. [2023-11-29 05:36:34,810 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2023-11-29 05:36:34,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 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 05:36:34,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:34,811 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2023-11-29 05:36:34,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:36:34,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:34,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:34,812 INFO L85 PathProgramCache]: Analyzing trace with hash 773132172, now seen corresponding path program 1 times [2023-11-29 05:36:34,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:34,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832822726] [2023-11-29 05:36:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:34,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:34,884 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 05:36:34,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:34,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832822726] [2023-11-29 05:36:34,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832822726] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:34,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007521848] [2023-11-29 05:36:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:34,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:34,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:34,886 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:34,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:36:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:34,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:36:34,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:35,009 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 05:36:35,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:36:35,053 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 05:36:35,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007521848] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:36:35,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:36:35,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-29 05:36:35,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152068301] [2023-11-29 05:36:35,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:36:35,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:36:35,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:35,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:36:35,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:36:35,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 05:36:35,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 125 flow. Second operand has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:35,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:35,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 05:36:35,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:35,325 INFO L124 PetriNetUnfolderBase]: 306/686 cut-off events. [2023-11-29 05:36:35,325 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2023-11-29 05:36:35,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1405 conditions, 686 events. 306/686 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4130 event pairs, 258 based on Foata normal form. 3/468 useless extension candidates. Maximal degree in co-relation 994. Up to 542 conditions per place. [2023-11-29 05:36:35,331 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 28 selfloop transitions, 13 changer transitions 0/54 dead transitions. [2023-11-29 05:36:35,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 237 flow [2023-11-29 05:36:35,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:36:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:36:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2023-11-29 05:36:35,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39183673469387753 [2023-11-29 05:36:35,334 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 192 transitions. [2023-11-29 05:36:35,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 192 transitions. [2023-11-29 05:36:35,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:35,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 192 transitions. [2023-11-29 05:36:35,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 19.2) internal successors, (192), 10 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:35,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:35,337 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:35,337 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 10 states and 192 transitions. [2023-11-29 05:36:35,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 237 flow [2023-11-29 05:36:35,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 54 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:36:35,341 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 194 flow [2023-11-29 05:36:35,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=194, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2023-11-29 05:36:35,342 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 12 predicate places. [2023-11-29 05:36:35,342 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 194 flow [2023-11-29 05:36:35,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:35,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:35,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:35,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:36:35,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:35,545 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:35,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:35,545 INFO L85 PathProgramCache]: Analyzing trace with hash 72328396, now seen corresponding path program 1 times [2023-11-29 05:36:35,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:35,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760393938] [2023-11-29 05:36:35,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:35,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:35,615 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 05:36:35,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:35,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760393938] [2023-11-29 05:36:35,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760393938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:36:35,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:36:35,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:36:35,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515477022] [2023-11-29 05:36:35,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:36:35,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:36:35,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:35,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:36:35,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:36:35,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2023-11-29 05:36:35,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:35,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:35,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2023-11-29 05:36:35,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:35,787 INFO L124 PetriNetUnfolderBase]: 279/597 cut-off events. [2023-11-29 05:36:35,787 INFO L125 PetriNetUnfolderBase]: For 118/135 co-relation queries the response was YES. [2023-11-29 05:36:35,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1237 conditions, 597 events. 279/597 cut-off events. For 118/135 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3249 event pairs, 228 based on Foata normal form. 0/399 useless extension candidates. Maximal degree in co-relation 1201. Up to 443 conditions per place. [2023-11-29 05:36:35,791 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 36 selfloop transitions, 2 changer transitions 16/67 dead transitions. [2023-11-29 05:36:35,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 67 transitions, 341 flow [2023-11-29 05:36:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:36:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:36:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2023-11-29 05:36:35,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2023-11-29 05:36:35,793 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 126 transitions. [2023-11-29 05:36:35,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 126 transitions. [2023-11-29 05:36:35,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:35,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 126 transitions. [2023-11-29 05:36:35,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:35,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:35,795 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:35,795 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 194 flow. Second operand 5 states and 126 transitions. [2023-11-29 05:36:35,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 67 transitions, 341 flow [2023-11-29 05:36:35,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 67 transitions, 330 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 05:36:35,800 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 176 flow [2023-11-29 05:36:35,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-11-29 05:36:35,801 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2023-11-29 05:36:35,801 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 176 flow [2023-11-29 05:36:35,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:35,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:35,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:35,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 05:36:35,802 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:35,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:35,802 INFO L85 PathProgramCache]: Analyzing trace with hash -47319454, now seen corresponding path program 1 times [2023-11-29 05:36:35,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:35,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466622825] [2023-11-29 05:36:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:35,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:36,044 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 05:36:36,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:36,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466622825] [2023-11-29 05:36:36,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466622825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:36,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063640902] [2023-11-29 05:36:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:36,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:36,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:36,049 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:36,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:36:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:36,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 05:36:36,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:36,204 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 05:36:36,255 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 05:36:36,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:36:36,316 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 16 treesize of output 14 [2023-11-29 05:36:36,321 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 20 [2023-11-29 05:36:36,332 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 05:36:36,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063640902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:36:36,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:36:36,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-29 05:36:36,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924918833] [2023-11-29 05:36:36,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:36:36,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:36:36,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:36,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:36:36,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:36:36,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:36:36,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 176 flow. Second operand has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:36,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:36,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:36:36,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:36,768 INFO L124 PetriNetUnfolderBase]: 377/868 cut-off events. [2023-11-29 05:36:36,768 INFO L125 PetriNetUnfolderBase]: For 106/140 co-relation queries the response was YES. [2023-11-29 05:36:36,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1708 conditions, 868 events. 377/868 cut-off events. For 106/140 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5395 event pairs, 93 based on Foata normal form. 0/566 useless extension candidates. Maximal degree in co-relation 1684. Up to 231 conditions per place. [2023-11-29 05:36:36,776 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 50 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2023-11-29 05:36:36,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 79 transitions, 376 flow [2023-11-29 05:36:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:36:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:36:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2023-11-29 05:36:36,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923469387755102 [2023-11-29 05:36:36,778 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 193 transitions. [2023-11-29 05:36:36,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 193 transitions. [2023-11-29 05:36:36,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:36,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 193 transitions. [2023-11-29 05:36:36,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 24.125) internal successors, (193), 8 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:36,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:36,781 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:36,781 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 176 flow. Second operand 8 states and 193 transitions. [2023-11-29 05:36:36,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 79 transitions, 376 flow [2023-11-29 05:36:36,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 350 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-11-29 05:36:36,785 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 229 flow [2023-11-29 05:36:36,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=229, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-11-29 05:36:36,786 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 15 predicate places. [2023-11-29 05:36:36,786 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 229 flow [2023-11-29 05:36:36,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:36,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:36,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:36,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:36:36,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:36,993 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:36,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:36,993 INFO L85 PathProgramCache]: Analyzing trace with hash -47319453, now seen corresponding path program 1 times [2023-11-29 05:36:36,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:36,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247897124] [2023-11-29 05:36:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:36,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:37,213 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 05:36:37,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:37,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247897124] [2023-11-29 05:36:37,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247897124] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:37,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470368858] [2023-11-29 05:36:37,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:37,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:37,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:37,215 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:37,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:36:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:37,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:36:37,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:37,336 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 05:36:37,371 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 05:36:37,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:36:37,418 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 14 treesize of output 12 [2023-11-29 05:36:37,422 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 18 treesize of output 16 [2023-11-29 05:36:37,432 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 05:36:37,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470368858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:36:37,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:36:37,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-29 05:36:37,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73338050] [2023-11-29 05:36:37,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:36:37,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:36:37,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:37,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:36:37,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:36:37,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:36:37,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 229 flow. Second operand has 10 states, 10 states have (on average 18.4) internal successors, (184), 10 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:37,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:37,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:36:37,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:37,785 INFO L124 PetriNetUnfolderBase]: 351/794 cut-off events. [2023-11-29 05:36:37,785 INFO L125 PetriNetUnfolderBase]: For 283/283 co-relation queries the response was YES. [2023-11-29 05:36:37,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1817 conditions, 794 events. 351/794 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4728 event pairs, 83 based on Foata normal form. 0/546 useless extension candidates. Maximal degree in co-relation 1785. Up to 231 conditions per place. [2023-11-29 05:36:37,793 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 49 selfloop transitions, 15 changer transitions 0/78 dead transitions. [2023-11-29 05:36:37,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 401 flow [2023-11-29 05:36:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:36:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:36:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2023-11-29 05:36:37,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2023-11-29 05:36:37,795 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 192 transitions. [2023-11-29 05:36:37,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 192 transitions. [2023-11-29 05:36:37,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:37,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 192 transitions. [2023-11-29 05:36:37,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:37,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:37,798 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:37,798 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 229 flow. Second operand 8 states and 192 transitions. [2023-11-29 05:36:37,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 401 flow [2023-11-29 05:36:37,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 391 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:36:37,802 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 245 flow [2023-11-29 05:36:37,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2023-11-29 05:36:37,803 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 18 predicate places. [2023-11-29 05:36:37,803 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 245 flow [2023-11-29 05:36:37,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.4) internal successors, (184), 10 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:37,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:37,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:37,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:36:38,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 05:36:38,009 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:38,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:38,009 INFO L85 PathProgramCache]: Analyzing trace with hash -47319451, now seen corresponding path program 1 times [2023-11-29 05:36:38,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:38,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351713912] [2023-11-29 05:36:38,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:38,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:38,096 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 05:36:38,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:38,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351713912] [2023-11-29 05:36:38,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351713912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:36:38,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:36:38,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:36:38,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468876674] [2023-11-29 05:36:38,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:36:38,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:36:38,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:38,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:36:38,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:36:38,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 05:36:38,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 245 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 05:36:38,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:38,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 05:36:38,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:38,282 INFO L124 PetriNetUnfolderBase]: 512/1137 cut-off events. [2023-11-29 05:36:38,282 INFO L125 PetriNetUnfolderBase]: For 797/797 co-relation queries the response was YES. [2023-11-29 05:36:38,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2703 conditions, 1137 events. 512/1137 cut-off events. For 797/797 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 7271 event pairs, 139 based on Foata normal form. 0/850 useless extension candidates. Maximal degree in co-relation 2671. Up to 718 conditions per place. [2023-11-29 05:36:38,290 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 56 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2023-11-29 05:36:38,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 71 transitions, 410 flow [2023-11-29 05:36:38,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:36:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:36:38,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2023-11-29 05:36:38,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2023-11-29 05:36:38,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 92 transitions. [2023-11-29 05:36:38,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 92 transitions. [2023-11-29 05:36:38,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:38,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 92 transitions. [2023-11-29 05:36:38,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:38,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:38,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:38,293 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 245 flow. Second operand 3 states and 92 transitions. [2023-11-29 05:36:38,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 71 transitions, 410 flow [2023-11-29 05:36:38,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 395 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 05:36:38,296 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 257 flow [2023-11-29 05:36:38,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=257, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2023-11-29 05:36:38,297 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2023-11-29 05:36:38,297 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 257 flow [2023-11-29 05:36:38,298 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 05:36:38,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:38,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:38,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 05:36:38,298 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:38,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:38,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1736595177, now seen corresponding path program 1 times [2023-11-29 05:36:38,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:38,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014211236] [2023-11-29 05:36:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:38,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:38,492 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 05:36:38,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:38,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014211236] [2023-11-29 05:36:38,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014211236] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:38,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037736574] [2023-11-29 05:36:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:38,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:38,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:38,494 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:38,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:36:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:38,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 05:36:38,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:38,619 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 05:36:38,670 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 05:36:38,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:36:38,724 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 14 treesize of output 12 [2023-11-29 05:36:38,728 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 18 treesize of output 16 [2023-11-29 05:36:38,739 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 05:36:38,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037736574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:36:38,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:36:38,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-29 05:36:38,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074938587] [2023-11-29 05:36:38,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:36:38,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:36:38,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:38,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:36:38,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:36:38,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:36:38,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 257 flow. Second operand has 11 states, 11 states have (on average 18.818181818181817) internal successors, (207), 11 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:38,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:38,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:36:38,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:39,171 INFO L124 PetriNetUnfolderBase]: 580/1352 cut-off events. [2023-11-29 05:36:39,171 INFO L125 PetriNetUnfolderBase]: For 885/885 co-relation queries the response was YES. [2023-11-29 05:36:39,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3339 conditions, 1352 events. 580/1352 cut-off events. For 885/885 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9149 event pairs, 153 based on Foata normal form. 0/1028 useless extension candidates. Maximal degree in co-relation 3308. Up to 361 conditions per place. [2023-11-29 05:36:39,185 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 65 selfloop transitions, 15 changer transitions 0/96 dead transitions. [2023-11-29 05:36:39,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 96 transitions, 607 flow [2023-11-29 05:36:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:36:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:36:39,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2023-11-29 05:36:39,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4923469387755102 [2023-11-29 05:36:39,186 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 193 transitions. [2023-11-29 05:36:39,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 193 transitions. [2023-11-29 05:36:39,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:39,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 193 transitions. [2023-11-29 05:36:39,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 24.125) internal successors, (193), 8 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:39,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:39,189 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:39,189 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 257 flow. Second operand 8 states and 193 transitions. [2023-11-29 05:36:39,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 96 transitions, 607 flow [2023-11-29 05:36:39,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 604 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:36:39,194 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 327 flow [2023-11-29 05:36:39,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2023-11-29 05:36:39,195 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 24 predicate places. [2023-11-29 05:36:39,195 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 327 flow [2023-11-29 05:36:39,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.818181818181817) internal successors, (207), 11 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:39,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:39,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:39,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:36:39,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:39,400 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:39,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:39,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1736595178, now seen corresponding path program 1 times [2023-11-29 05:36:39,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:39,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889853575] [2023-11-29 05:36:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:39,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:39,628 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 05:36:39,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:39,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889853575] [2023-11-29 05:36:39,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889853575] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:39,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840822689] [2023-11-29 05:36:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:39,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:39,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:39,630 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:39,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:36:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:39,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 05:36:39,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:39,746 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 05:36:39,786 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 05:36:39,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:36:39,837 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 16 treesize of output 14 [2023-11-29 05:36:39,841 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 20 [2023-11-29 05:36:39,849 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 05:36:39,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840822689] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:36:39,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:36:39,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-29 05:36:39,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422976465] [2023-11-29 05:36:39,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:36:39,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:36:39,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:39,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:36:39,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:36:39,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2023-11-29 05:36:39,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 18.8) internal successors, (188), 10 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:39,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:39,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2023-11-29 05:36:39,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:40,241 INFO L124 PetriNetUnfolderBase]: 543/1302 cut-off events. [2023-11-29 05:36:40,242 INFO L125 PetriNetUnfolderBase]: For 1256/1256 co-relation queries the response was YES. [2023-11-29 05:36:40,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3715 conditions, 1302 events. 543/1302 cut-off events. For 1256/1256 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8753 event pairs, 153 based on Foata normal form. 0/1062 useless extension candidates. Maximal degree in co-relation 3679. Up to 361 conditions per place. [2023-11-29 05:36:40,256 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 64 selfloop transitions, 15 changer transitions 0/95 dead transitions. [2023-11-29 05:36:40,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 95 transitions, 655 flow [2023-11-29 05:36:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:36:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:36:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2023-11-29 05:36:40,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2023-11-29 05:36:40,258 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 192 transitions. [2023-11-29 05:36:40,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 192 transitions. [2023-11-29 05:36:40,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:40,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 192 transitions. [2023-11-29 05:36:40,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:40,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:40,260 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 49.0) internal successors, (441), 9 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:40,261 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 327 flow. Second operand 8 states and 192 transitions. [2023-11-29 05:36:40,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 95 transitions, 655 flow [2023-11-29 05:36:40,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 95 transitions, 645 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:36:40,266 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 343 flow [2023-11-29 05:36:40,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=343, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2023-11-29 05:36:40,267 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 27 predicate places. [2023-11-29 05:36:40,267 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 343 flow [2023-11-29 05:36:40,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.8) internal successors, (188), 10 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:40,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:40,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:40,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:36:40,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:36:40,469 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:40,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:40,469 INFO L85 PathProgramCache]: Analyzing trace with hash -943831273, now seen corresponding path program 1 times [2023-11-29 05:36:40,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:40,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248251578] [2023-11-29 05:36:40,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:40,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:40,520 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 05:36:40,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:40,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248251578] [2023-11-29 05:36:40,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248251578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:36:40,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:36:40,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:36:40,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384649887] [2023-11-29 05:36:40,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:36:40,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:36:40,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:40,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:36:40,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:36:40,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-29 05:36:40,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 343 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 05:36:40,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:40,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-29 05:36:40,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:40,821 INFO L124 PetriNetUnfolderBase]: 711/1462 cut-off events. [2023-11-29 05:36:40,821 INFO L125 PetriNetUnfolderBase]: For 2170/2171 co-relation queries the response was YES. [2023-11-29 05:36:40,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4667 conditions, 1462 events. 711/1462 cut-off events. For 2170/2171 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9212 event pairs, 377 based on Foata normal form. 53/1275 useless extension candidates. Maximal degree in co-relation 4631. Up to 880 conditions per place. [2023-11-29 05:36:40,833 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 79 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-11-29 05:36:40,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 96 transitions, 701 flow [2023-11-29 05:36:40,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:36:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:36:40,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2023-11-29 05:36:40,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5867346938775511 [2023-11-29 05:36:40,834 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 115 transitions. [2023-11-29 05:36:40,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 115 transitions. [2023-11-29 05:36:40,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:40,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 115 transitions. [2023-11-29 05:36:40,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:40,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:40,835 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:40,835 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 343 flow. Second operand 4 states and 115 transitions. [2023-11-29 05:36:40,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 96 transitions, 701 flow [2023-11-29 05:36:40,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 682 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 05:36:40,840 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 351 flow [2023-11-29 05:36:40,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=351, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2023-11-29 05:36:40,840 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 27 predicate places. [2023-11-29 05:36:40,841 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 351 flow [2023-11-29 05:36:40,841 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 05:36:40,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:40,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:40,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 05:36:40,841 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:40,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:40,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2026603328, now seen corresponding path program 1 times [2023-11-29 05:36:40,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:40,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376209527] [2023-11-29 05:36:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:40,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:40,886 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 05:36:40,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:40,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376209527] [2023-11-29 05:36:40,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376209527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:36:40,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:36:40,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:36:40,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228869997] [2023-11-29 05:36:40,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:36:40,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:36:40,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:40,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:36:40,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:36:40,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-29 05:36:40,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 351 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:40,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:40,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-29 05:36:40,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:41,270 INFO L124 PetriNetUnfolderBase]: 712/1388 cut-off events. [2023-11-29 05:36:41,270 INFO L125 PetriNetUnfolderBase]: For 2394/2394 co-relation queries the response was YES. [2023-11-29 05:36:41,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4739 conditions, 1388 events. 712/1388 cut-off events. For 2394/2394 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8390 event pairs, 381 based on Foata normal form. 56/1180 useless extension candidates. Maximal degree in co-relation 4704. Up to 888 conditions per place. [2023-11-29 05:36:41,286 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 79 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2023-11-29 05:36:41,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 711 flow [2023-11-29 05:36:41,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:36:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:36:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2023-11-29 05:36:41,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5867346938775511 [2023-11-29 05:36:41,288 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 115 transitions. [2023-11-29 05:36:41,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 115 transitions. [2023-11-29 05:36:41,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:41,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 115 transitions. [2023-11-29 05:36:41,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:41,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:41,289 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 49.0) internal successors, (245), 5 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:41,289 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 351 flow. Second operand 4 states and 115 transitions. [2023-11-29 05:36:41,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 711 flow [2023-11-29 05:36:41,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 97 transitions, 693 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:36:41,295 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 366 flow [2023-11-29 05:36:41,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=366, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2023-11-29 05:36:41,296 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 30 predicate places. [2023-11-29 05:36:41,296 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 366 flow [2023-11-29 05:36:41,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:41,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:41,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:41,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 05:36:41,297 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:41,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:41,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1178582658, now seen corresponding path program 1 times [2023-11-29 05:36:41,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:41,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411865557] [2023-11-29 05:36:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:41,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:41,405 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 05:36:41,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:41,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411865557] [2023-11-29 05:36:41,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411865557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:36:41,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:36:41,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:36:41,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104150242] [2023-11-29 05:36:41,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:36:41,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:36:41,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:41,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:36:41,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:36:41,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 05:36:41,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 65 transitions, 366 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:41,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:41,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 05:36:41,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:41,826 INFO L124 PetriNetUnfolderBase]: 832/1751 cut-off events. [2023-11-29 05:36:41,826 INFO L125 PetriNetUnfolderBase]: For 3138/3138 co-relation queries the response was YES. [2023-11-29 05:36:41,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6026 conditions, 1751 events. 832/1751 cut-off events. For 3138/3138 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11176 event pairs, 168 based on Foata normal form. 0/1633 useless extension candidates. Maximal degree in co-relation 5989. Up to 559 conditions per place. [2023-11-29 05:36:41,847 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 85 selfloop transitions, 14 changer transitions 0/113 dead transitions. [2023-11-29 05:36:41,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 113 transitions, 848 flow [2023-11-29 05:36:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:36:41,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:36:41,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2023-11-29 05:36:41,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6204081632653061 [2023-11-29 05:36:41,850 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 152 transitions. [2023-11-29 05:36:41,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 152 transitions. [2023-11-29 05:36:41,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:41,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 152 transitions. [2023-11-29 05:36:41,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:41,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:41,852 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:41,852 INFO L175 Difference]: Start difference. First operand has 79 places, 65 transitions, 366 flow. Second operand 5 states and 152 transitions. [2023-11-29 05:36:41,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 113 transitions, 848 flow [2023-11-29 05:36:41,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 113 transitions, 832 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:36:41,859 INFO L231 Difference]: Finished difference. Result has 85 places, 74 transitions, 487 flow [2023-11-29 05:36:41,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=487, PETRI_PLACES=85, PETRI_TRANSITIONS=74} [2023-11-29 05:36:41,860 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 36 predicate places. [2023-11-29 05:36:41,861 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 74 transitions, 487 flow [2023-11-29 05:36:41,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:41,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:41,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:41,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 05:36:41,861 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:41,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:41,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1905178639, now seen corresponding path program 1 times [2023-11-29 05:36:41,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:41,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968839955] [2023-11-29 05:36:41,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:41,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:41,963 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 05:36:41,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:41,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968839955] [2023-11-29 05:36:41,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968839955] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:36:41,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:36:41,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:36:41,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303054971] [2023-11-29 05:36:41,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:36:41,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:36:41,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:41,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:36:41,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:36:41,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 05:36:41,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 74 transitions, 487 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:41,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:41,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 05:36:41,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:42,403 INFO L124 PetriNetUnfolderBase]: 781/1760 cut-off events. [2023-11-29 05:36:42,403 INFO L125 PetriNetUnfolderBase]: For 4833/4833 co-relation queries the response was YES. [2023-11-29 05:36:42,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6405 conditions, 1760 events. 781/1760 cut-off events. For 4833/4833 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11632 event pairs, 113 based on Foata normal form. 66/1817 useless extension candidates. Maximal degree in co-relation 6363. Up to 492 conditions per place. [2023-11-29 05:36:42,423 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 90 selfloop transitions, 21 changer transitions 0/125 dead transitions. [2023-11-29 05:36:42,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 125 transitions, 1055 flow [2023-11-29 05:36:42,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:36:42,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:36:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2023-11-29 05:36:42,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6204081632653061 [2023-11-29 05:36:42,425 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 152 transitions. [2023-11-29 05:36:42,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 152 transitions. [2023-11-29 05:36:42,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:42,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 152 transitions. [2023-11-29 05:36:42,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:42,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:42,427 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:42,427 INFO L175 Difference]: Start difference. First operand has 85 places, 74 transitions, 487 flow. Second operand 5 states and 152 transitions. [2023-11-29 05:36:42,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 125 transitions, 1055 flow [2023-11-29 05:36:42,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 125 transitions, 1055 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:36:42,439 INFO L231 Difference]: Finished difference. Result has 93 places, 87 transitions, 720 flow [2023-11-29 05:36:42,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=720, PETRI_PLACES=93, PETRI_TRANSITIONS=87} [2023-11-29 05:36:42,440 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 44 predicate places. [2023-11-29 05:36:42,440 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 87 transitions, 720 flow [2023-11-29 05:36:42,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:42,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:42,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:42,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 05:36:42,440 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:42,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:42,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1472993893, now seen corresponding path program 1 times [2023-11-29 05:36:42,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:42,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60555224] [2023-11-29 05:36:42,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:42,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:42,555 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 05:36:42,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:42,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60555224] [2023-11-29 05:36:42,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60555224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:36:42,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:36:42,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:36:42,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836941392] [2023-11-29 05:36:42,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:36:42,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:36:42,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:42,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:36:42,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:36:42,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 05:36:42,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 87 transitions, 720 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:42,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:42,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 05:36:42,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:42,934 INFO L124 PetriNetUnfolderBase]: 672/1497 cut-off events. [2023-11-29 05:36:42,935 INFO L125 PetriNetUnfolderBase]: For 5934/5934 co-relation queries the response was YES. [2023-11-29 05:36:42,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5803 conditions, 1497 events. 672/1497 cut-off events. For 5934/5934 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9437 event pairs, 69 based on Foata normal form. 54/1542 useless extension candidates. Maximal degree in co-relation 5755. Up to 532 conditions per place. [2023-11-29 05:36:42,949 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 94 selfloop transitions, 12 changer transitions 1/121 dead transitions. [2023-11-29 05:36:42,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 121 transitions, 1085 flow [2023-11-29 05:36:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:36:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:36:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2023-11-29 05:36:42,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959183673469388 [2023-11-29 05:36:42,950 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 146 transitions. [2023-11-29 05:36:42,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 146 transitions. [2023-11-29 05:36:42,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:42,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 146 transitions. [2023-11-29 05:36:42,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:42,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:42,952 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:42,953 INFO L175 Difference]: Start difference. First operand has 93 places, 87 transitions, 720 flow. Second operand 5 states and 146 transitions. [2023-11-29 05:36:42,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 121 transitions, 1085 flow [2023-11-29 05:36:42,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 121 transitions, 1076 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:36:42,967 INFO L231 Difference]: Finished difference. Result has 94 places, 79 transitions, 616 flow [2023-11-29 05:36:42,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=616, PETRI_PLACES=94, PETRI_TRANSITIONS=79} [2023-11-29 05:36:42,967 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 45 predicate places. [2023-11-29 05:36:42,968 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 79 transitions, 616 flow [2023-11-29 05:36:42,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:42,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:42,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:42,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 05:36:42,968 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:42,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:42,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1472993892, now seen corresponding path program 1 times [2023-11-29 05:36:42,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:42,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346616809] [2023-11-29 05:36:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:42,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:43,070 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 05:36:43,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:43,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346616809] [2023-11-29 05:36:43,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346616809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:36:43,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:36:43,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:36:43,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365178386] [2023-11-29 05:36:43,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:36:43,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:36:43,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:43,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:36:43,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:36:43,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 05:36:43,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 79 transitions, 616 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:43,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:43,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 05:36:43,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:43,328 INFO L124 PetriNetUnfolderBase]: 567/1264 cut-off events. [2023-11-29 05:36:43,328 INFO L125 PetriNetUnfolderBase]: For 4699/4699 co-relation queries the response was YES. [2023-11-29 05:36:43,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 1264 events. 567/1264 cut-off events. For 4699/4699 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7607 event pairs, 49 based on Foata normal form. 50/1313 useless extension candidates. Maximal degree in co-relation 4757. Up to 376 conditions per place. [2023-11-29 05:36:43,352 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 81 selfloop transitions, 11 changer transitions 1/107 dead transitions. [2023-11-29 05:36:43,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 107 transitions, 892 flow [2023-11-29 05:36:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:36:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:36:43,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2023-11-29 05:36:43,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5836734693877551 [2023-11-29 05:36:43,354 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 143 transitions. [2023-11-29 05:36:43,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 143 transitions. [2023-11-29 05:36:43,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:43,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 143 transitions. [2023-11-29 05:36:43,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:43,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:43,356 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:43,356 INFO L175 Difference]: Start difference. First operand has 94 places, 79 transitions, 616 flow. Second operand 5 states and 143 transitions. [2023-11-29 05:36:43,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 107 transitions, 892 flow [2023-11-29 05:36:43,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 107 transitions, 824 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-29 05:36:43,367 INFO L231 Difference]: Finished difference. Result has 88 places, 67 transitions, 433 flow [2023-11-29 05:36:43,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=433, PETRI_PLACES=88, PETRI_TRANSITIONS=67} [2023-11-29 05:36:43,368 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 39 predicate places. [2023-11-29 05:36:43,368 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 67 transitions, 433 flow [2023-11-29 05:36:43,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:43,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:43,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:43,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 05:36:43,369 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:43,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:43,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1474068045, now seen corresponding path program 1 times [2023-11-29 05:36:43,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:43,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521729802] [2023-11-29 05:36:43,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:43,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:43,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:43,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:43,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521729802] [2023-11-29 05:36:43,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521729802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:43,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707118685] [2023-11-29 05:36:43,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:43,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:43,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:43,522 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:43,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:36:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:43,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:36:43,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:43,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:36:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:43,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707118685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:36:43,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:36:43,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 05:36:43,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859235469] [2023-11-29 05:36:43,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:36:43,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:36:43,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:43,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:36:43,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:36:43,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:36:43,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 67 transitions, 433 flow. Second operand has 20 states, 20 states have (on average 12.55) internal successors, (251), 20 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:43,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:43,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:36:43,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:44,553 INFO L124 PetriNetUnfolderBase]: 1032/2164 cut-off events. [2023-11-29 05:36:44,553 INFO L125 PetriNetUnfolderBase]: For 4747/4759 co-relation queries the response was YES. [2023-11-29 05:36:44,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7800 conditions, 2164 events. 1032/2164 cut-off events. For 4747/4759 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 13948 event pairs, 622 based on Foata normal form. 32/2158 useless extension candidates. Maximal degree in co-relation 7754. Up to 1161 conditions per place. [2023-11-29 05:36:44,570 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 86 selfloop transitions, 17 changer transitions 12/133 dead transitions. [2023-11-29 05:36:44,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 133 transitions, 1073 flow [2023-11-29 05:36:44,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:36:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:36:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2023-11-29 05:36:44,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2023-11-29 05:36:44,573 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 189 transitions. [2023-11-29 05:36:44,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 189 transitions. [2023-11-29 05:36:44,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:44,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 189 transitions. [2023-11-29 05:36:44,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 18.9) internal successors, (189), 10 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:44,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:44,575 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:44,576 INFO L175 Difference]: Start difference. First operand has 88 places, 67 transitions, 433 flow. Second operand 10 states and 189 transitions. [2023-11-29 05:36:44,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 133 transitions, 1073 flow [2023-11-29 05:36:44,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 133 transitions, 1023 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:36:44,585 INFO L231 Difference]: Finished difference. Result has 97 places, 73 transitions, 517 flow [2023-11-29 05:36:44,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=517, PETRI_PLACES=97, PETRI_TRANSITIONS=73} [2023-11-29 05:36:44,586 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 48 predicate places. [2023-11-29 05:36:44,586 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 73 transitions, 517 flow [2023-11-29 05:36:44,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.55) internal successors, (251), 20 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:44,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:44,587 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2023-11-29 05:36:44,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:36:44,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:36:44,787 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:44,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:44,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1034101585, now seen corresponding path program 2 times [2023-11-29 05:36:44,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:44,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196227900] [2023-11-29 05:36:44,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:44,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:44,922 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 05:36:44,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:44,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196227900] [2023-11-29 05:36:44,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196227900] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:44,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769811833] [2023-11-29 05:36:44,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:36:44,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:44,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:44,924 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:44,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:36:45,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:36:45,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:36:45,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:36:45,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:45,076 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 05:36:45,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:36:45,103 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 05:36:45,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769811833] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:36:45,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:36:45,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 2, 2] total 12 [2023-11-29 05:36:45,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021144300] [2023-11-29 05:36:45,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:36:45,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:36:45,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:45,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:36:45,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:36:45,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2023-11-29 05:36:45,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 73 transitions, 517 flow. Second operand has 14 states, 14 states have (on average 16.142857142857142) internal successors, (226), 14 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:45,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:45,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2023-11-29 05:36:45,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:45,474 INFO L124 PetriNetUnfolderBase]: 702/1630 cut-off events. [2023-11-29 05:36:45,474 INFO L125 PetriNetUnfolderBase]: For 4934/4999 co-relation queries the response was YES. [2023-11-29 05:36:45,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6186 conditions, 1630 events. 702/1630 cut-off events. For 4934/4999 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10807 event pairs, 496 based on Foata normal form. 25/1612 useless extension candidates. Maximal degree in co-relation 6121. Up to 1152 conditions per place. [2023-11-29 05:36:45,488 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 33 selfloop transitions, 18 changer transitions 0/75 dead transitions. [2023-11-29 05:36:45,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 75 transitions, 635 flow [2023-11-29 05:36:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:36:45,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:36:45,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 248 transitions. [2023-11-29 05:36:45,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36151603498542273 [2023-11-29 05:36:45,490 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 248 transitions. [2023-11-29 05:36:45,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 248 transitions. [2023-11-29 05:36:45,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:45,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 248 transitions. [2023-11-29 05:36:45,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 17.714285714285715) internal successors, (248), 14 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:45,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:45,494 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:45,494 INFO L175 Difference]: Start difference. First operand has 97 places, 73 transitions, 517 flow. Second operand 14 states and 248 transitions. [2023-11-29 05:36:45,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 75 transitions, 635 flow [2023-11-29 05:36:45,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 75 transitions, 602 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-29 05:36:45,503 INFO L231 Difference]: Finished difference. Result has 101 places, 75 transitions, 536 flow [2023-11-29 05:36:45,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=536, PETRI_PLACES=101, PETRI_TRANSITIONS=75} [2023-11-29 05:36:45,504 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 52 predicate places. [2023-11-29 05:36:45,504 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 75 transitions, 536 flow [2023-11-29 05:36:45,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.142857142857142) internal successors, (226), 14 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:45,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:45,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:45,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:36:45,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:36:45,706 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:45,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:45,707 INFO L85 PathProgramCache]: Analyzing trace with hash 185115541, now seen corresponding path program 1 times [2023-11-29 05:36:45,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:45,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548993105] [2023-11-29 05:36:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:45,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:45,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:45,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548993105] [2023-11-29 05:36:45,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548993105] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:45,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263683128] [2023-11-29 05:36:45,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:45,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:45,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:45,844 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:45,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:36:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:45,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:36:45,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:46,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:36:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:46,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263683128] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:36:46,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:36:46,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 05:36:46,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525013898] [2023-11-29 05:36:46,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:36:46,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:36:46,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:46,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:36:46,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:36:46,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:36:46,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 75 transitions, 536 flow. Second operand has 20 states, 20 states have (on average 12.65) internal successors, (253), 20 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:46,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:46,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:36:46,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:46,867 INFO L124 PetriNetUnfolderBase]: 915/1785 cut-off events. [2023-11-29 05:36:46,867 INFO L125 PetriNetUnfolderBase]: For 5138/5214 co-relation queries the response was YES. [2023-11-29 05:36:46,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6855 conditions, 1785 events. 915/1785 cut-off events. For 5138/5214 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10416 event pairs, 596 based on Foata normal form. 34/1790 useless extension candidates. Maximal degree in co-relation 5095. Up to 1190 conditions per place. [2023-11-29 05:36:46,883 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 38 selfloop transitions, 12 changer transitions 52/120 dead transitions. [2023-11-29 05:36:46,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 120 transitions, 1040 flow [2023-11-29 05:36:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:36:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:36:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2023-11-29 05:36:46,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2023-11-29 05:36:46,885 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 180 transitions. [2023-11-29 05:36:46,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 180 transitions. [2023-11-29 05:36:46,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:46,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 180 transitions. [2023-11-29 05:36:46,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 18.0) internal successors, (180), 10 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 05:36:46,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:46,887 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:46,887 INFO L175 Difference]: Start difference. First operand has 101 places, 75 transitions, 536 flow. Second operand 10 states and 180 transitions. [2023-11-29 05:36:46,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 120 transitions, 1040 flow [2023-11-29 05:36:46,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 120 transitions, 964 flow, removed 6 selfloop flow, removed 13 redundant places. [2023-11-29 05:36:46,897 INFO L231 Difference]: Finished difference. Result has 101 places, 68 transitions, 423 flow [2023-11-29 05:36:46,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=423, PETRI_PLACES=101, PETRI_TRANSITIONS=68} [2023-11-29 05:36:46,897 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 52 predicate places. [2023-11-29 05:36:46,898 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 68 transitions, 423 flow [2023-11-29 05:36:46,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.65) internal successors, (253), 20 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:46,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:46,898 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:46,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:36:47,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:47,101 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:47,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:47,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1373658736, now seen corresponding path program 2 times [2023-11-29 05:36:47,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:47,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448875891] [2023-11-29 05:36:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:47,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:47,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:47,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448875891] [2023-11-29 05:36:47,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448875891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:47,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405288111] [2023-11-29 05:36:47,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:36:47,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:47,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:47,454 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:47,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:36:47,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:36:47,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:36:47,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 05:36:47,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:47,654 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 05:36:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:48,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:36:48,440 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 05:36:48,445 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 05:36:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:48,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405288111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:36:48,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:36:48,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2023-11-29 05:36:48,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921659820] [2023-11-29 05:36:48,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:36:48,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 05:36:48,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:48,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 05:36:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:36:49,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:36:49,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 68 transitions, 423 flow. Second operand has 30 states, 30 states have (on average 12.4) internal successors, (372), 30 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:49,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:49,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:36:49,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:52,293 INFO L124 PetriNetUnfolderBase]: 2875/5439 cut-off events. [2023-11-29 05:36:52,293 INFO L125 PetriNetUnfolderBase]: For 14725/14973 co-relation queries the response was YES. [2023-11-29 05:36:52,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20757 conditions, 5439 events. 2875/5439 cut-off events. For 14725/14973 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 38708 event pairs, 355 based on Foata normal form. 160/5507 useless extension candidates. Maximal degree in co-relation 7715. Up to 825 conditions per place. [2023-11-29 05:36:52,329 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 364 selfloop transitions, 57 changer transitions 5/444 dead transitions. [2023-11-29 05:36:52,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 444 transitions, 3701 flow [2023-11-29 05:36:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 05:36:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-29 05:36:52,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 699 transitions. [2023-11-29 05:36:52,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075801749271137 [2023-11-29 05:36:52,333 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 699 transitions. [2023-11-29 05:36:52,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 699 transitions. [2023-11-29 05:36:52,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:52,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 699 transitions. [2023-11-29 05:36:52,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 19.97142857142857) internal successors, (699), 35 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:52,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 49.0) internal successors, (1764), 36 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:52,339 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 49.0) internal successors, (1764), 36 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:52,339 INFO L175 Difference]: Start difference. First operand has 101 places, 68 transitions, 423 flow. Second operand 35 states and 699 transitions. [2023-11-29 05:36:52,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 444 transitions, 3701 flow [2023-11-29 05:36:52,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 444 transitions, 3363 flow, removed 157 selfloop flow, removed 13 redundant places. [2023-11-29 05:36:52,360 INFO L231 Difference]: Finished difference. Result has 122 places, 103 transitions, 777 flow [2023-11-29 05:36:52,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=777, PETRI_PLACES=122, PETRI_TRANSITIONS=103} [2023-11-29 05:36:52,361 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 73 predicate places. [2023-11-29 05:36:52,361 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 103 transitions, 777 flow [2023-11-29 05:36:52,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 12.4) internal successors, (372), 30 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:52,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:52,362 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:52,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:36:52,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:52,564 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:52,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:52,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1373658735, now seen corresponding path program 1 times [2023-11-29 05:36:52,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:52,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077999966] [2023-11-29 05:36:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:52,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:52,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:52,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077999966] [2023-11-29 05:36:52,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077999966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:52,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934651028] [2023-11-29 05:36:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:52,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:52,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:52,835 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:52,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:36:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:52,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 05:36:52,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:52,997 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 19 treesize of output 1 [2023-11-29 05:36:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:53,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:36:53,182 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 16 treesize of output 14 [2023-11-29 05:36:53,184 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 20 treesize of output 16 [2023-11-29 05:36:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:53,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934651028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:36:53,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:36:53,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-29 05:36:53,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194592806] [2023-11-29 05:36:53,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:36:53,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:36:53,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:53,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:36:53,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:36:53,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:36:53,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 103 transitions, 777 flow. Second operand has 23 states, 23 states have (on average 13.434782608695652) internal successors, (309), 23 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:53,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:53,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:36:53,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:54,520 INFO L124 PetriNetUnfolderBase]: 2636/5387 cut-off events. [2023-11-29 05:36:54,520 INFO L125 PetriNetUnfolderBase]: For 18285/18431 co-relation queries the response was YES. [2023-11-29 05:36:54,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21077 conditions, 5387 events. 2636/5387 cut-off events. For 18285/18431 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 40530 event pairs, 640 based on Foata normal form. 182/5474 useless extension candidates. Maximal degree in co-relation 18072. Up to 1412 conditions per place. [2023-11-29 05:36:54,557 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 110 selfloop transitions, 42 changer transitions 0/173 dead transitions. [2023-11-29 05:36:54,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 173 transitions, 1494 flow [2023-11-29 05:36:54,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:36:54,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:36:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 241 transitions. [2023-11-29 05:36:54,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783359497645212 [2023-11-29 05:36:54,558 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 241 transitions. [2023-11-29 05:36:54,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 241 transitions. [2023-11-29 05:36:54,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:54,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 241 transitions. [2023-11-29 05:36:54,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:54,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 49.0) internal successors, (686), 14 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:54,561 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 49.0) internal successors, (686), 14 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:54,561 INFO L175 Difference]: Start difference. First operand has 122 places, 103 transitions, 777 flow. Second operand 13 states and 241 transitions. [2023-11-29 05:36:54,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 173 transitions, 1494 flow [2023-11-29 05:36:54,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 173 transitions, 1373 flow, removed 22 selfloop flow, removed 13 redundant places. [2023-11-29 05:36:54,598 INFO L231 Difference]: Finished difference. Result has 123 places, 105 transitions, 803 flow [2023-11-29 05:36:54,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=803, PETRI_PLACES=123, PETRI_TRANSITIONS=105} [2023-11-29 05:36:54,599 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 74 predicate places. [2023-11-29 05:36:54,599 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 105 transitions, 803 flow [2023-11-29 05:36:54,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 13.434782608695652) internal successors, (309), 23 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:54,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:54,600 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:54,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:36:54,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:54,800 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:54,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:54,800 INFO L85 PathProgramCache]: Analyzing trace with hash -586153448, now seen corresponding path program 2 times [2023-11-29 05:36:54,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:54,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751247425] [2023-11-29 05:36:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:54,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:55,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:55,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751247425] [2023-11-29 05:36:55,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751247425] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:55,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146291263] [2023-11-29 05:36:55,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:36:55,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:55,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:55,136 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:55,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:36:55,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:36:55,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:36:55,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:36:55,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:55,289 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 19 treesize of output 1 [2023-11-29 05:36:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:55,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:36:55,485 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 05:36:55,488 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 24 treesize of output 20 [2023-11-29 05:36:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:55,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146291263] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:36:55,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:36:55,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-29 05:36:55,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242998707] [2023-11-29 05:36:55,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:36:55,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:36:55,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:55,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:36:55,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:36:55,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:36:55,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 105 transitions, 803 flow. Second operand has 23 states, 23 states have (on average 13.695652173913043) internal successors, (315), 23 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 05:36:55,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:55,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:36:55,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:57,088 INFO L124 PetriNetUnfolderBase]: 3962/7907 cut-off events. [2023-11-29 05:36:57,088 INFO L125 PetriNetUnfolderBase]: For 38537/38882 co-relation queries the response was YES. [2023-11-29 05:36:57,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32568 conditions, 7907 events. 3962/7907 cut-off events. For 38537/38882 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 61505 event pairs, 830 based on Foata normal form. 281/8056 useless extension candidates. Maximal degree in co-relation 27745. Up to 2034 conditions per place. [2023-11-29 05:36:57,141 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 262 selfloop transitions, 21 changer transitions 0/310 dead transitions. [2023-11-29 05:36:57,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 310 transitions, 3440 flow [2023-11-29 05:36:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:36:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:36:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 242 transitions. [2023-11-29 05:36:57,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37990580847723704 [2023-11-29 05:36:57,143 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 242 transitions. [2023-11-29 05:36:57,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 242 transitions. [2023-11-29 05:36:57,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:57,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 242 transitions. [2023-11-29 05:36:57,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 18.615384615384617) internal successors, (242), 13 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:57,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 49.0) internal successors, (686), 14 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:57,145 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 49.0) internal successors, (686), 14 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:57,145 INFO L175 Difference]: Start difference. First operand has 123 places, 105 transitions, 803 flow. Second operand 13 states and 242 transitions. [2023-11-29 05:36:57,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 310 transitions, 3440 flow [2023-11-29 05:36:57,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 310 transitions, 3253 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-11-29 05:36:57,193 INFO L231 Difference]: Finished difference. Result has 126 places, 110 transitions, 850 flow [2023-11-29 05:36:57,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=850, PETRI_PLACES=126, PETRI_TRANSITIONS=110} [2023-11-29 05:36:57,194 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 77 predicate places. [2023-11-29 05:36:57,194 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 110 transitions, 850 flow [2023-11-29 05:36:57,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 13.695652173913043) internal successors, (315), 23 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 05:36:57,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:57,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:57,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:36:57,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:57,395 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:57,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash -586153449, now seen corresponding path program 1 times [2023-11-29 05:36:57,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:57,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811515690] [2023-11-29 05:36:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:57,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:57,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:57,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811515690] [2023-11-29 05:36:57,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811515690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:57,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730982482] [2023-11-29 05:36:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:57,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:57,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:57,702 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:57,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:36:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:57,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:36:57,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:57,840 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 19 treesize of output 1 [2023-11-29 05:36:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:57,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:36:58,005 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 16 treesize of output 14 [2023-11-29 05:36:58,008 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 20 treesize of output 16 [2023-11-29 05:36:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:36:58,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730982482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:36:58,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:36:58,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-29 05:36:58,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462084822] [2023-11-29 05:36:58,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:36:58,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 05:36:58,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:58,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 05:36:58,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:36:58,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:36:58,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 110 transitions, 850 flow. Second operand has 23 states, 23 states have (on average 13.695652173913043) internal successors, (315), 23 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 05:36:58,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:58,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:36:58,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:59,492 INFO L124 PetriNetUnfolderBase]: 3767/7569 cut-off events. [2023-11-29 05:36:59,493 INFO L125 PetriNetUnfolderBase]: For 39807/40132 co-relation queries the response was YES. [2023-11-29 05:36:59,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32614 conditions, 7569 events. 3767/7569 cut-off events. For 39807/40132 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 58789 event pairs, 830 based on Foata normal form. 269/7676 useless extension candidates. Maximal degree in co-relation 27867. Up to 1716 conditions per place. [2023-11-29 05:36:59,544 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 261 selfloop transitions, 21 changer transitions 0/309 dead transitions. [2023-11-29 05:36:59,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 309 transitions, 3311 flow [2023-11-29 05:36:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:36:59,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:36:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 241 transitions. [2023-11-29 05:36:59,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783359497645212 [2023-11-29 05:36:59,545 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 241 transitions. [2023-11-29 05:36:59,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 241 transitions. [2023-11-29 05:36:59,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:59,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 241 transitions. [2023-11-29 05:36:59,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:59,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 49.0) internal successors, (686), 14 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:59,548 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 49.0) internal successors, (686), 14 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:59,548 INFO L175 Difference]: Start difference. First operand has 126 places, 110 transitions, 850 flow. Second operand 13 states and 241 transitions. [2023-11-29 05:36:59,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 309 transitions, 3311 flow [2023-11-29 05:36:59,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 309 transitions, 3272 flow, removed 4 selfloop flow, removed 9 redundant places. [2023-11-29 05:36:59,582 INFO L231 Difference]: Finished difference. Result has 129 places, 109 transitions, 845 flow [2023-11-29 05:36:59,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=845, PETRI_PLACES=129, PETRI_TRANSITIONS=109} [2023-11-29 05:36:59,583 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 80 predicate places. [2023-11-29 05:36:59,583 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 109 transitions, 845 flow [2023-11-29 05:36:59,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 13.695652173913043) internal successors, (315), 23 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 05:36:59,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:59,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:59,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:36:59,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 05:36:59,784 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:36:59,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:59,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1823933047, now seen corresponding path program 1 times [2023-11-29 05:36:59,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:59,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721985377] [2023-11-29 05:36:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:59,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:59,846 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 05:36:59,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:59,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721985377] [2023-11-29 05:36:59,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721985377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:59,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271439652] [2023-11-29 05:36:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:59,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:59,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:59,849 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:59,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:36:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:59,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:36:59,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:59,995 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 05:36:59,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:37:00,030 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 05:37:00,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271439652] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:37:00,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:37:00,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 05:37:00,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348689618] [2023-11-29 05:37:00,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:37:00,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:37:00,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:37:00,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:37:00,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:37:00,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-29 05:37:00,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 109 transitions, 845 flow. Second operand has 12 states, 12 states have (on average 15.916666666666666) internal successors, (191), 12 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:00,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:37:00,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-29 05:37:00,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:37:02,068 INFO L124 PetriNetUnfolderBase]: 5838/11883 cut-off events. [2023-11-29 05:37:02,068 INFO L125 PetriNetUnfolderBase]: For 59325/59574 co-relation queries the response was YES. [2023-11-29 05:37:02,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52207 conditions, 11883 events. 5838/11883 cut-off events. For 59325/59574 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 95874 event pairs, 1089 based on Foata normal form. 461/12218 useless extension candidates. Maximal degree in co-relation 38080. Up to 3319 conditions per place. [2023-11-29 05:37:02,175 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 281 selfloop transitions, 52 changer transitions 0/354 dead transitions. [2023-11-29 05:37:02,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 354 transitions, 3601 flow [2023-11-29 05:37:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:37:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:37:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 355 transitions. [2023-11-29 05:37:02,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174927113702624 [2023-11-29 05:37:02,177 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 355 transitions. [2023-11-29 05:37:02,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 355 transitions. [2023-11-29 05:37:02,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:37:02,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 355 transitions. [2023-11-29 05:37:02,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 25.357142857142858) internal successors, (355), 14 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:02,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:02,180 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:02,180 INFO L175 Difference]: Start difference. First operand has 129 places, 109 transitions, 845 flow. Second operand 14 states and 355 transitions. [2023-11-29 05:37:02,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 354 transitions, 3601 flow [2023-11-29 05:37:02,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 354 transitions, 3464 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-11-29 05:37:02,287 INFO L231 Difference]: Finished difference. Result has 135 places, 137 transitions, 1207 flow [2023-11-29 05:37:02,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1207, PETRI_PLACES=135, PETRI_TRANSITIONS=137} [2023-11-29 05:37:02,288 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 86 predicate places. [2023-11-29 05:37:02,288 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 137 transitions, 1207 flow [2023-11-29 05:37:02,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.916666666666666) internal successors, (191), 12 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:02,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:37:02,289 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:37:02,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:37:02,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 05:37:02,489 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:37:02,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:37:02,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1240392018, now seen corresponding path program 1 times [2023-11-29 05:37:02,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:37:02,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465210721] [2023-11-29 05:37:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:02,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:37:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:02,561 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 05:37:02,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:37:02,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465210721] [2023-11-29 05:37:02,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465210721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:37:02,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077838774] [2023-11-29 05:37:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:02,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:02,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:37:02,563 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:37:02,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:37:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:02,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:37:02,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:37:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 05:37:02,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:37:02,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077838774] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:37:02,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:37:02,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 05:37:02,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038686703] [2023-11-29 05:37:02,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:37:02,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:37:02,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:37:02,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:37:02,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:37:02,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-29 05:37:02,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 137 transitions, 1207 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:02,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:37:02,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-29 05:37:02,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:37:04,495 INFO L124 PetriNetUnfolderBase]: 5893/11704 cut-off events. [2023-11-29 05:37:04,495 INFO L125 PetriNetUnfolderBase]: For 74515/75401 co-relation queries the response was YES. [2023-11-29 05:37:04,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54012 conditions, 11704 events. 5893/11704 cut-off events. For 74515/75401 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 95261 event pairs, 828 based on Foata normal form. 841/12474 useless extension candidates. Maximal degree in co-relation 41256. Up to 3956 conditions per place. [2023-11-29 05:37:04,580 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 311 selfloop transitions, 11 changer transitions 12/371 dead transitions. [2023-11-29 05:37:04,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 371 transitions, 4551 flow [2023-11-29 05:37:04,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:37:04,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:37:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2023-11-29 05:37:04,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068027210884354 [2023-11-29 05:37:04,581 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 149 transitions. [2023-11-29 05:37:04,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 149 transitions. [2023-11-29 05:37:04,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:37:04,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 149 transitions. [2023-11-29 05:37:04,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:04,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:04,582 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:04,582 INFO L175 Difference]: Start difference. First operand has 135 places, 137 transitions, 1207 flow. Second operand 6 states and 149 transitions. [2023-11-29 05:37:04,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 371 transitions, 4551 flow [2023-11-29 05:37:04,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 371 transitions, 4264 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-29 05:37:04,646 INFO L231 Difference]: Finished difference. Result has 134 places, 136 transitions, 1158 flow [2023-11-29 05:37:04,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1158, PETRI_PLACES=134, PETRI_TRANSITIONS=136} [2023-11-29 05:37:04,647 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 85 predicate places. [2023-11-29 05:37:04,647 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 136 transitions, 1158 flow [2023-11-29 05:37:04,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:04,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:37:04,647 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:37:04,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:37:04,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:04,848 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:37:04,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:37:04,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1654912468, now seen corresponding path program 1 times [2023-11-29 05:37:04,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:37:04,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381053238] [2023-11-29 05:37:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:04,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:37:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 05:37:04,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:37:04,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381053238] [2023-11-29 05:37:04,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381053238] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:37:04,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800729976] [2023-11-29 05:37:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:04,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:04,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:37:04,924 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:37:04,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:37:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:05,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:37:05,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:37:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-29 05:37:05,075 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:37:05,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800729976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:37:05,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:37:05,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 05:37:05,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889694364] [2023-11-29 05:37:05,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:37:05,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:37:05,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:37:05,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:37:05,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:37:05,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-29 05:37:05,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 136 transitions, 1158 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:05,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:37:05,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-29 05:37:05,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:37:06,924 INFO L124 PetriNetUnfolderBase]: 5302/10699 cut-off events. [2023-11-29 05:37:06,924 INFO L125 PetriNetUnfolderBase]: For 58244/58418 co-relation queries the response was YES. [2023-11-29 05:37:06,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49998 conditions, 10699 events. 5302/10699 cut-off events. For 58244/58418 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 84406 event pairs, 953 based on Foata normal form. 342/10943 useless extension candidates. Maximal degree in co-relation 38070. Up to 4260 conditions per place. [2023-11-29 05:37:07,030 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 119 selfloop transitions, 60 changer transitions 2/201 dead transitions. [2023-11-29 05:37:07,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 201 transitions, 2109 flow [2023-11-29 05:37:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:37:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:37:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2023-11-29 05:37:07,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068027210884354 [2023-11-29 05:37:07,031 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 149 transitions. [2023-11-29 05:37:07,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 149 transitions. [2023-11-29 05:37:07,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:37:07,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 149 transitions. [2023-11-29 05:37:07,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:07,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:07,033 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:07,033 INFO L175 Difference]: Start difference. First operand has 134 places, 136 transitions, 1158 flow. Second operand 6 states and 149 transitions. [2023-11-29 05:37:07,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 201 transitions, 2109 flow [2023-11-29 05:37:07,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 201 transitions, 1991 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-11-29 05:37:07,202 INFO L231 Difference]: Finished difference. Result has 127 places, 132 transitions, 1215 flow [2023-11-29 05:37:07,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1095, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1215, PETRI_PLACES=127, PETRI_TRANSITIONS=132} [2023-11-29 05:37:07,202 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 78 predicate places. [2023-11-29 05:37:07,202 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 132 transitions, 1215 flow [2023-11-29 05:37:07,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:07,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:37:07,202 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:37:07,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:37:07,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:07,403 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:37:07,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:37:07,403 INFO L85 PathProgramCache]: Analyzing trace with hash -202552450, now seen corresponding path program 1 times [2023-11-29 05:37:07,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:37:07,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788859882] [2023-11-29 05:37:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:07,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:37:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:07,474 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 05:37:07,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:37:07,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788859882] [2023-11-29 05:37:07,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788859882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:37:07,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65893765] [2023-11-29 05:37:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:07,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:07,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:37:07,476 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:37:07,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:37:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:07,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:37:07,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:37:07,641 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 05:37:07,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:37:07,677 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 05:37:07,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65893765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:37:07,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:37:07,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-29 05:37:07,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724166966] [2023-11-29 05:37:07,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:37:07,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:37:07,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:37:07,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:37:07,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:37:07,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-29 05:37:07,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 132 transitions, 1215 flow. Second operand has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:07,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:37:07,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-29 05:37:07,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:37:10,616 INFO L124 PetriNetUnfolderBase]: 9949/19575 cut-off events. [2023-11-29 05:37:10,616 INFO L125 PetriNetUnfolderBase]: For 116153/117472 co-relation queries the response was YES. [2023-11-29 05:37:10,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87979 conditions, 19575 events. 9949/19575 cut-off events. For 116153/117472 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 165715 event pairs, 2069 based on Foata normal form. 1242/20709 useless extension candidates. Maximal degree in co-relation 65856. Up to 5767 conditions per place. [2023-11-29 05:37:10,771 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 565 selfloop transitions, 16 changer transitions 0/614 dead transitions. [2023-11-29 05:37:10,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 614 transitions, 8079 flow [2023-11-29 05:37:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:37:10,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:37:10,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2023-11-29 05:37:10,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2023-11-29 05:37:10,773 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 259 transitions. [2023-11-29 05:37:10,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 259 transitions. [2023-11-29 05:37:10,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:37:10,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 259 transitions. [2023-11-29 05:37:10,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 25.9) internal successors, (259), 10 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:10,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:10,774 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 49.0) internal successors, (539), 11 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:10,774 INFO L175 Difference]: Start difference. First operand has 127 places, 132 transitions, 1215 flow. Second operand 10 states and 259 transitions. [2023-11-29 05:37:10,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 614 transitions, 8079 flow [2023-11-29 05:37:10,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 614 transitions, 7722 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:37:10,905 INFO L231 Difference]: Finished difference. Result has 136 places, 141 transitions, 1292 flow [2023-11-29 05:37:10,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1292, PETRI_PLACES=136, PETRI_TRANSITIONS=141} [2023-11-29 05:37:10,906 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 87 predicate places. [2023-11-29 05:37:10,906 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 141 transitions, 1292 flow [2023-11-29 05:37:10,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:10,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:37:10,906 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 05:37:10,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:37:11,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 05:37:11,107 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:37:11,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:37:11,107 INFO L85 PathProgramCache]: Analyzing trace with hash 453021436, now seen corresponding path program 2 times [2023-11-29 05:37:11,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:37:11,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177731316] [2023-11-29 05:37:11,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:11,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:37:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:11,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:37:11,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177731316] [2023-11-29 05:37:11,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177731316] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:37:11,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504119950] [2023-11-29 05:37:11,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:37:11,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:11,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:37:11,271 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:37:11,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:37:11,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:37:11,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:37:11,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:37:11,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:37:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:11,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:37:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:11,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504119950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:37:11,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:37:11,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2023-11-29 05:37:11,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957039218] [2023-11-29 05:37:11,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:37:11,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 05:37:11,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:37:11,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 05:37:11,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:37:11,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:37:11,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 141 transitions, 1292 flow. Second operand has 30 states, 30 states have (on average 12.5) internal successors, (375), 30 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:11,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:37:11,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:37:11,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:37:15,490 INFO L124 PetriNetUnfolderBase]: 9562/17656 cut-off events. [2023-11-29 05:37:15,490 INFO L125 PetriNetUnfolderBase]: For 101007/101377 co-relation queries the response was YES. [2023-11-29 05:37:15,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83729 conditions, 17656 events. 9562/17656 cut-off events. For 101007/101377 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 139698 event pairs, 6107 based on Foata normal form. 78/17339 useless extension candidates. Maximal degree in co-relation 70202. Up to 12206 conditions per place. [2023-11-29 05:37:15,634 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 182 selfloop transitions, 23 changer transitions 50/275 dead transitions. [2023-11-29 05:37:15,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 275 transitions, 3046 flow [2023-11-29 05:37:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:37:15,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:37:15,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 256 transitions. [2023-11-29 05:37:15,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37317784256559766 [2023-11-29 05:37:15,636 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 256 transitions. [2023-11-29 05:37:15,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 256 transitions. [2023-11-29 05:37:15,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:37:15,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 256 transitions. [2023-11-29 05:37:15,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 18.285714285714285) internal successors, (256), 14 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:15,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:15,637 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:15,637 INFO L175 Difference]: Start difference. First operand has 136 places, 141 transitions, 1292 flow. Second operand 14 states and 256 transitions. [2023-11-29 05:37:15,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 275 transitions, 3046 flow [2023-11-29 05:37:15,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 275 transitions, 2968 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-11-29 05:37:15,837 INFO L231 Difference]: Finished difference. Result has 143 places, 129 transitions, 1168 flow [2023-11-29 05:37:15,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1168, PETRI_PLACES=143, PETRI_TRANSITIONS=129} [2023-11-29 05:37:15,838 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 94 predicate places. [2023-11-29 05:37:15,838 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 129 transitions, 1168 flow [2023-11-29 05:37:15,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 12.5) internal successors, (375), 30 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:15,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:37:15,839 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:37:15,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 05:37:16,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:16,039 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:37:16,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:37:16,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1379355581, now seen corresponding path program 3 times [2023-11-29 05:37:16,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:37:16,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338870441] [2023-11-29 05:37:16,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:16,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:37:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:16,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:37:16,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338870441] [2023-11-29 05:37:16,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338870441] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:37:16,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971167440] [2023-11-29 05:37:16,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:37:16,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:16,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:37:16,283 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:37:16,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:37:16,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:37:16,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:37:16,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:37:16,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:37:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:16,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:37:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:16,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971167440] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:37:16,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:37:16,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2023-11-29 05:37:16,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689505107] [2023-11-29 05:37:16,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:37:16,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 05:37:16,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:37:16,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 05:37:16,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:37:16,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:37:16,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 129 transitions, 1168 flow. Second operand has 30 states, 30 states have (on average 12.566666666666666) internal successors, (377), 30 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:16,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:37:16,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:37:16,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:37:19,693 INFO L124 PetriNetUnfolderBase]: 8473/15515 cut-off events. [2023-11-29 05:37:19,693 INFO L125 PetriNetUnfolderBase]: For 86015/87072 co-relation queries the response was YES. [2023-11-29 05:37:19,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70876 conditions, 15515 events. 8473/15515 cut-off events. For 86015/87072 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 118788 event pairs, 5859 based on Foata normal form. 350/15631 useless extension candidates. Maximal degree in co-relation 54597. Up to 12128 conditions per place. [2023-11-29 05:37:19,808 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 78 selfloop transitions, 12 changer transitions 101/217 dead transitions. [2023-11-29 05:37:19,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 217 transitions, 2349 flow [2023-11-29 05:37:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:37:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:37:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 244 transitions. [2023-11-29 05:37:19,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3556851311953353 [2023-11-29 05:37:19,809 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 244 transitions. [2023-11-29 05:37:19,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 244 transitions. [2023-11-29 05:37:19,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:37:19,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 244 transitions. [2023-11-29 05:37:19,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 17.428571428571427) internal successors, (244), 14 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:19,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:19,811 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 49.0) internal successors, (735), 15 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:19,811 INFO L175 Difference]: Start difference. First operand has 143 places, 129 transitions, 1168 flow. Second operand 14 states and 244 transitions. [2023-11-29 05:37:19,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 217 transitions, 2349 flow [2023-11-29 05:37:19,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 217 transitions, 2223 flow, removed 0 selfloop flow, removed 13 redundant places. [2023-11-29 05:37:19,898 INFO L231 Difference]: Finished difference. Result has 149 places, 116 transitions, 1035 flow [2023-11-29 05:37:19,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1035, PETRI_PLACES=149, PETRI_TRANSITIONS=116} [2023-11-29 05:37:19,899 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 100 predicate places. [2023-11-29 05:37:19,899 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 116 transitions, 1035 flow [2023-11-29 05:37:19,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 12.566666666666666) internal successors, (377), 30 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:19,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:37:19,900 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 05:37:19,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:37:20,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 05:37:20,100 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:37:20,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:37:20,100 INFO L85 PathProgramCache]: Analyzing trace with hash 432891673, now seen corresponding path program 3 times [2023-11-29 05:37:20,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:37:20,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628985886] [2023-11-29 05:37:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:20,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:37:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:20,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:37:20,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628985886] [2023-11-29 05:37:20,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628985886] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:37:20,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833988390] [2023-11-29 05:37:20,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:37:20,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:20,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:37:20,451 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:37:20,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:37:20,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:37:20,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:37:20,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-29 05:37:20,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:37:20,636 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 05:37:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:20,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:37:20,918 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 16 treesize of output 14 [2023-11-29 05:37:20,920 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 20 treesize of output 16 [2023-11-29 05:37:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:21,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833988390] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:37:21,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:37:21,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2023-11-29 05:37:21,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249689788] [2023-11-29 05:37:21,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:37:21,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 05:37:21,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:37:21,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 05:37:21,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:37:21,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:37:21,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 116 transitions, 1035 flow. Second operand has 29 states, 29 states have (on average 13.344827586206897) internal successors, (387), 29 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:21,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:37:21,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:37:21,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:37:24,362 INFO L124 PetriNetUnfolderBase]: 6751/13320 cut-off events. [2023-11-29 05:37:24,362 INFO L125 PetriNetUnfolderBase]: For 80154/80707 co-relation queries the response was YES. [2023-11-29 05:37:24,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62087 conditions, 13320 events. 6751/13320 cut-off events. For 80154/80707 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 104763 event pairs, 1320 based on Foata normal form. 261/13375 useless extension candidates. Maximal degree in co-relation 45805. Up to 3564 conditions per place. [2023-11-29 05:37:24,488 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 257 selfloop transitions, 44 changer transitions 0/323 dead transitions. [2023-11-29 05:37:24,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 323 transitions, 3709 flow [2023-11-29 05:37:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:37:24,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 05:37:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 353 transitions. [2023-11-29 05:37:24,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3791621911922664 [2023-11-29 05:37:24,490 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 353 transitions. [2023-11-29 05:37:24,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 353 transitions. [2023-11-29 05:37:24,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:37:24,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 353 transitions. [2023-11-29 05:37:24,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 18.57894736842105) internal successors, (353), 19 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:24,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 49.0) internal successors, (980), 20 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:24,494 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 49.0) internal successors, (980), 20 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:24,494 INFO L175 Difference]: Start difference. First operand has 149 places, 116 transitions, 1035 flow. Second operand 19 states and 353 transitions. [2023-11-29 05:37:24,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 323 transitions, 3709 flow [2023-11-29 05:37:24,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 323 transitions, 3521 flow, removed 82 selfloop flow, removed 14 redundant places. [2023-11-29 05:37:24,618 INFO L231 Difference]: Finished difference. Result has 142 places, 119 transitions, 1143 flow [2023-11-29 05:37:24,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1143, PETRI_PLACES=142, PETRI_TRANSITIONS=119} [2023-11-29 05:37:24,619 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 93 predicate places. [2023-11-29 05:37:24,619 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 119 transitions, 1143 flow [2023-11-29 05:37:24,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 13.344827586206897) internal successors, (387), 29 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:24,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:37:24,619 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:37:24,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 05:37:24,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:24,820 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:37:24,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:37:24,820 INFO L85 PathProgramCache]: Analyzing trace with hash 750778656, now seen corresponding path program 4 times [2023-11-29 05:37:24,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:37:24,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770343969] [2023-11-29 05:37:24,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:24,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:37:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:25,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:37:25,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770343969] [2023-11-29 05:37:25,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770343969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:37:25,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677888051] [2023-11-29 05:37:25,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:37:25,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:25,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:37:25,250 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:37:25,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 05:37:25,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:37:25,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:37:25,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 05:37:25,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:37:25,450 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 19 treesize of output 1 [2023-11-29 05:37:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:25,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:37:25,806 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 05:37:25,809 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 24 treesize of output 20 [2023-11-29 05:37:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:25,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677888051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:37:25,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:37:25,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2023-11-29 05:37:25,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510329168] [2023-11-29 05:37:25,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:37:25,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 05:37:25,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:37:25,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 05:37:25,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 05:37:26,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:37:26,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 119 transitions, 1143 flow. Second operand has 33 states, 33 states have (on average 13.575757575757576) internal successors, (448), 33 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 05:37:26,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:37:26,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:37:26,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:37:28,964 INFO L124 PetriNetUnfolderBase]: 6402/12487 cut-off events. [2023-11-29 05:37:28,964 INFO L125 PetriNetUnfolderBase]: For 99918/100710 co-relation queries the response was YES. [2023-11-29 05:37:29,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61322 conditions, 12487 events. 6402/12487 cut-off events. For 99918/100710 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 96406 event pairs, 1169 based on Foata normal form. 351/12650 useless extension candidates. Maximal degree in co-relation 45203. Up to 2942 conditions per place. [2023-11-29 05:37:29,067 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 456 selfloop transitions, 28 changer transitions 0/511 dead transitions. [2023-11-29 05:37:29,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 511 transitions, 7020 flow [2023-11-29 05:37:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:37:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-29 05:37:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 353 transitions. [2023-11-29 05:37:29,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3791621911922664 [2023-11-29 05:37:29,069 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 353 transitions. [2023-11-29 05:37:29,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 353 transitions. [2023-11-29 05:37:29,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:37:29,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 353 transitions. [2023-11-29 05:37:29,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 18.57894736842105) internal successors, (353), 19 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:29,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 49.0) internal successors, (980), 20 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:29,071 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 49.0) internal successors, (980), 20 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:29,071 INFO L175 Difference]: Start difference. First operand has 142 places, 119 transitions, 1143 flow. Second operand 19 states and 353 transitions. [2023-11-29 05:37:29,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 511 transitions, 7020 flow [2023-11-29 05:37:29,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 511 transitions, 6253 flow, removed 22 selfloop flow, removed 16 redundant places. [2023-11-29 05:37:29,176 INFO L231 Difference]: Finished difference. Result has 146 places, 121 transitions, 1128 flow [2023-11-29 05:37:29,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1128, PETRI_PLACES=146, PETRI_TRANSITIONS=121} [2023-11-29 05:37:29,177 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 97 predicate places. [2023-11-29 05:37:29,177 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 121 transitions, 1128 flow [2023-11-29 05:37:29,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 13.575757575757576) internal successors, (448), 33 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 05:37:29,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:37:29,177 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:37:29,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 05:37:29,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 05:37:29,377 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:37:29,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:37:29,378 INFO L85 PathProgramCache]: Analyzing trace with hash 750778655, now seen corresponding path program 2 times [2023-11-29 05:37:29,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:37:29,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318002968] [2023-11-29 05:37:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:29,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:37:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:29,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:37:29,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318002968] [2023-11-29 05:37:29,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318002968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:37:29,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979635243] [2023-11-29 05:37:29,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:37:29,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:29,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:37:29,798 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:37:29,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 05:37:29,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:37:29,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:37:29,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 05:37:29,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:37:30,074 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 05:37:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:30,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:37:31,104 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 05:37:31,108 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 05:37:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:31,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979635243] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:37:31,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:37:31,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 40 [2023-11-29 05:37:31,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236936061] [2023-11-29 05:37:31,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:37:31,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 05:37:31,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:37:31,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 05:37:31,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1579, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 05:37:32,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:37:32,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 121 transitions, 1128 flow. Second operand has 42 states, 42 states have (on average 12.571428571428571) internal successors, (528), 42 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:32,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:37:32,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:37:32,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:37:39,200 INFO L124 PetriNetUnfolderBase]: 10865/20170 cut-off events. [2023-11-29 05:37:39,200 INFO L125 PetriNetUnfolderBase]: For 142120/143550 co-relation queries the response was YES. [2023-11-29 05:37:39,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98704 conditions, 20170 events. 10865/20170 cut-off events. For 142120/143550 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 162884 event pairs, 1351 based on Foata normal form. 813/20824 useless extension candidates. Maximal degree in co-relation 74680. Up to 2819 conditions per place. [2023-11-29 05:37:39,408 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 824 selfloop transitions, 83 changer transitions 20/953 dead transitions. [2023-11-29 05:37:39,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 953 transitions, 11417 flow [2023-11-29 05:37:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 05:37:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-29 05:37:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 876 transitions. [2023-11-29 05:37:39,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39727891156462586 [2023-11-29 05:37:39,412 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 876 transitions. [2023-11-29 05:37:39,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 876 transitions. [2023-11-29 05:37:39,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:37:39,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 876 transitions. [2023-11-29 05:37:39,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 19.466666666666665) internal successors, (876), 45 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:39,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 49.0) internal successors, (2254), 46 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:39,419 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 49.0) internal successors, (2254), 46 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:39,419 INFO L175 Difference]: Start difference. First operand has 146 places, 121 transitions, 1128 flow. Second operand 45 states and 876 transitions. [2023-11-29 05:37:39,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 953 transitions, 11417 flow [2023-11-29 05:37:39,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 953 transitions, 11187 flow, removed 9 selfloop flow, removed 19 redundant places. [2023-11-29 05:37:39,653 INFO L231 Difference]: Finished difference. Result has 177 places, 172 transitions, 1699 flow [2023-11-29 05:37:39,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1699, PETRI_PLACES=177, PETRI_TRANSITIONS=172} [2023-11-29 05:37:39,654 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 128 predicate places. [2023-11-29 05:37:39,654 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 172 transitions, 1699 flow [2023-11-29 05:37:39,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 12.571428571428571) internal successors, (528), 42 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:39,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:37:39,654 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 05:37:39,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 05:37:39,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 05:37:39,855 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:37:39,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:37:39,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2042543579, now seen corresponding path program 3 times [2023-11-29 05:37:39,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:37:39,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522386562] [2023-11-29 05:37:39,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:39,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:37:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:40,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:37:40,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522386562] [2023-11-29 05:37:40,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522386562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:37:40,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894288744] [2023-11-29 05:37:40,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:37:40,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:40,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:37:40,469 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:37:40,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 05:37:40,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 05:37:40,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:37:40,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 05:37:40,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:37:40,706 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 05:37:40,740 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2023-11-29 05:37:40,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2023-11-29 05:37:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:37:40,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:37:41,102 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 18 treesize of output 16 [2023-11-29 05:37:41,104 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 24 treesize of output 20 [2023-11-29 05:37:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 05:37:41,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894288744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:37:41,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:37:41,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2023-11-29 05:37:41,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993446389] [2023-11-29 05:37:41,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:37:41,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 05:37:41,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:37:41,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 05:37:41,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2023-11-29 05:37:41,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:37:41,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 172 transitions, 1699 flow. Second operand has 31 states, 31 states have (on average 13.419354838709678) internal successors, (416), 31 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:41,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:37:41,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:37:41,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:37:45,074 INFO L124 PetriNetUnfolderBase]: 8780/17645 cut-off events. [2023-11-29 05:37:45,074 INFO L125 PetriNetUnfolderBase]: For 121417/122341 co-relation queries the response was YES. [2023-11-29 05:37:45,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87374 conditions, 17645 events. 8780/17645 cut-off events. For 121417/122341 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 146476 event pairs, 1671 based on Foata normal form. 428/17804 useless extension candidates. Maximal degree in co-relation 72699. Up to 4589 conditions per place. [2023-11-29 05:37:45,228 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 630 selfloop transitions, 46 changer transitions 0/711 dead transitions. [2023-11-29 05:37:45,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 711 transitions, 9302 flow [2023-11-29 05:37:45,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:37:45,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 05:37:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 367 transitions. [2023-11-29 05:37:45,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37448979591836734 [2023-11-29 05:37:45,230 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 367 transitions. [2023-11-29 05:37:45,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 367 transitions. [2023-11-29 05:37:45,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:37:45,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 367 transitions. [2023-11-29 05:37:45,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 18.35) internal successors, (367), 20 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:45,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 49.0) internal successors, (1029), 21 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:45,233 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 49.0) internal successors, (1029), 21 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:45,233 INFO L175 Difference]: Start difference. First operand has 177 places, 172 transitions, 1699 flow. Second operand 20 states and 367 transitions. [2023-11-29 05:37:45,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 711 transitions, 9302 flow [2023-11-29 05:37:45,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 711 transitions, 8323 flow, removed 242 selfloop flow, removed 18 redundant places. [2023-11-29 05:37:45,458 INFO L231 Difference]: Finished difference. Result has 178 places, 171 transitions, 1638 flow [2023-11-29 05:37:45,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1546, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1638, PETRI_PLACES=178, PETRI_TRANSITIONS=171} [2023-11-29 05:37:45,458 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 129 predicate places. [2023-11-29 05:37:45,458 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 171 transitions, 1638 flow [2023-11-29 05:37:45,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 13.419354838709678) internal successors, (416), 31 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:45,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:37:45,459 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-11-29 05:37:45,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 05:37:45,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 05:37:45,659 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:37:45,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:37:45,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1764356476, now seen corresponding path program 4 times [2023-11-29 05:37:45,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:37:45,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716220145] [2023-11-29 05:37:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:45,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:37:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:45,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:37:45,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716220145] [2023-11-29 05:37:45,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716220145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:37:45,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357544639] [2023-11-29 05:37:45,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:37:45,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:45,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:37:45,905 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:37:45,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 05:37:46,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:37:46,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:37:46,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:37:46,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:37:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:46,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:37:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:46,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357544639] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:37:46,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:37:46,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 39 [2023-11-29 05:37:46,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93250745] [2023-11-29 05:37:46,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:37:46,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 05:37:46,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:37:46,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 05:37:46,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 05:37:46,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:37:46,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 171 transitions, 1638 flow. Second operand has 40 states, 40 states have (on average 12.475) internal successors, (499), 40 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:46,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:37:46,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:37:46,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:37:50,054 INFO L124 PetriNetUnfolderBase]: 8716/16605 cut-off events. [2023-11-29 05:37:50,054 INFO L125 PetriNetUnfolderBase]: For 104988/105864 co-relation queries the response was YES. [2023-11-29 05:37:50,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81121 conditions, 16605 events. 8716/16605 cut-off events. For 104988/105864 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 132137 event pairs, 5162 based on Foata normal form. 320/16594 useless extension candidates. Maximal degree in co-relation 72691. Up to 10539 conditions per place. [2023-11-29 05:37:50,191 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 211 selfloop transitions, 27 changer transitions 65/336 dead transitions. [2023-11-29 05:37:50,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 336 transitions, 3691 flow [2023-11-29 05:37:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:37:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 05:37:50,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 317 transitions. [2023-11-29 05:37:50,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35941043083900226 [2023-11-29 05:37:50,192 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 317 transitions. [2023-11-29 05:37:50,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 317 transitions. [2023-11-29 05:37:50,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:37:50,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 317 transitions. [2023-11-29 05:37:50,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 17.61111111111111) internal successors, (317), 18 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:50,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 49.0) internal successors, (931), 19 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:50,195 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 49.0) internal successors, (931), 19 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:50,195 INFO L175 Difference]: Start difference. First operand has 178 places, 171 transitions, 1638 flow. Second operand 18 states and 317 transitions. [2023-11-29 05:37:50,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 336 transitions, 3691 flow [2023-11-29 05:37:50,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 336 transitions, 3613 flow, removed 2 selfloop flow, removed 19 redundant places. [2023-11-29 05:37:50,408 INFO L231 Difference]: Finished difference. Result has 176 places, 158 transitions, 1470 flow [2023-11-29 05:37:50,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1470, PETRI_PLACES=176, PETRI_TRANSITIONS=158} [2023-11-29 05:37:50,409 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 127 predicate places. [2023-11-29 05:37:50,409 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 158 transitions, 1470 flow [2023-11-29 05:37:50,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 12.475) internal successors, (499), 40 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:50,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:37:50,409 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:37:50,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 05:37:50,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:50,610 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:37:50,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:37:50,610 INFO L85 PathProgramCache]: Analyzing trace with hash 144000331, now seen corresponding path program 5 times [2023-11-29 05:37:50,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:37:50,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108379517] [2023-11-29 05:37:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:50,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:37:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:50,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:37:50,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108379517] [2023-11-29 05:37:50,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108379517] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:37:50,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316697782] [2023-11-29 05:37:50,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:37:50,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:50,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:37:50,859 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:37:50,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 05:37:51,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 05:37:51,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:37:51,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:37:51,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:37:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:51,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:37:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:51,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316697782] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:37:51,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:37:51,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 39 [2023-11-29 05:37:51,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811855376] [2023-11-29 05:37:51,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:37:51,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 05:37:51,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:37:51,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 05:37:51,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 05:37:51,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:37:51,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 158 transitions, 1470 flow. Second operand has 40 states, 40 states have (on average 12.525) internal successors, (501), 40 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:51,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:37:51,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:37:51,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:37:54,604 INFO L124 PetriNetUnfolderBase]: 8206/15315 cut-off events. [2023-11-29 05:37:54,604 INFO L125 PetriNetUnfolderBase]: For 92515/93554 co-relation queries the response was YES. [2023-11-29 05:37:54,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74849 conditions, 15315 events. 8206/15315 cut-off events. For 92515/93554 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 118180 event pairs, 5310 based on Foata normal form. 48/15162 useless extension candidates. Maximal degree in co-relation 72194. Up to 11099 conditions per place. [2023-11-29 05:37:54,736 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 86 selfloop transitions, 12 changer transitions 159/277 dead transitions. [2023-11-29 05:37:54,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 277 transitions, 3240 flow [2023-11-29 05:37:54,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 05:37:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-29 05:37:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 308 transitions. [2023-11-29 05:37:54,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2023-11-29 05:37:54,738 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 308 transitions. [2023-11-29 05:37:54,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 308 transitions. [2023-11-29 05:37:54,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:37:54,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 308 transitions. [2023-11-29 05:37:54,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 17.11111111111111) internal successors, (308), 18 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:54,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 49.0) internal successors, (931), 19 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:54,741 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 49.0) internal successors, (931), 19 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:54,741 INFO L175 Difference]: Start difference. First operand has 176 places, 158 transitions, 1470 flow. Second operand 18 states and 308 transitions. [2023-11-29 05:37:54,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 277 transitions, 3240 flow [2023-11-29 05:37:54,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 277 transitions, 3064 flow, removed 1 selfloop flow, removed 18 redundant places. [2023-11-29 05:37:54,908 INFO L231 Difference]: Finished difference. Result has 175 places, 118 transitions, 1022 flow [2023-11-29 05:37:54,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1022, PETRI_PLACES=175, PETRI_TRANSITIONS=118} [2023-11-29 05:37:54,909 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 126 predicate places. [2023-11-29 05:37:54,909 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 118 transitions, 1022 flow [2023-11-29 05:37:54,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 12.525) internal successors, (501), 40 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:54,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:37:54,909 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-11-29 05:37:54,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 05:37:55,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 05:37:55,110 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:37:55,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:37:55,110 INFO L85 PathProgramCache]: Analyzing trace with hash 558761735, now seen corresponding path program 5 times [2023-11-29 05:37:55,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:37:55,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367323040] [2023-11-29 05:37:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:37:55,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:37:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:37:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:55,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:37:55,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367323040] [2023-11-29 05:37:55,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367323040] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:37:55,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879870109] [2023-11-29 05:37:55,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:37:55,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:37:55,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:37:55,567 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:37:55,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 05:37:55,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 05:37:55,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:37:55,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 05:37:55,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:37:55,818 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 19 treesize of output 1 [2023-11-29 05:37:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:56,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:37:56,317 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 16 treesize of output 14 [2023-11-29 05:37:56,319 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 20 treesize of output 16 [2023-11-29 05:37:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:37:56,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879870109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:37:56,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:37:56,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2023-11-29 05:37:56,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753705163] [2023-11-29 05:37:56,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:37:56,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 05:37:56,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:37:56,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 05:37:56,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1674, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 05:37:56,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:37:56,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 118 transitions, 1022 flow. Second operand has 43 states, 43 states have (on average 13.372093023255815) internal successors, (575), 43 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:56,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:37:56,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:37:56,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:00,284 INFO L124 PetriNetUnfolderBase]: 5813/11737 cut-off events. [2023-11-29 05:38:00,284 INFO L125 PetriNetUnfolderBase]: For 65864/66402 co-relation queries the response was YES. [2023-11-29 05:38:00,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54454 conditions, 11737 events. 5813/11737 cut-off events. For 65864/66402 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 90949 event pairs, 879 based on Foata normal form. 240/11865 useless extension candidates. Maximal degree in co-relation 54423. Up to 2627 conditions per place. [2023-11-29 05:38:00,390 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 570 selfloop transitions, 33 changer transitions 0/630 dead transitions. [2023-11-29 05:38:00,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 630 transitions, 7089 flow [2023-11-29 05:38:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 05:38:00,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 05:38:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 446 transitions. [2023-11-29 05:38:00,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3792517006802721 [2023-11-29 05:38:00,392 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 446 transitions. [2023-11-29 05:38:00,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 446 transitions. [2023-11-29 05:38:00,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:00,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 446 transitions. [2023-11-29 05:38:00,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 18.583333333333332) internal successors, (446), 24 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:00,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 49.0) internal successors, (1225), 25 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:00,395 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 49.0) internal successors, (1225), 25 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:00,395 INFO L175 Difference]: Start difference. First operand has 175 places, 118 transitions, 1022 flow. Second operand 24 states and 446 transitions. [2023-11-29 05:38:00,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 630 transitions, 7089 flow [2023-11-29 05:38:00,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 630 transitions, 7028 flow, removed 4 selfloop flow, removed 15 redundant places. [2023-11-29 05:38:00,477 INFO L231 Difference]: Finished difference. Result has 155 places, 120 transitions, 1070 flow [2023-11-29 05:38:00,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1070, PETRI_PLACES=155, PETRI_TRANSITIONS=120} [2023-11-29 05:38:00,478 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 106 predicate places. [2023-11-29 05:38:00,478 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 120 transitions, 1070 flow [2023-11-29 05:38:00,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 13.372093023255815) internal successors, (575), 43 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:00,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:00,478 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-11-29 05:38:00,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 05:38:00,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 05:38:00,679 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:38:00,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:00,679 INFO L85 PathProgramCache]: Analyzing trace with hash 558761734, now seen corresponding path program 4 times [2023-11-29 05:38:00,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:00,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100937730] [2023-11-29 05:38:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:00,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:01,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:01,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100937730] [2023-11-29 05:38:01,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100937730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:01,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547897671] [2023-11-29 05:38:01,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:38:01,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:01,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:01,198 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:01,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 05:38:01,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:38:01,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:01,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 05:38:01,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:01,446 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 19 treesize of output 1 [2023-11-29 05:38:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:01,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:01,974 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 05:38:01,977 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 24 treesize of output 20 [2023-11-29 05:38:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:01,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547897671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:01,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:01,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2023-11-29 05:38:01,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437748640] [2023-11-29 05:38:01,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:01,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 05:38:01,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:01,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 05:38:01,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1673, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 05:38:02,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:38:02,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 120 transitions, 1070 flow. Second operand has 43 states, 43 states have (on average 13.372093023255815) internal successors, (575), 43 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:02,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:02,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:38:02,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:05,658 INFO L124 PetriNetUnfolderBase]: 5604/11394 cut-off events. [2023-11-29 05:38:05,658 INFO L125 PetriNetUnfolderBase]: For 68870/69380 co-relation queries the response was YES. [2023-11-29 05:38:05,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53327 conditions, 11394 events. 5604/11394 cut-off events. For 68870/69380 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 87991 event pairs, 879 based on Foata normal form. 232/11514 useless extension candidates. Maximal degree in co-relation 53298. Up to 2627 conditions per place. [2023-11-29 05:38:05,758 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 569 selfloop transitions, 33 changer transitions 0/629 dead transitions. [2023-11-29 05:38:05,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 629 transitions, 7106 flow [2023-11-29 05:38:05,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 05:38:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 05:38:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 445 transitions. [2023-11-29 05:38:05,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784013605442177 [2023-11-29 05:38:05,760 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 445 transitions. [2023-11-29 05:38:05,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 445 transitions. [2023-11-29 05:38:05,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:05,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 445 transitions. [2023-11-29 05:38:05,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 18.541666666666668) internal successors, (445), 24 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:05,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 49.0) internal successors, (1225), 25 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:05,762 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 49.0) internal successors, (1225), 25 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:05,762 INFO L175 Difference]: Start difference. First operand has 155 places, 120 transitions, 1070 flow. Second operand 24 states and 445 transitions. [2023-11-29 05:38:05,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 629 transitions, 7106 flow [2023-11-29 05:38:05,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 629 transitions, 7015 flow, removed 6 selfloop flow, removed 22 redundant places. [2023-11-29 05:38:05,861 INFO L231 Difference]: Finished difference. Result has 156 places, 119 transitions, 1035 flow [2023-11-29 05:38:05,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1035, PETRI_PLACES=156, PETRI_TRANSITIONS=119} [2023-11-29 05:38:05,862 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 107 predicate places. [2023-11-29 05:38:05,862 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 119 transitions, 1035 flow [2023-11-29 05:38:05,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 13.372093023255815) internal successors, (575), 43 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:05,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:05,863 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:05,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 05:38:06,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 05:38:06,063 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:38:06,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:06,064 INFO L85 PathProgramCache]: Analyzing trace with hash -722392818, now seen corresponding path program 6 times [2023-11-29 05:38:06,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:06,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500757610] [2023-11-29 05:38:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:06,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:06,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:06,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500757610] [2023-11-29 05:38:06,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500757610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:06,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596569120] [2023-11-29 05:38:06,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:38:06,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:06,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:06,540 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:06,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 05:38:06,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 05:38:06,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:06,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 05:38:06,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:06,822 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 19 treesize of output 1 [2023-11-29 05:38:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:07,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:07,369 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 05:38:07,372 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 24 treesize of output 20 [2023-11-29 05:38:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:07,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596569120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:07,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:07,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2023-11-29 05:38:07,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401629934] [2023-11-29 05:38:07,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:07,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 05:38:07,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:07,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 05:38:07,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1673, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 05:38:07,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:38:07,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 119 transitions, 1035 flow. Second operand has 43 states, 43 states have (on average 13.511627906976743) internal successors, (581), 43 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:07,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:07,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:38:07,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:10,841 INFO L124 PetriNetUnfolderBase]: 5407/10877 cut-off events. [2023-11-29 05:38:10,841 INFO L125 PetriNetUnfolderBase]: For 63216/63774 co-relation queries the response was YES. [2023-11-29 05:38:10,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51530 conditions, 10877 events. 5407/10877 cut-off events. For 63216/63774 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 83059 event pairs, 730 based on Foata normal form. 193/10959 useless extension candidates. Maximal degree in co-relation 51502. Up to 2126 conditions per place. [2023-11-29 05:38:10,933 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 344 selfloop transitions, 53 changer transitions 0/419 dead transitions. [2023-11-29 05:38:10,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 419 transitions, 5075 flow [2023-11-29 05:38:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 05:38:10,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 05:38:10,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 446 transitions. [2023-11-29 05:38:10,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3792517006802721 [2023-11-29 05:38:10,934 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 446 transitions. [2023-11-29 05:38:10,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 446 transitions. [2023-11-29 05:38:10,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:10,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 446 transitions. [2023-11-29 05:38:10,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 18.583333333333332) internal successors, (446), 24 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:10,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 49.0) internal successors, (1225), 25 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:10,936 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 49.0) internal successors, (1225), 25 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:10,936 INFO L175 Difference]: Start difference. First operand has 156 places, 119 transitions, 1035 flow. Second operand 24 states and 446 transitions. [2023-11-29 05:38:10,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 419 transitions, 5075 flow [2023-11-29 05:38:11,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 419 transitions, 4672 flow, removed 13 selfloop flow, removed 22 redundant places. [2023-11-29 05:38:11,017 INFO L231 Difference]: Finished difference. Result has 159 places, 122 transitions, 1154 flow [2023-11-29 05:38:11,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1154, PETRI_PLACES=159, PETRI_TRANSITIONS=122} [2023-11-29 05:38:11,017 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 110 predicate places. [2023-11-29 05:38:11,017 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 122 transitions, 1154 flow [2023-11-29 05:38:11,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 13.511627906976743) internal successors, (581), 43 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:11,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:11,018 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:11,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 05:38:11,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 05:38:11,218 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:38:11,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:11,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1312754282, now seen corresponding path program 3 times [2023-11-29 05:38:11,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:11,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420254574] [2023-11-29 05:38:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:11,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:11,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:11,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420254574] [2023-11-29 05:38:11,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420254574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:11,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035291419] [2023-11-29 05:38:11,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:38:11,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:11,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:11,755 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:11,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 05:38:11,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 05:38:11,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:11,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 05:38:11,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:12,107 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 19 treesize of output 1 [2023-11-29 05:38:12,168 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-29 05:38:12,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 13 [2023-11-29 05:38:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:12,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:14,003 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 23 treesize of output 21 [2023-11-29 05:38:14,006 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 46 treesize of output 42 [2023-11-29 05:38:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:14,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035291419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:14,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:14,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2023-11-29 05:38:14,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186646661] [2023-11-29 05:38:14,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:14,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-29 05:38:14,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:14,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-29 05:38:14,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2191, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 05:38:14,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:38:14,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 122 transitions, 1154 flow. Second operand has 49 states, 49 states have (on average 13.448979591836734) internal successors, (659), 49 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:14,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:14,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:38:14,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:17,979 INFO L124 PetriNetUnfolderBase]: 5290/10637 cut-off events. [2023-11-29 05:38:17,980 INFO L125 PetriNetUnfolderBase]: For 66763/67310 co-relation queries the response was YES. [2023-11-29 05:38:18,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51819 conditions, 10637 events. 5290/10637 cut-off events. For 66763/67310 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 80956 event pairs, 640 based on Foata normal form. 122/10628 useless extension candidates. Maximal degree in co-relation 51790. Up to 1946 conditions per place. [2023-11-29 05:38:18,067 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 338 selfloop transitions, 58 changer transitions 0/418 dead transitions. [2023-11-29 05:38:18,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 418 transitions, 4807 flow [2023-11-29 05:38:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 05:38:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-29 05:38:18,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 457 transitions. [2023-11-29 05:38:18,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3730612244897959 [2023-11-29 05:38:18,068 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 457 transitions. [2023-11-29 05:38:18,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 457 transitions. [2023-11-29 05:38:18,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:18,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 457 transitions. [2023-11-29 05:38:18,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 18.28) internal successors, (457), 25 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:18,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 49.0) internal successors, (1274), 26 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:18,070 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 49.0) internal successors, (1274), 26 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:18,070 INFO L175 Difference]: Start difference. First operand has 159 places, 122 transitions, 1154 flow. Second operand 25 states and 457 transitions. [2023-11-29 05:38:18,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 418 transitions, 4807 flow [2023-11-29 05:38:18,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 418 transitions, 4678 flow, removed 3 selfloop flow, removed 21 redundant places. [2023-11-29 05:38:18,162 INFO L231 Difference]: Finished difference. Result has 162 places, 121 transitions, 1129 flow [2023-11-29 05:38:18,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1129, PETRI_PLACES=162, PETRI_TRANSITIONS=121} [2023-11-29 05:38:18,162 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 113 predicate places. [2023-11-29 05:38:18,162 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 121 transitions, 1129 flow [2023-11-29 05:38:18,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 13.448979591836734) internal successors, (659), 49 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:18,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:18,163 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-29 05:38:18,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 05:38:18,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 05:38:18,363 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:38:18,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:18,363 INFO L85 PathProgramCache]: Analyzing trace with hash 724468722, now seen corresponding path program 6 times [2023-11-29 05:38:18,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:18,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897002708] [2023-11-29 05:38:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:18,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:18,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:18,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897002708] [2023-11-29 05:38:18,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897002708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:18,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535393882] [2023-11-29 05:38:18,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:38:18,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:18,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:18,677 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:18,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 05:38:18,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 05:38:18,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:18,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 05:38:18,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:19,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:19,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535393882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:19,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:19,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 49 [2023-11-29 05:38:19,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905800874] [2023-11-29 05:38:19,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:19,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 05:38:19,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:19,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 05:38:19,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2043, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 05:38:19,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:38:19,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 121 transitions, 1129 flow. Second operand has 50 states, 50 states have (on average 12.46) internal successors, (623), 50 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:19,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:19,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:38:19,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:22,041 INFO L124 PetriNetUnfolderBase]: 5317/10265 cut-off events. [2023-11-29 05:38:22,041 INFO L125 PetriNetUnfolderBase]: For 61808/62325 co-relation queries the response was YES. [2023-11-29 05:38:22,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49966 conditions, 10265 events. 5317/10265 cut-off events. For 61808/62325 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 75521 event pairs, 2395 based on Foata normal form. 111/10201 useless extension candidates. Maximal degree in co-relation 49938. Up to 4706 conditions per place. [2023-11-29 05:38:22,129 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 234 selfloop transitions, 31 changer transitions 81/372 dead transitions. [2023-11-29 05:38:22,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 372 transitions, 4395 flow [2023-11-29 05:38:22,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:38:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 05:38:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 384 transitions. [2023-11-29 05:38:22,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3562152133580705 [2023-11-29 05:38:22,130 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 384 transitions. [2023-11-29 05:38:22,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 384 transitions. [2023-11-29 05:38:22,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:22,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 384 transitions. [2023-11-29 05:38:22,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 17.454545454545453) internal successors, (384), 22 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:22,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 49.0) internal successors, (1127), 23 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:22,132 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 49.0) internal successors, (1127), 23 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:22,132 INFO L175 Difference]: Start difference. First operand has 162 places, 121 transitions, 1129 flow. Second operand 22 states and 384 transitions. [2023-11-29 05:38:22,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 372 transitions, 4395 flow [2023-11-29 05:38:22,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 372 transitions, 4030 flow, removed 11 selfloop flow, removed 23 redundant places. [2023-11-29 05:38:22,238 INFO L231 Difference]: Finished difference. Result has 170 places, 134 transitions, 1304 flow [2023-11-29 05:38:22,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1304, PETRI_PLACES=170, PETRI_TRANSITIONS=134} [2023-11-29 05:38:22,238 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 121 predicate places. [2023-11-29 05:38:22,238 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 134 transitions, 1304 flow [2023-11-29 05:38:22,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 12.46) internal successors, (623), 50 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:22,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:22,239 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:22,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 05:38:22,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 05:38:22,439 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:38:22,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:22,440 INFO L85 PathProgramCache]: Analyzing trace with hash 2062699193, now seen corresponding path program 7 times [2023-11-29 05:38:22,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:22,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777441036] [2023-11-29 05:38:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:22,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:22,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:22,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777441036] [2023-11-29 05:38:22,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777441036] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:22,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306922350] [2023-11-29 05:38:22,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:38:22,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:22,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:22,724 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:22,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 05:38:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:22,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 05:38:22,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:23,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 44 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:23,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306922350] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:23,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:23,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 49 [2023-11-29 05:38:23,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725309302] [2023-11-29 05:38:23,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:23,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-29 05:38:23,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:23,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-29 05:38:23,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2043, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 05:38:23,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:38:23,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 134 transitions, 1304 flow. Second operand has 50 states, 50 states have (on average 12.5) internal successors, (625), 50 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:23,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:23,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:38:23,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:26,130 INFO L124 PetriNetUnfolderBase]: 4833/9175 cut-off events. [2023-11-29 05:38:26,131 INFO L125 PetriNetUnfolderBase]: For 56691/57495 co-relation queries the response was YES. [2023-11-29 05:38:26,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45479 conditions, 9175 events. 4833/9175 cut-off events. For 56691/57495 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 65830 event pairs, 2318 based on Foata normal form. 266/9320 useless extension candidates. Maximal degree in co-relation 45442. Up to 4849 conditions per place. [2023-11-29 05:38:26,215 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 61 selfloop transitions, 12 changer transitions 237/330 dead transitions. [2023-11-29 05:38:26,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 330 transitions, 4195 flow [2023-11-29 05:38:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:38:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 05:38:26,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 373 transitions. [2023-11-29 05:38:26,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460111317254174 [2023-11-29 05:38:26,217 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 373 transitions. [2023-11-29 05:38:26,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 373 transitions. [2023-11-29 05:38:26,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:26,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 373 transitions. [2023-11-29 05:38:26,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 16.954545454545453) internal successors, (373), 22 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:26,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 49.0) internal successors, (1127), 23 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:26,219 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 49.0) internal successors, (1127), 23 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:26,219 INFO L175 Difference]: Start difference. First operand has 170 places, 134 transitions, 1304 flow. Second operand 22 states and 373 transitions. [2023-11-29 05:38:26,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 330 transitions, 4195 flow [2023-11-29 05:38:26,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 330 transitions, 4052 flow, removed 58 selfloop flow, removed 12 redundant places. [2023-11-29 05:38:26,329 INFO L231 Difference]: Finished difference. Result has 179 places, 93 transitions, 809 flow [2023-11-29 05:38:26,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=809, PETRI_PLACES=179, PETRI_TRANSITIONS=93} [2023-11-29 05:38:26,330 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 130 predicate places. [2023-11-29 05:38:26,330 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 93 transitions, 809 flow [2023-11-29 05:38:26,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 12.5) internal successors, (625), 50 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:26,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:26,330 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-29 05:38:26,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 05:38:26,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:26,531 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:38:26,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:26,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1648202033, now seen corresponding path program 7 times [2023-11-29 05:38:26,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:26,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360423461] [2023-11-29 05:38:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:26,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:27,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:27,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360423461] [2023-11-29 05:38:27,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360423461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:27,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067151695] [2023-11-29 05:38:27,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:38:27,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:27,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:27,199 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:27,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 05:38:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:27,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 05:38:27,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:27,562 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 19 treesize of output 1 [2023-11-29 05:38:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:27,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:28,329 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 16 treesize of output 14 [2023-11-29 05:38:28,331 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 20 treesize of output 16 [2023-11-29 05:38:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:28,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067151695] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:28,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:28,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 51 [2023-11-29 05:38:28,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513710359] [2023-11-29 05:38:28,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:28,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 05:38:28,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:28,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 05:38:28,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2594, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 05:38:29,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:38:29,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 93 transitions, 809 flow. Second operand has 53 states, 53 states have (on average 13.358490566037736) internal successors, (708), 53 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:29,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:29,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:38:29,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:32,536 INFO L124 PetriNetUnfolderBase]: 3286/6611 cut-off events. [2023-11-29 05:38:32,536 INFO L125 PetriNetUnfolderBase]: For 39340/39746 co-relation queries the response was YES. [2023-11-29 05:38:32,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32014 conditions, 6611 events. 3286/6611 cut-off events. For 39340/39746 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 45062 event pairs, 449 based on Foata normal form. 64/6575 useless extension candidates. Maximal degree in co-relation 31978. Up to 1333 conditions per place. [2023-11-29 05:38:32,596 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 412 selfloop transitions, 39 changer transitions 0/472 dead transitions. [2023-11-29 05:38:32,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 472 transitions, 5391 flow [2023-11-29 05:38:32,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 05:38:32,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 05:38:32,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 540 transitions. [2023-11-29 05:38:32,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3800140745953554 [2023-11-29 05:38:32,598 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 540 transitions. [2023-11-29 05:38:32,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 540 transitions. [2023-11-29 05:38:32,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:32,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 540 transitions. [2023-11-29 05:38:32,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 18.620689655172413) internal successors, (540), 29 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:32,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 49.0) internal successors, (1470), 30 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:32,601 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 49.0) internal successors, (1470), 30 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:32,602 INFO L175 Difference]: Start difference. First operand has 179 places, 93 transitions, 809 flow. Second operand 29 states and 540 transitions. [2023-11-29 05:38:32,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 472 transitions, 5391 flow [2023-11-29 05:38:32,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 472 transitions, 4875 flow, removed 23 selfloop flow, removed 25 redundant places. [2023-11-29 05:38:32,696 INFO L231 Difference]: Finished difference. Result has 152 places, 98 transitions, 878 flow [2023-11-29 05:38:32,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=878, PETRI_PLACES=152, PETRI_TRANSITIONS=98} [2023-11-29 05:38:32,696 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 103 predicate places. [2023-11-29 05:38:32,696 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 98 transitions, 878 flow [2023-11-29 05:38:32,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 13.358490566037736) internal successors, (708), 53 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:32,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:32,697 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-29 05:38:32,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 05:38:32,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:32,897 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:38:32,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:32,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1648202034, now seen corresponding path program 5 times [2023-11-29 05:38:32,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:32,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332595919] [2023-11-29 05:38:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:32,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:33,408 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:33,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:33,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332595919] [2023-11-29 05:38:33,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332595919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:33,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857873] [2023-11-29 05:38:33,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:38:33,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:33,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:33,410 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:33,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 05:38:33,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-29 05:38:33,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:33,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 05:38:33,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:33,753 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 19 treesize of output 1 [2023-11-29 05:38:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:34,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:34,522 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 05:38:34,525 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 24 treesize of output 20 [2023-11-29 05:38:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:34,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857873] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:34,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:34,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 51 [2023-11-29 05:38:34,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028461433] [2023-11-29 05:38:34,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:34,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 05:38:34,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:34,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 05:38:34,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2593, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 05:38:35,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:38:35,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 98 transitions, 878 flow. Second operand has 53 states, 53 states have (on average 13.358490566037736) internal successors, (708), 53 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:35,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:35,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:38:35,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:38,657 INFO L124 PetriNetUnfolderBase]: 3198/6473 cut-off events. [2023-11-29 05:38:38,658 INFO L125 PetriNetUnfolderBase]: For 36889/37168 co-relation queries the response was YES. [2023-11-29 05:38:38,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30467 conditions, 6473 events. 3198/6473 cut-off events. For 36889/37168 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 43926 event pairs, 423 based on Foata normal form. 65/6441 useless extension candidates. Maximal degree in co-relation 30441. Up to 1337 conditions per place. [2023-11-29 05:38:38,707 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 411 selfloop transitions, 39 changer transitions 0/471 dead transitions. [2023-11-29 05:38:38,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 471 transitions, 4969 flow [2023-11-29 05:38:38,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 05:38:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 05:38:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 539 transitions. [2023-11-29 05:38:38,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2023-11-29 05:38:38,709 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 539 transitions. [2023-11-29 05:38:38,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 539 transitions. [2023-11-29 05:38:38,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:38,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 539 transitions. [2023-11-29 05:38:38,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 18.586206896551722) internal successors, (539), 29 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:38,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 49.0) internal successors, (1470), 30 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:38,712 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 49.0) internal successors, (1470), 30 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:38,712 INFO L175 Difference]: Start difference. First operand has 152 places, 98 transitions, 878 flow. Second operand 29 states and 539 transitions. [2023-11-29 05:38:38,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 471 transitions, 4969 flow [2023-11-29 05:38:38,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 471 transitions, 4858 flow, removed 6 selfloop flow, removed 26 redundant places. [2023-11-29 05:38:38,782 INFO L231 Difference]: Finished difference. Result has 154 places, 97 transitions, 834 flow [2023-11-29 05:38:38,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=834, PETRI_PLACES=154, PETRI_TRANSITIONS=97} [2023-11-29 05:38:38,783 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 105 predicate places. [2023-11-29 05:38:38,783 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 97 transitions, 834 flow [2023-11-29 05:38:38,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 13.358490566037736) internal successors, (708), 53 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:38,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:38,783 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:38,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 05:38:38,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:38,984 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:38:38,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:38,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1741229483, now seen corresponding path program 4 times [2023-11-29 05:38:38,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:38,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934832707] [2023-11-29 05:38:38,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:38,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:39,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:39,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934832707] [2023-11-29 05:38:39,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934832707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:39,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084487667] [2023-11-29 05:38:39,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:38:39,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:39,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:39,496 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:39,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 05:38:39,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:38:39,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:39,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 05:38:39,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:39,904 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 05:38:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:40,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:41,878 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 05:38:41,882 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 05:38:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 36 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:42,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084487667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:42,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:42,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 64 [2023-11-29 05:38:42,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799434095] [2023-11-29 05:38:42,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:42,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-29 05:38:42,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:42,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-29 05:38:42,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=4005, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 05:38:44,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:38:44,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 97 transitions, 834 flow. Second operand has 66 states, 66 states have (on average 12.545454545454545) internal successors, (828), 66 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:44,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:44,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:38:44,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:38:55,400 INFO L124 PetriNetUnfolderBase]: 12712/23257 cut-off events. [2023-11-29 05:38:55,400 INFO L125 PetriNetUnfolderBase]: For 137787/139195 co-relation queries the response was YES. [2023-11-29 05:38:55,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111564 conditions, 23257 events. 12712/23257 cut-off events. For 137787/139195 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 183738 event pairs, 815 based on Foata normal form. 328/23443 useless extension candidates. Maximal degree in co-relation 111539. Up to 3203 conditions per place. [2023-11-29 05:38:55,621 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 1489 selfloop transitions, 105 changer transitions 18/1632 dead transitions. [2023-11-29 05:38:55,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 1632 transitions, 21215 flow [2023-11-29 05:38:55,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 05:38:55,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-29 05:38:55,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 1329 transitions. [2023-11-29 05:38:55,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048126713371916 [2023-11-29 05:38:55,624 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 1329 transitions. [2023-11-29 05:38:55,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 1329 transitions. [2023-11-29 05:38:55,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:38:55,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 1329 transitions. [2023-11-29 05:38:55,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 19.83582089552239) internal successors, (1329), 67 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:55,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 49.0) internal successors, (3332), 68 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:55,628 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 49.0) internal successors, (3332), 68 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:55,628 INFO L175 Difference]: Start difference. First operand has 154 places, 97 transitions, 834 flow. Second operand 67 states and 1329 transitions. [2023-11-29 05:38:55,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 1632 transitions, 21215 flow [2023-11-29 05:38:55,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 1632 transitions, 19707 flow, removed 0 selfloop flow, removed 26 redundant places. [2023-11-29 05:38:55,848 INFO L231 Difference]: Finished difference. Result has 202 places, 168 transitions, 1675 flow [2023-11-29 05:38:55,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=1675, PETRI_PLACES=202, PETRI_TRANSITIONS=168} [2023-11-29 05:38:55,849 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 153 predicate places. [2023-11-29 05:38:55,849 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 168 transitions, 1675 flow [2023-11-29 05:38:55,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 12.545454545454545) internal successors, (828), 66 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:55,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:55,849 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:55,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 05:38:56,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:56,050 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:38:56,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:56,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1741229482, now seen corresponding path program 8 times [2023-11-29 05:38:56,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:56,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684231531] [2023-11-29 05:38:56,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:56,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:56,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:56,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684231531] [2023-11-29 05:38:56,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684231531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:56,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857452832] [2023-11-29 05:38:56,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:38:56,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:56,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:56,601 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:56,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 05:38:56,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:38:56,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:56,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 05:38:56,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:56,953 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 19 treesize of output 1 [2023-11-29 05:38:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:57,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:57,754 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 05:38:57,756 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 24 treesize of output 20 [2023-11-29 05:38:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:57,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857452832] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:57,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:57,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 51 [2023-11-29 05:38:57,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345867844] [2023-11-29 05:38:57,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:57,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 05:38:57,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:57,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 05:38:57,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2594, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 05:38:58,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:38:58,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 168 transitions, 1675 flow. Second operand has 53 states, 53 states have (on average 13.471698113207546) internal successors, (714), 53 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:58,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:58,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:38:58,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:39:04,388 INFO L124 PetriNetUnfolderBase]: 11154/22289 cut-off events. [2023-11-29 05:39:04,389 INFO L125 PetriNetUnfolderBase]: For 148840/150200 co-relation queries the response was YES. [2023-11-29 05:39:04,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113352 conditions, 22289 events. 11154/22289 cut-off events. For 148840/150200 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 187344 event pairs, 1330 based on Foata normal form. 418/22489 useless extension candidates. Maximal degree in co-relation 113319. Up to 3903 conditions per place. [2023-11-29 05:39:04,630 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 487 selfloop transitions, 92 changer transitions 0/603 dead transitions. [2023-11-29 05:39:04,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 603 transitions, 7381 flow [2023-11-29 05:39:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 05:39:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-29 05:39:04,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 539 transitions. [2023-11-29 05:39:04,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2023-11-29 05:39:04,632 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 539 transitions. [2023-11-29 05:39:04,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 539 transitions. [2023-11-29 05:39:04,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:39:04,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 539 transitions. [2023-11-29 05:39:04,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 18.586206896551722) internal successors, (539), 29 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:04,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 49.0) internal successors, (1470), 30 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:04,634 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 49.0) internal successors, (1470), 30 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:04,634 INFO L175 Difference]: Start difference. First operand has 202 places, 168 transitions, 1675 flow. Second operand 29 states and 539 transitions. [2023-11-29 05:39:04,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 603 transitions, 7381 flow [2023-11-29 05:39:04,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 603 transitions, 7050 flow, removed 55 selfloop flow, removed 25 redundant places. [2023-11-29 05:39:04,956 INFO L231 Difference]: Finished difference. Result has 207 places, 170 transitions, 1615 flow [2023-11-29 05:39:04,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1615, PETRI_PLACES=207, PETRI_TRANSITIONS=170} [2023-11-29 05:39:04,956 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 158 predicate places. [2023-11-29 05:39:04,957 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 170 transitions, 1615 flow [2023-11-29 05:39:04,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 13.471698113207546) internal successors, (714), 53 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:04,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:39:04,957 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2023-11-29 05:39:04,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 05:39:05,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 05:39:05,157 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:39:05,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:05,158 INFO L85 PathProgramCache]: Analyzing trace with hash 127205557, now seen corresponding path program 2 times [2023-11-29 05:39:05,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:05,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945400866] [2023-11-29 05:39:05,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:05,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 05:39:05,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:05,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945400866] [2023-11-29 05:39:05,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945400866] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:05,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768754785] [2023-11-29 05:39:05,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:39:05,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:05,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:05,278 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:05,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 05:39:05,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:39:05,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:05,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:39:05,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-29 05:39:05,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-29 05:39:05,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768754785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:05,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:05,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 14 [2023-11-29 05:39:05,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461271660] [2023-11-29 05:39:05,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:05,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:39:05,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:05,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:39:05,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:39:05,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 05:39:05,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 170 transitions, 1615 flow. Second operand has 15 states, 15 states have (on average 15.666666666666666) internal successors, (235), 15 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:05,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:39:05,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 05:39:05,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:39:10,028 INFO L124 PetriNetUnfolderBase]: 12532/23369 cut-off events. [2023-11-29 05:39:10,028 INFO L125 PetriNetUnfolderBase]: For 150197/151492 co-relation queries the response was YES. [2023-11-29 05:39:10,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113475 conditions, 23369 events. 12532/23369 cut-off events. For 150197/151492 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 186199 event pairs, 887 based on Foata normal form. 671/23945 useless extension candidates. Maximal degree in co-relation 113442. Up to 3914 conditions per place. [2023-11-29 05:39:10,261 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 1032 selfloop transitions, 26 changer transitions 0/1093 dead transitions. [2023-11-29 05:39:10,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 1093 transitions, 13766 flow [2023-11-29 05:39:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:39:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:39:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 356 transitions. [2023-11-29 05:39:10,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48435374149659866 [2023-11-29 05:39:10,262 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 356 transitions. [2023-11-29 05:39:10,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 356 transitions. [2023-11-29 05:39:10,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:39:10,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 356 transitions. [2023-11-29 05:39:10,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 23.733333333333334) internal successors, (356), 15 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:10,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 49.0) internal successors, (784), 16 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:10,263 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 49.0) internal successors, (784), 16 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:10,263 INFO L175 Difference]: Start difference. First operand has 207 places, 170 transitions, 1615 flow. Second operand 15 states and 356 transitions. [2023-11-29 05:39:10,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 1093 transitions, 13766 flow [2023-11-29 05:39:10,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1093 transitions, 12800 flow, removed 0 selfloop flow, removed 28 redundant places. [2023-11-29 05:39:10,506 INFO L231 Difference]: Finished difference. Result has 194 places, 173 transitions, 1590 flow [2023-11-29 05:39:10,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1590, PETRI_PLACES=194, PETRI_TRANSITIONS=173} [2023-11-29 05:39:10,506 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 145 predicate places. [2023-11-29 05:39:10,506 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 173 transitions, 1590 flow [2023-11-29 05:39:10,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 15.666666666666666) internal successors, (235), 15 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:10,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:39:10,506 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:10,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-29 05:39:10,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 05:39:10,707 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:39:10,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:10,707 INFO L85 PathProgramCache]: Analyzing trace with hash -444207940, now seen corresponding path program 2 times [2023-11-29 05:39:10,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:10,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970035700] [2023-11-29 05:39:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:10,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-29 05:39:10,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:10,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970035700] [2023-11-29 05:39:10,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970035700] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:10,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081771388] [2023-11-29 05:39:10,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:39:10,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:10,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:10,885 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:10,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 05:39:11,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:39:11,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:11,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:39:11,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-29 05:39:11,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-29 05:39:11,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081771388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:11,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:11,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 14 [2023-11-29 05:39:11,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483917946] [2023-11-29 05:39:11,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:11,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:39:11,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:11,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:39:11,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:39:11,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2023-11-29 05:39:11,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 173 transitions, 1590 flow. Second operand has 15 states, 15 states have (on average 15.933333333333334) internal successors, (239), 15 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:11,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:39:11,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2023-11-29 05:39:11,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:39:15,449 INFO L124 PetriNetUnfolderBase]: 13745/25066 cut-off events. [2023-11-29 05:39:15,449 INFO L125 PetriNetUnfolderBase]: For 193439/196625 co-relation queries the response was YES. [2023-11-29 05:39:15,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127355 conditions, 25066 events. 13745/25066 cut-off events. For 193439/196625 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 198372 event pairs, 673 based on Foata normal form. 516/25450 useless extension candidates. Maximal degree in co-relation 127324. Up to 3653 conditions per place. [2023-11-29 05:39:15,692 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 463 selfloop transitions, 76 changer transitions 0/560 dead transitions. [2023-11-29 05:39:15,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 560 transitions, 7405 flow [2023-11-29 05:39:15,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:39:15,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:39:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 356 transitions. [2023-11-29 05:39:15,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48435374149659866 [2023-11-29 05:39:15,693 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 356 transitions. [2023-11-29 05:39:15,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 356 transitions. [2023-11-29 05:39:15,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:39:15,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 356 transitions. [2023-11-29 05:39:15,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 23.733333333333334) internal successors, (356), 15 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:15,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 49.0) internal successors, (784), 16 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:15,695 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 49.0) internal successors, (784), 16 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:15,695 INFO L175 Difference]: Start difference. First operand has 194 places, 173 transitions, 1590 flow. Second operand 15 states and 356 transitions. [2023-11-29 05:39:15,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 560 transitions, 7405 flow [2023-11-29 05:39:16,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 560 transitions, 6817 flow, removed 80 selfloop flow, removed 17 redundant places. [2023-11-29 05:39:16,011 INFO L231 Difference]: Finished difference. Result has 192 places, 182 transitions, 1803 flow [2023-11-29 05:39:16,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1803, PETRI_PLACES=192, PETRI_TRANSITIONS=182} [2023-11-29 05:39:16,011 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 143 predicate places. [2023-11-29 05:39:16,011 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 182 transitions, 1803 flow [2023-11-29 05:39:16,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 15.933333333333334) internal successors, (239), 15 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:16,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:39:16,012 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2023-11-29 05:39:16,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 05:39:16,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 05:39:16,212 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:39:16,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:16,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1985476025, now seen corresponding path program 6 times [2023-11-29 05:39:16,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:16,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033880953] [2023-11-29 05:39:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:16,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 45 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:16,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:16,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033880953] [2023-11-29 05:39:16,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033880953] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:16,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562298559] [2023-11-29 05:39:16,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:39:16,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:16,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:16,644 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:16,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 05:39:16,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 05:39:16,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:16,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 05:39:16,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 70 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:17,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 70 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:17,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562298559] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:17,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:17,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 59 [2023-11-29 05:39:17,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024718612] [2023-11-29 05:39:17,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:17,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 05:39:17,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:17,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 05:39:17,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=2974, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 05:39:18,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:39:18,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 182 transitions, 1803 flow. Second operand has 60 states, 60 states have (on average 12.45) internal successors, (747), 60 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:18,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:39:18,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:39:18,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:39:22,779 INFO L124 PetriNetUnfolderBase]: 12328/22835 cut-off events. [2023-11-29 05:39:22,780 INFO L125 PetriNetUnfolderBase]: For 167974/170756 co-relation queries the response was YES. [2023-11-29 05:39:22,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112882 conditions, 22835 events. 12328/22835 cut-off events. For 167974/170756 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 181393 event pairs, 6222 based on Foata normal form. 329/22688 useless extension candidates. Maximal degree in co-relation 112853. Up to 13162 conditions per place. [2023-11-29 05:39:22,991 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 340 selfloop transitions, 38 changer transitions 138/554 dead transitions. [2023-11-29 05:39:22,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 554 transitions, 6791 flow [2023-11-29 05:39:22,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 05:39:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 05:39:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 450 transitions. [2023-11-29 05:39:22,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3532182103610675 [2023-11-29 05:39:22,993 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 450 transitions. [2023-11-29 05:39:22,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 450 transitions. [2023-11-29 05:39:22,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:39:22,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 450 transitions. [2023-11-29 05:39:22,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 17.307692307692307) internal successors, (450), 26 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:22,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 49.0) internal successors, (1323), 27 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:22,996 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 49.0) internal successors, (1323), 27 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:22,996 INFO L175 Difference]: Start difference. First operand has 192 places, 182 transitions, 1803 flow. Second operand 26 states and 450 transitions. [2023-11-29 05:39:22,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 554 transitions, 6791 flow [2023-11-29 05:39:23,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 554 transitions, 6330 flow, removed 1 selfloop flow, removed 13 redundant places. [2023-11-29 05:39:23,317 INFO L231 Difference]: Finished difference. Result has 216 places, 197 transitions, 2008 flow [2023-11-29 05:39:23,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2008, PETRI_PLACES=216, PETRI_TRANSITIONS=197} [2023-11-29 05:39:23,317 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 167 predicate places. [2023-11-29 05:39:23,317 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 197 transitions, 2008 flow [2023-11-29 05:39:23,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 12.45) internal successors, (747), 60 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:23,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:39:23,317 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:23,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 05:39:23,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:23,518 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:39:23,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:23,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1682047487, now seen corresponding path program 9 times [2023-11-29 05:39:23,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:23,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927504877] [2023-11-29 05:39:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:23,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 45 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:23,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:23,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927504877] [2023-11-29 05:39:23,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927504877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:23,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000102065] [2023-11-29 05:39:23,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:39:23,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:23,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:23,938 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:23,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 05:39:24,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 05:39:24,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:24,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 05:39:24,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 70 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:24,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 70 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:24,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000102065] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:24,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:24,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 59 [2023-11-29 05:39:24,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023656300] [2023-11-29 05:39:24,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:24,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 05:39:24,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:24,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 05:39:24,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=2974, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 05:39:25,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:39:25,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 197 transitions, 2008 flow. Second operand has 60 states, 60 states have (on average 12.483333333333333) internal successors, (749), 60 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:25,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:39:25,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:39:25,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:39:29,920 INFO L124 PetriNetUnfolderBase]: 11678/21463 cut-off events. [2023-11-29 05:39:29,921 INFO L125 PetriNetUnfolderBase]: For 155192/158273 co-relation queries the response was YES. [2023-11-29 05:39:30,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111596 conditions, 21463 events. 11678/21463 cut-off events. For 155192/158273 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 168621 event pairs, 6308 based on Foata normal form. 407/21595 useless extension candidates. Maximal degree in co-relation 111555. Up to 13658 conditions per place. [2023-11-29 05:39:30,185 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 110 selfloop transitions, 15 changer transitions 332/478 dead transitions. [2023-11-29 05:39:30,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 478 transitions, 6541 flow [2023-11-29 05:39:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 05:39:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-29 05:39:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 437 transitions. [2023-11-29 05:39:30,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34301412872841447 [2023-11-29 05:39:30,187 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 437 transitions. [2023-11-29 05:39:30,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 437 transitions. [2023-11-29 05:39:30,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:39:30,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 437 transitions. [2023-11-29 05:39:30,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 16.807692307692307) internal successors, (437), 26 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:30,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 49.0) internal successors, (1323), 27 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:30,189 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 49.0) internal successors, (1323), 27 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:30,190 INFO L175 Difference]: Start difference. First operand has 216 places, 197 transitions, 2008 flow. Second operand 26 states and 437 transitions. [2023-11-29 05:39:30,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 478 transitions, 6541 flow [2023-11-29 05:39:30,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 478 transitions, 6358 flow, removed 71 selfloop flow, removed 14 redundant places. [2023-11-29 05:39:30,561 INFO L231 Difference]: Finished difference. Result has 227 places, 146 transitions, 1388 flow [2023-11-29 05:39:30,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1388, PETRI_PLACES=227, PETRI_TRANSITIONS=146} [2023-11-29 05:39:30,561 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 178 predicate places. [2023-11-29 05:39:30,561 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 146 transitions, 1388 flow [2023-11-29 05:39:30,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 12.483333333333333) internal successors, (749), 60 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:30,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:39:30,562 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2023-11-29 05:39:30,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 05:39:30,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:30,762 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:39:30,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:30,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1039266684, now seen corresponding path program 7 times [2023-11-29 05:39:30,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:30,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4067177] [2023-11-29 05:39:30,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:30,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:31,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:31,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4067177] [2023-11-29 05:39:31,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4067177] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:31,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757661849] [2023-11-29 05:39:31,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:39:31,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:31,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:31,636 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:31,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 05:39:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:31,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 05:39:31,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:32,037 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 19 treesize of output 1 [2023-11-29 05:39:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:32,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:33,097 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 05:39:33,099 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 24 treesize of output 20 [2023-11-29 05:39:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:33,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757661849] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:33,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:33,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 61 [2023-11-29 05:39:33,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076919577] [2023-11-29 05:39:33,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:33,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-29 05:39:33,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:33,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-29 05:39:33,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=3713, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 05:39:33,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:39:33,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 146 transitions, 1388 flow. Second operand has 63 states, 63 states have (on average 13.34920634920635) internal successors, (841), 63 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:33,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:39:33,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:39:33,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:39:40,787 INFO L124 PetriNetUnfolderBase]: 8552/17015 cut-off events. [2023-11-29 05:39:40,787 INFO L125 PetriNetUnfolderBase]: For 112076/113969 co-relation queries the response was YES. [2023-11-29 05:39:40,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83903 conditions, 17015 events. 8552/17015 cut-off events. For 112076/113969 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 133738 event pairs, 948 based on Foata normal form. 351/17203 useless extension candidates. Maximal degree in co-relation 83863. Up to 3314 conditions per place. [2023-11-29 05:39:40,974 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 1088 selfloop transitions, 47 changer transitions 0/1166 dead transitions. [2023-11-29 05:39:40,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 1166 transitions, 14403 flow [2023-11-29 05:39:40,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 05:39:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-29 05:39:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 631 transitions. [2023-11-29 05:39:40,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787515006002401 [2023-11-29 05:39:40,975 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 631 transitions. [2023-11-29 05:39:40,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 631 transitions. [2023-11-29 05:39:40,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:39:40,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 631 transitions. [2023-11-29 05:39:40,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 18.558823529411764) internal successors, (631), 34 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:40,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 49.0) internal successors, (1715), 35 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:40,978 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 49.0) internal successors, (1715), 35 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:40,978 INFO L175 Difference]: Start difference. First operand has 227 places, 146 transitions, 1388 flow. Second operand 34 states and 631 transitions. [2023-11-29 05:39:40,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 1166 transitions, 14403 flow [2023-11-29 05:39:41,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1166 transitions, 14323 flow, removed 25 selfloop flow, removed 27 redundant places. [2023-11-29 05:39:41,338 INFO L231 Difference]: Finished difference. Result has 194 places, 149 transitions, 1463 flow [2023-11-29 05:39:41,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1308, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1463, PETRI_PLACES=194, PETRI_TRANSITIONS=149} [2023-11-29 05:39:41,338 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 145 predicate places. [2023-11-29 05:39:41,338 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 149 transitions, 1463 flow [2023-11-29 05:39:41,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 13.34920634920635) internal successors, (841), 63 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:41,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:39:41,339 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2023-11-29 05:39:41,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 05:39:41,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-29 05:39:41,539 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:39:41,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:41,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1039266685, now seen corresponding path program 8 times [2023-11-29 05:39:41,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:41,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406962185] [2023-11-29 05:39:41,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:41,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:42,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:42,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406962185] [2023-11-29 05:39:42,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406962185] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:42,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071974517] [2023-11-29 05:39:42,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:39:42,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:42,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:42,231 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:42,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 05:39:42,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:39:42,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:42,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 05:39:42,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:42,743 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 19 treesize of output 1 [2023-11-29 05:39:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:43,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:43,778 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 16 treesize of output 14 [2023-11-29 05:39:43,780 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 20 treesize of output 16 [2023-11-29 05:39:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:43,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071974517] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:43,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:43,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 61 [2023-11-29 05:39:43,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078424514] [2023-11-29 05:39:43,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:43,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-29 05:39:43,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:43,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-29 05:39:43,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3714, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 05:39:44,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:39:44,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 149 transitions, 1463 flow. Second operand has 63 states, 63 states have (on average 13.34920634920635) internal successors, (841), 63 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:44,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:39:44,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:39:44,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:39:50,796 INFO L124 PetriNetUnfolderBase]: 8324/16671 cut-off events. [2023-11-29 05:39:50,796 INFO L125 PetriNetUnfolderBase]: For 114426/116174 co-relation queries the response was YES. [2023-11-29 05:39:50,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82557 conditions, 16671 events. 8324/16671 cut-off events. For 114426/116174 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 130803 event pairs, 886 based on Foata normal form. 221/16731 useless extension candidates. Maximal degree in co-relation 82529. Up to 3322 conditions per place. [2023-11-29 05:39:50,952 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 1087 selfloop transitions, 47 changer transitions 0/1165 dead transitions. [2023-11-29 05:39:50,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 1165 transitions, 14430 flow [2023-11-29 05:39:50,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 05:39:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-29 05:39:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 630 transitions. [2023-11-29 05:39:50,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37815126050420167 [2023-11-29 05:39:50,953 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 630 transitions. [2023-11-29 05:39:50,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 630 transitions. [2023-11-29 05:39:50,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:39:50,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 630 transitions. [2023-11-29 05:39:50,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 18.529411764705884) internal successors, (630), 34 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:50,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 49.0) internal successors, (1715), 35 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:50,956 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 49.0) internal successors, (1715), 35 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:50,956 INFO L175 Difference]: Start difference. First operand has 194 places, 149 transitions, 1463 flow. Second operand 34 states and 630 transitions. [2023-11-29 05:39:50,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 1165 transitions, 14430 flow [2023-11-29 05:39:51,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 1165 transitions, 14293 flow, removed 8 selfloop flow, removed 31 redundant places. [2023-11-29 05:39:51,284 INFO L231 Difference]: Finished difference. Result has 196 places, 148 transitions, 1407 flow [2023-11-29 05:39:51,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1407, PETRI_PLACES=196, PETRI_TRANSITIONS=148} [2023-11-29 05:39:51,284 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 147 predicate places. [2023-11-29 05:39:51,284 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 148 transitions, 1407 flow [2023-11-29 05:39:51,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 13.34920634920635) internal successors, (841), 63 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:51,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:39:51,285 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:39:51,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-29 05:39:51,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:51,485 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:39:51,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:39:51,485 INFO L85 PathProgramCache]: Analyzing trace with hash -456157436, now seen corresponding path program 10 times [2023-11-29 05:39:51,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:39:51,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224229931] [2023-11-29 05:39:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:39:51,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:39:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:39:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:52,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:39:52,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224229931] [2023-11-29 05:39:52,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224229931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:39:52,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637537374] [2023-11-29 05:39:52,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:39:52,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:39:52,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:39:52,186 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:39:52,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 05:39:52,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:39:52,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:39:52,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 05:39:52,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:39:52,628 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 19 treesize of output 1 [2023-11-29 05:39:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:53,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:39:53,643 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 05:39:53,645 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 24 treesize of output 20 [2023-11-29 05:39:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:39:53,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637537374] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:39:53,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:39:53,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 61 [2023-11-29 05:39:53,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872063801] [2023-11-29 05:39:53,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:39:53,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-29 05:39:53,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:39:53,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-29 05:39:53,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3714, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 05:39:54,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:39:54,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 148 transitions, 1407 flow. Second operand has 63 states, 63 states have (on average 13.444444444444445) internal successors, (847), 63 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:54,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:39:54,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:39:54,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:01,230 INFO L124 PetriNetUnfolderBase]: 9344/18609 cut-off events. [2023-11-29 05:40:01,230 INFO L125 PetriNetUnfolderBase]: For 130761/132664 co-relation queries the response was YES. [2023-11-29 05:40:01,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93233 conditions, 18609 events. 9344/18609 cut-off events. For 130761/132664 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 147264 event pairs, 886 based on Foata normal form. 401/18824 useless extension candidates. Maximal degree in co-relation 93206. Up to 3170 conditions per place. [2023-11-29 05:40:01,413 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 642 selfloop transitions, 77 changer transitions 0/744 dead transitions. [2023-11-29 05:40:01,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 744 transitions, 10115 flow [2023-11-29 05:40:01,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 05:40:01,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-29 05:40:01,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 631 transitions. [2023-11-29 05:40:01,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787515006002401 [2023-11-29 05:40:01,415 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 631 transitions. [2023-11-29 05:40:01,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 631 transitions. [2023-11-29 05:40:01,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:01,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 631 transitions. [2023-11-29 05:40:01,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 18.558823529411764) internal successors, (631), 34 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:01,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 49.0) internal successors, (1715), 35 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:01,417 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 49.0) internal successors, (1715), 35 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:01,417 INFO L175 Difference]: Start difference. First operand has 196 places, 148 transitions, 1407 flow. Second operand 34 states and 631 transitions. [2023-11-29 05:40:01,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 744 transitions, 10115 flow [2023-11-29 05:40:01,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 744 transitions, 9300 flow, removed 19 selfloop flow, removed 32 redundant places. [2023-11-29 05:40:01,649 INFO L231 Difference]: Finished difference. Result has 199 places, 153 transitions, 1598 flow [2023-11-29 05:40:01,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1598, PETRI_PLACES=199, PETRI_TRANSITIONS=153} [2023-11-29 05:40:01,650 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 150 predicate places. [2023-11-29 05:40:01,650 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 153 transitions, 1598 flow [2023-11-29 05:40:01,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 13.444444444444445) internal successors, (847), 63 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:01,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:01,650 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:01,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 05:40:01,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:01,850 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:40:01,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:01,851 INFO L85 PathProgramCache]: Analyzing trace with hash -72565984, now seen corresponding path program 5 times [2023-11-29 05:40:01,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:01,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392658796] [2023-11-29 05:40:01,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:01,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:02,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:02,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392658796] [2023-11-29 05:40:02,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392658796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:02,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152539732] [2023-11-29 05:40:02,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:40:02,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:02,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:02,706 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:02,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 05:40:02,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 05:40:02,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:02,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-29 05:40:02,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:02,966 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 05:40:03,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:40:03,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-29 05:40:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:03,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:04,501 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~2#1_206| Int)) (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_#t~nondet17#1_536| Int)) (< (select (store (select |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_206| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) |v_ULTIMATE.start_create_fresh_int_array_#t~nondet17#1_536|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456)) (< |v_ULTIMATE.start_create_fresh_int_array_~i~2#1_206| (+ |c_ULTIMATE.start_create_fresh_int_array_#t~post16#1| 1)))) is different from false [2023-11-29 05:40:04,514 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 23 treesize of output 21 [2023-11-29 05:40:04,517 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 102 treesize of output 94 [2023-11-29 05:40:04,906 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2023-11-29 05:40:04,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152539732] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:04,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:04,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 62 [2023-11-29 05:40:04,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044657227] [2023-11-29 05:40:04,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:04,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-29 05:40:04,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:04,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-29 05:40:04,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3710, Unknown=1, NotChecked=122, Total=4032 [2023-11-29 05:40:04,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 49 [2023-11-29 05:40:04,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 153 transitions, 1598 flow. Second operand has 64 states, 64 states have (on average 11.078125) internal successors, (709), 64 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:04,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:04,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 49 [2023-11-29 05:40:04,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:11,943 INFO L124 PetriNetUnfolderBase]: 12976/22210 cut-off events. [2023-11-29 05:40:11,943 INFO L125 PetriNetUnfolderBase]: For 150091/152527 co-relation queries the response was YES. [2023-11-29 05:40:12,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116432 conditions, 22210 events. 12976/22210 cut-off events. For 150091/152527 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 159440 event pairs, 1146 based on Foata normal form. 92/21899 useless extension candidates. Maximal degree in co-relation 116404. Up to 3404 conditions per place. [2023-11-29 05:40:12,171 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 660 selfloop transitions, 81 changer transitions 0/760 dead transitions. [2023-11-29 05:40:12,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 760 transitions, 9585 flow [2023-11-29 05:40:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 05:40:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-29 05:40:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 558 transitions. [2023-11-29 05:40:12,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3253644314868805 [2023-11-29 05:40:12,172 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 558 transitions. [2023-11-29 05:40:12,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 558 transitions. [2023-11-29 05:40:12,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:12,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 558 transitions. [2023-11-29 05:40:12,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 15.942857142857143) internal successors, (558), 35 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:12,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 49.0) internal successors, (1764), 36 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:12,175 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 49.0) internal successors, (1764), 36 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:12,175 INFO L175 Difference]: Start difference. First operand has 199 places, 153 transitions, 1598 flow. Second operand 35 states and 558 transitions. [2023-11-29 05:40:12,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 760 transitions, 9585 flow [2023-11-29 05:40:12,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 760 transitions, 9394 flow, removed 10 selfloop flow, removed 30 redundant places. [2023-11-29 05:40:12,453 INFO L231 Difference]: Finished difference. Result has 203 places, 152 transitions, 1551 flow [2023-11-29 05:40:12,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1551, PETRI_PLACES=203, PETRI_TRANSITIONS=152} [2023-11-29 05:40:12,454 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 154 predicate places. [2023-11-29 05:40:12,454 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 152 transitions, 1551 flow [2023-11-29 05:40:12,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 11.078125) internal successors, (709), 64 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:12,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:12,454 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2023-11-29 05:40:12,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-29 05:40:12,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-29 05:40:12,654 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:40:12,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:12,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1571766296, now seen corresponding path program 9 times [2023-11-29 05:40:12,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:12,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640722626] [2023-11-29 05:40:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:12,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 71 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:13,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:13,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640722626] [2023-11-29 05:40:13,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640722626] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:13,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637714815] [2023-11-29 05:40:13,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:40:13,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:13,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:13,117 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:13,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 05:40:13,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-29 05:40:13,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:13,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:40:13,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:13,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:14,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637714815] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:14,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:14,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 69 [2023-11-29 05:40:14,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766780932] [2023-11-29 05:40:14,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:14,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-29 05:40:14,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:14,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-29 05:40:14,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=4079, Unknown=0, NotChecked=0, Total=4830 [2023-11-29 05:40:14,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:40:14,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 152 transitions, 1551 flow. Second operand has 70 states, 70 states have (on average 12.442857142857143) internal successors, (871), 70 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:14,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:14,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:40:14,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:18,645 INFO L124 PetriNetUnfolderBase]: 9884/18382 cut-off events. [2023-11-29 05:40:18,645 INFO L125 PetriNetUnfolderBase]: For 138182/140239 co-relation queries the response was YES. [2023-11-29 05:40:18,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94042 conditions, 18382 events. 9884/18382 cut-off events. For 138182/140239 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 138623 event pairs, 3994 based on Foata normal form. 161/18152 useless extension candidates. Maximal degree in co-relation 94015. Up to 8095 conditions per place. [2023-11-29 05:40:18,813 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 382 selfloop transitions, 43 changer transitions 162/616 dead transitions. [2023-11-29 05:40:18,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 616 transitions, 8079 flow [2023-11-29 05:40:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 05:40:18,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 05:40:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 517 transitions. [2023-11-29 05:40:18,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3517006802721088 [2023-11-29 05:40:18,815 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 517 transitions. [2023-11-29 05:40:18,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 517 transitions. [2023-11-29 05:40:18,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:18,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 517 transitions. [2023-11-29 05:40:18,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 17.233333333333334) internal successors, (517), 30 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:18,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 49.0) internal successors, (1519), 31 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:18,818 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 49.0) internal successors, (1519), 31 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:18,818 INFO L175 Difference]: Start difference. First operand has 203 places, 152 transitions, 1551 flow. Second operand 30 states and 517 transitions. [2023-11-29 05:40:18,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 616 transitions, 8079 flow [2023-11-29 05:40:19,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 616 transitions, 7394 flow, removed 15 selfloop flow, removed 34 redundant places. [2023-11-29 05:40:19,306 INFO L231 Difference]: Finished difference. Result has 212 places, 172 transitions, 1810 flow [2023-11-29 05:40:19,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1810, PETRI_PLACES=212, PETRI_TRANSITIONS=172} [2023-11-29 05:40:19,307 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 163 predicate places. [2023-11-29 05:40:19,307 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 172 transitions, 1810 flow [2023-11-29 05:40:19,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 12.442857142857143) internal successors, (871), 70 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:19,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:19,307 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:40:19,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-29 05:40:19,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-29 05:40:19,507 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:40:19,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:19,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2000164817, now seen corresponding path program 11 times [2023-11-29 05:40:19,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:19,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301999294] [2023-11-29 05:40:19,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:19,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 71 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:19,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:19,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301999294] [2023-11-29 05:40:19,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301999294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:19,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846472079] [2023-11-29 05:40:19,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:40:19,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:19,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:19,963 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:19,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 05:40:20,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-29 05:40:20,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:20,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 05:40:20,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:20,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 102 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:21,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846472079] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:21,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:21,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 69 [2023-11-29 05:40:21,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848137331] [2023-11-29 05:40:21,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:21,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-29 05:40:21,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:21,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-29 05:40:21,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=4079, Unknown=0, NotChecked=0, Total=4830 [2023-11-29 05:40:21,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:40:21,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 172 transitions, 1810 flow. Second operand has 70 states, 70 states have (on average 12.471428571428572) internal successors, (873), 70 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:21,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:21,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:40:21,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:25,719 INFO L124 PetriNetUnfolderBase]: 9097/16939 cut-off events. [2023-11-29 05:40:25,719 INFO L125 PetriNetUnfolderBase]: For 128862/131425 co-relation queries the response was YES. [2023-11-29 05:40:25,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87688 conditions, 16939 events. 9097/16939 cut-off events. For 128862/131425 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 126789 event pairs, 3894 based on Foata normal form. 556/17243 useless extension candidates. Maximal degree in co-relation 87649. Up to 8273 conditions per place. [2023-11-29 05:40:25,854 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 78 selfloop transitions, 16 changer transitions 443/558 dead transitions. [2023-11-29 05:40:25,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 558 transitions, 7952 flow [2023-11-29 05:40:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 05:40:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-29 05:40:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 502 transitions. [2023-11-29 05:40:25,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3414965986394558 [2023-11-29 05:40:25,856 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 502 transitions. [2023-11-29 05:40:25,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 502 transitions. [2023-11-29 05:40:25,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:25,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 502 transitions. [2023-11-29 05:40:25,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 16.733333333333334) internal successors, (502), 30 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:25,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 49.0) internal successors, (1519), 31 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:25,858 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 49.0) internal successors, (1519), 31 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:25,858 INFO L175 Difference]: Start difference. First operand has 212 places, 172 transitions, 1810 flow. Second operand 30 states and 502 transitions. [2023-11-29 05:40:25,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 558 transitions, 7952 flow [2023-11-29 05:40:26,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 558 transitions, 7645 flow, removed 137 selfloop flow, removed 15 redundant places. [2023-11-29 05:40:26,206 INFO L231 Difference]: Finished difference. Result has 226 places, 115 transitions, 1095 flow [2023-11-29 05:40:26,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1095, PETRI_PLACES=226, PETRI_TRANSITIONS=115} [2023-11-29 05:40:26,207 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 177 predicate places. [2023-11-29 05:40:26,207 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 115 transitions, 1095 flow [2023-11-29 05:40:26,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 12.471428571428572) internal successors, (873), 70 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:26,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:26,207 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2023-11-29 05:40:26,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 05:40:26,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-11-29 05:40:26,408 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:40:26,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:26,408 INFO L85 PathProgramCache]: Analyzing trace with hash -7041659, now seen corresponding path program 10 times [2023-11-29 05:40:26,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:26,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244475115] [2023-11-29 05:40:26,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:26,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:26,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:27,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:27,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244475115] [2023-11-29 05:40:27,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244475115] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:27,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995864909] [2023-11-29 05:40:27,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:40:27,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:27,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:27,383 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:27,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 05:40:27,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:40:27,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:27,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 05:40:27,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:27,997 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 19 treesize of output 1 [2023-11-29 05:40:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:28,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:29,539 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 16 treesize of output 14 [2023-11-29 05:40:29,542 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 20 treesize of output 16 [2023-11-29 05:40:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:29,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995864909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:29,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:29,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 71 [2023-11-29 05:40:29,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511809527] [2023-11-29 05:40:29,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:29,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-29 05:40:29,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:29,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-29 05:40:29,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=5034, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 05:40:30,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:40:30,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 115 transitions, 1095 flow. Second operand has 73 states, 73 states have (on average 13.342465753424657) internal successors, (974), 73 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:30,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:30,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:40:30,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:40:37,396 INFO L124 PetriNetUnfolderBase]: 5336/10668 cut-off events. [2023-11-29 05:40:37,396 INFO L125 PetriNetUnfolderBase]: For 76168/77235 co-relation queries the response was YES. [2023-11-29 05:40:37,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54063 conditions, 10668 events. 5336/10668 cut-off events. For 76168/77235 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 75406 event pairs, 539 based on Foata normal form. 84/10618 useless extension candidates. Maximal degree in co-relation 54026. Up to 1955 conditions per place. [2023-11-29 05:40:37,504 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 734 selfloop transitions, 53 changer transitions 0/810 dead transitions. [2023-11-29 05:40:37,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 810 transitions, 10321 flow [2023-11-29 05:40:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 05:40:37,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-29 05:40:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 724 transitions. [2023-11-29 05:40:37,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37885923600209315 [2023-11-29 05:40:37,506 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 724 transitions. [2023-11-29 05:40:37,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 724 transitions. [2023-11-29 05:40:37,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:40:37,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 724 transitions. [2023-11-29 05:40:37,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 18.564102564102566) internal successors, (724), 39 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:37,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 49.0) internal successors, (1960), 40 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:37,509 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 49.0) internal successors, (1960), 40 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:37,509 INFO L175 Difference]: Start difference. First operand has 226 places, 115 transitions, 1095 flow. Second operand 39 states and 724 transitions. [2023-11-29 05:40:37,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 810 transitions, 10321 flow [2023-11-29 05:40:37,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 810 transitions, 8930 flow, removed 34 selfloop flow, removed 35 redundant places. [2023-11-29 05:40:37,755 INFO L231 Difference]: Finished difference. Result has 186 places, 121 transitions, 1159 flow [2023-11-29 05:40:37,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1159, PETRI_PLACES=186, PETRI_TRANSITIONS=121} [2023-11-29 05:40:37,756 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 137 predicate places. [2023-11-29 05:40:37,756 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 121 transitions, 1159 flow [2023-11-29 05:40:37,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 13.342465753424657) internal successors, (974), 73 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:37,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:40:37,756 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2023-11-29 05:40:37,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 05:40:37,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:37,957 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:40:37,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:40:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash -7041660, now seen corresponding path program 8 times [2023-11-29 05:40:37,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:40:37,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191390618] [2023-11-29 05:40:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:40:37,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:40:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:40:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:38,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:40:38,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191390618] [2023-11-29 05:40:38,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191390618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:40:38,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385711510] [2023-11-29 05:40:38,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:40:38,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:40:38,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:40:38,876 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:40:38,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 05:40:39,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:40:39,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:40:39,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 05:40:39,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:40:39,526 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 05:40:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 96 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:41,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:40:42,886 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 05:40:42,889 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 05:40:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:40:44,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385711510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:40:44,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:40:44,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 30] total 88 [2023-11-29 05:40:44,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607328503] [2023-11-29 05:40:44,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:40:44,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-11-29 05:40:44,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:40:44,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-11-29 05:40:44,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=7536, Unknown=0, NotChecked=0, Total=8010 [2023-11-29 05:40:46,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:40:46,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 121 transitions, 1159 flow. Second operand has 90 states, 90 states have (on average 12.466666666666667) internal successors, (1122), 90 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:40:46,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:40:46,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:40:46,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:06,717 INFO L124 PetriNetUnfolderBase]: 18340/33888 cut-off events. [2023-11-29 05:41:06,717 INFO L125 PetriNetUnfolderBase]: For 197596/201048 co-relation queries the response was YES. [2023-11-29 05:41:06,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164806 conditions, 33888 events. 18340/33888 cut-off events. For 197596/201048 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 277033 event pairs, 1349 based on Foata normal form. 420/34034 useless extension candidates. Maximal degree in co-relation 164782. Up to 4602 conditions per place. [2023-11-29 05:41:07,034 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 2284 selfloop transitions, 140 changer transitions 19/2464 dead transitions. [2023-11-29 05:41:07,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 2464 transitions, 27790 flow [2023-11-29 05:41:07,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-11-29 05:41:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2023-11-29 05:41:07,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 1762 transitions. [2023-11-29 05:41:07,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4040357716120156 [2023-11-29 05:41:07,036 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 1762 transitions. [2023-11-29 05:41:07,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 1762 transitions. [2023-11-29 05:41:07,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:41:07,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 1762 transitions. [2023-11-29 05:41:07,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 19.797752808988765) internal successors, (1762), 89 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:07,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 49.0) internal successors, (4410), 90 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:07,042 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 49.0) internal successors, (4410), 90 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:07,042 INFO L175 Difference]: Start difference. First operand has 186 places, 121 transitions, 1159 flow. Second operand 89 states and 1762 transitions. [2023-11-29 05:41:07,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 2464 transitions, 27790 flow [2023-11-29 05:41:07,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 2464 transitions, 27368 flow, removed 31 selfloop flow, removed 37 redundant places. [2023-11-29 05:41:07,895 INFO L231 Difference]: Finished difference. Result has 243 places, 209 transitions, 2241 flow [2023-11-29 05:41:07,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=2241, PETRI_PLACES=243, PETRI_TRANSITIONS=209} [2023-11-29 05:41:07,896 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 194 predicate places. [2023-11-29 05:41:07,896 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 209 transitions, 2241 flow [2023-11-29 05:41:07,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 12.466666666666667) internal successors, (1122), 90 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:07,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:07,896 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:07,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-29 05:41:08,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:08,096 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:41:08,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:08,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1538342261, now seen corresponding path program 6 times [2023-11-29 05:41:08,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:08,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613932224] [2023-11-29 05:41:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:08,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:08,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613932224] [2023-11-29 05:41:08,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613932224] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:08,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357074098] [2023-11-29 05:41:08,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:41:08,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:08,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:08,971 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:08,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-29 05:41:09,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 05:41:09,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:09,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 05:41:09,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:09,898 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 05:41:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 96 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:11,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:41:12,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-29 05:41:12,951 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 05:41:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:14,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357074098] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:41:14,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:41:14,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 30] total 88 [2023-11-29 05:41:14,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681774077] [2023-11-29 05:41:14,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:41:14,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-11-29 05:41:14,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:14,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-11-29 05:41:14,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=7536, Unknown=0, NotChecked=0, Total=8010 [2023-11-29 05:41:16,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:41:16,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 209 transitions, 2241 flow. Second operand has 90 states, 90 states have (on average 12.533333333333333) internal successors, (1128), 90 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:16,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:16,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:41:16,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:18,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:41:38,269 INFO L124 PetriNetUnfolderBase]: 20490/37389 cut-off events. [2023-11-29 05:41:38,269 INFO L125 PetriNetUnfolderBase]: For 270795/274926 co-relation queries the response was YES. [2023-11-29 05:41:38,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185359 conditions, 37389 events. 20490/37389 cut-off events. For 270795/274926 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 304243 event pairs, 992 based on Foata normal form. 634/37825 useless extension candidates. Maximal degree in co-relation 185330. Up to 4985 conditions per place. [2023-11-29 05:41:38,737 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 2536 selfloop transitions, 139 changer transitions 40/2756 dead transitions. [2023-11-29 05:41:38,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 2756 transitions, 40023 flow [2023-11-29 05:41:38,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-11-29 05:41:38,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2023-11-29 05:41:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 1715 transitions. [2023-11-29 05:41:38,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39325842696629215 [2023-11-29 05:41:38,739 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 1715 transitions. [2023-11-29 05:41:38,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 1715 transitions. [2023-11-29 05:41:38,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:41:38,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 1715 transitions. [2023-11-29 05:41:38,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 19.269662921348313) internal successors, (1715), 89 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:38,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 49.0) internal successors, (4410), 90 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:38,746 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 49.0) internal successors, (4410), 90 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:38,746 INFO L175 Difference]: Start difference. First operand has 243 places, 209 transitions, 2241 flow. Second operand 89 states and 1715 transitions. [2023-11-29 05:41:38,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 2756 transitions, 40023 flow [2023-11-29 05:41:39,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 2756 transitions, 34706 flow, removed 906 selfloop flow, removed 36 redundant places. [2023-11-29 05:41:39,544 INFO L231 Difference]: Finished difference. Result has 303 places, 296 transitions, 3068 flow [2023-11-29 05:41:39,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1930, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=3068, PETRI_PLACES=303, PETRI_TRANSITIONS=296} [2023-11-29 05:41:39,544 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 254 predicate places. [2023-11-29 05:41:39,544 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 296 transitions, 3068 flow [2023-11-29 05:41:39,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 12.533333333333333) internal successors, (1128), 90 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:39,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:39,544 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:39,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-29 05:41:39,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-11-29 05:41:39,745 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:41:39,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1538342260, now seen corresponding path program 12 times [2023-11-29 05:41:39,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:39,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290252875] [2023-11-29 05:41:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:39,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:40,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:40,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290252875] [2023-11-29 05:41:40,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290252875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:40,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168269115] [2023-11-29 05:41:40,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:41:40,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:40,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:40,571 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:40,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-29 05:41:41,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 05:41:41,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:41:41,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 05:41:41,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:41,825 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 05:41:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 96 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:43,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:41:45,057 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 05:41:45,060 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 05:41:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:46,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168269115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:41:46,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:41:46,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 30] total 88 [2023-11-29 05:41:46,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395825860] [2023-11-29 05:41:46,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:41:46,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-11-29 05:41:46,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-11-29 05:41:46,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=7536, Unknown=0, NotChecked=0, Total=8010 [2023-11-29 05:41:48,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:41:48,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 296 transitions, 3068 flow. Second operand has 90 states, 90 states have (on average 12.533333333333333) internal successors, (1128), 90 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:48,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:48,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:41:48,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:41:49,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:42:10,185 INFO L124 PetriNetUnfolderBase]: 19984/36679 cut-off events. [2023-11-29 05:42:10,185 INFO L125 PetriNetUnfolderBase]: For 243547/247495 co-relation queries the response was YES. [2023-11-29 05:42:10,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183458 conditions, 36679 events. 19984/36679 cut-off events. For 243547/247495 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 299189 event pairs, 992 based on Foata normal form. 626/37107 useless extension candidates. Maximal degree in co-relation 183424. Up to 4893 conditions per place. [2023-11-29 05:42:10,571 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 1804 selfloop transitions, 138 changer transitions 769/2752 dead transitions. [2023-11-29 05:42:10,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 2752 transitions, 35033 flow [2023-11-29 05:42:10,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-11-29 05:42:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2023-11-29 05:42:10,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 1711 transitions. [2023-11-29 05:42:10,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923412061453795 [2023-11-29 05:42:10,573 INFO L72 ComplementDD]: Start complementDD. Operand 89 states and 1711 transitions. [2023-11-29 05:42:10,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 1711 transitions. [2023-11-29 05:42:10,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:42:10,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 89 states and 1711 transitions. [2023-11-29 05:42:10,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 90 states, 89 states have (on average 19.224719101123597) internal successors, (1711), 89 states have internal predecessors, (1711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:10,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 90 states, 90 states have (on average 49.0) internal successors, (4410), 90 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:10,578 INFO L81 ComplementDD]: Finished complementDD. Result has 90 states, 90 states have (on average 49.0) internal successors, (4410), 90 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:10,578 INFO L175 Difference]: Start difference. First operand has 303 places, 296 transitions, 3068 flow. Second operand 89 states and 1711 transitions. [2023-11-29 05:42:10,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 2752 transitions, 35033 flow [2023-11-29 05:42:11,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 2752 transitions, 34677 flow, removed 37 selfloop flow, removed 37 redundant places. [2023-11-29 05:42:11,409 INFO L231 Difference]: Finished difference. Result has 354 places, 276 transitions, 2711 flow [2023-11-29 05:42:11,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2696, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=89, PETRI_FLOW=2711, PETRI_PLACES=354, PETRI_TRANSITIONS=276} [2023-11-29 05:42:11,410 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 305 predicate places. [2023-11-29 05:42:11,410 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 276 transitions, 2711 flow [2023-11-29 05:42:11,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 12.533333333333333) internal successors, (1128), 90 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:11,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:42:11,411 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2023-11-29 05:42:11,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-29 05:42:11,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-29 05:42:11,611 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:42:11,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:11,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1229566960, now seen corresponding path program 11 times [2023-11-29 05:42:11,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:11,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552501229] [2023-11-29 05:42:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:11,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 103 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:12,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:42:12,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552501229] [2023-11-29 05:42:12,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552501229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:12,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194279332] [2023-11-29 05:42:12,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:42:12,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:12,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:42:12,219 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:42:12,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-29 05:42:12,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 05:42:12,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:42:12,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 05:42:12,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 140 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:13,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:42:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 140 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:13,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194279332] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:42:13,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:42:13,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 79 [2023-11-29 05:42:13,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072127052] [2023-11-29 05:42:13,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:42:13,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-11-29 05:42:13,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:13,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-11-29 05:42:13,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=5358, Unknown=0, NotChecked=0, Total=6320 [2023-11-29 05:42:14,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:42:14,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 276 transitions, 2711 flow. Second operand has 80 states, 80 states have (on average 12.4375) internal successors, (995), 80 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:14,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:42:14,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:42:14,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:42:21,549 INFO L124 PetriNetUnfolderBase]: 17064/32131 cut-off events. [2023-11-29 05:42:21,549 INFO L125 PetriNetUnfolderBase]: For 192724/196182 co-relation queries the response was YES. [2023-11-29 05:42:21,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155055 conditions, 32131 events. 17064/32131 cut-off events. For 192724/196182 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 264834 event pairs, 8758 based on Foata normal form. 80/31488 useless extension candidates. Maximal degree in co-relation 155022. Up to 18623 conditions per place. [2023-11-29 05:42:21,849 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 153 selfloop transitions, 19 changer transitions 571/775 dead transitions. [2023-11-29 05:42:21,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 775 transitions, 9175 flow [2023-11-29 05:42:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 05:42:21,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-29 05:42:21,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 566 transitions. [2023-11-29 05:42:21,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3397358943577431 [2023-11-29 05:42:21,850 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 566 transitions. [2023-11-29 05:42:21,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 566 transitions. [2023-11-29 05:42:21,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:42:21,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 566 transitions. [2023-11-29 05:42:21,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 16.647058823529413) internal successors, (566), 34 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:21,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 49.0) internal successors, (1715), 35 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:21,852 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 49.0) internal successors, (1715), 35 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:21,852 INFO L175 Difference]: Start difference. First operand has 354 places, 276 transitions, 2711 flow. Second operand 34 states and 566 transitions. [2023-11-29 05:42:21,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 775 transitions, 9175 flow [2023-11-29 05:42:22,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 775 transitions, 8051 flow, removed 4 selfloop flow, removed 91 redundant places. [2023-11-29 05:42:22,708 INFO L231 Difference]: Finished difference. Result has 296 places, 204 transitions, 1832 flow [2023-11-29 05:42:22,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1832, PETRI_PLACES=296, PETRI_TRANSITIONS=204} [2023-11-29 05:42:22,708 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 247 predicate places. [2023-11-29 05:42:22,709 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 204 transitions, 1832 flow [2023-11-29 05:42:22,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 12.4375) internal successors, (995), 80 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:22,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:42:22,709 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2023-11-29 05:42:22,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-29 05:42:22,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-29 05:42:22,910 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:42:22,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:42:22,910 INFO L85 PathProgramCache]: Analyzing trace with hash -939071757, now seen corresponding path program 12 times [2023-11-29 05:42:22,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:42:22,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367383220] [2023-11-29 05:42:22,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:42:22,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:42:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:42:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:24,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:42:24,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367383220] [2023-11-29 05:42:24,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367383220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:42:24,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150567468] [2023-11-29 05:42:24,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:42:24,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:42:24,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:42:24,310 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:42:24,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-29 05:42:25,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 05:42:25,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:42:25,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 05:42:25,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:42:25,907 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 05:42:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 133 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:27,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:42:29,673 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 05:42:29,677 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 05:42:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 126 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:42:31,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150567468] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:42:31,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:42:31,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 34, 34] total 100 [2023-11-29 05:42:31,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345877632] [2023-11-29 05:42:31,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:42:31,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-11-29 05:42:31,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:42:31,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-11-29 05:42:31,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=588, Invalid=9714, Unknown=0, NotChecked=0, Total=10302 [2023-11-29 05:42:33,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:42:33,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 204 transitions, 1832 flow. Second operand has 102 states, 102 states have (on average 12.470588235294118) internal successors, (1272), 102 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:33,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:42:33,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:42:33,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:42:58,822 INFO L124 PetriNetUnfolderBase]: 21329/39228 cut-off events. [2023-11-29 05:42:58,822 INFO L125 PetriNetUnfolderBase]: For 214124/218332 co-relation queries the response was YES. [2023-11-29 05:42:59,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187039 conditions, 39228 events. 21329/39228 cut-off events. For 214124/218332 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 321683 event pairs, 1178 based on Foata normal form. 368/39320 useless extension candidates. Maximal degree in co-relation 187011. Up to 5341 conditions per place. [2023-11-29 05:42:59,161 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 1928 selfloop transitions, 111 changer transitions 941/3003 dead transitions. [2023-11-29 05:42:59,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 3003 transitions, 35004 flow [2023-11-29 05:42:59,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-29 05:42:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2023-11-29 05:42:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 1928 transitions. [2023-11-29 05:42:59,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39346938775510204 [2023-11-29 05:42:59,164 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 1928 transitions. [2023-11-29 05:42:59,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 1928 transitions. [2023-11-29 05:42:59,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:42:59,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 1928 transitions. [2023-11-29 05:42:59,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 19.28) internal successors, (1928), 100 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:59,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 49.0) internal successors, (4949), 101 states have internal predecessors, (4949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:59,169 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 49.0) internal successors, (4949), 101 states have internal predecessors, (4949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:59,169 INFO L175 Difference]: Start difference. First operand has 296 places, 204 transitions, 1832 flow. Second operand 100 states and 1928 transitions. [2023-11-29 05:42:59,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 3003 transitions, 35004 flow [2023-11-29 05:42:59,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 3003 transitions, 34935 flow, removed 16 selfloop flow, removed 20 redundant places. [2023-11-29 05:42:59,969 INFO L231 Difference]: Finished difference. Result has 319 places, 184 transitions, 2014 flow [2023-11-29 05:42:59,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1777, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=2014, PETRI_PLACES=319, PETRI_TRANSITIONS=184} [2023-11-29 05:42:59,969 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 270 predicate places. [2023-11-29 05:42:59,969 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 184 transitions, 2014 flow [2023-11-29 05:42:59,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 12.470588235294118) internal successors, (1272), 102 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:42:59,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:42:59,970 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2023-11-29 05:42:59,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-29 05:43:00,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-11-29 05:43:00,170 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:43:00,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:00,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1957023473, now seen corresponding path program 9 times [2023-11-29 05:43:00,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:00,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956642766] [2023-11-29 05:43:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:00,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:01,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:01,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956642766] [2023-11-29 05:43:01,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956642766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:01,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246483762] [2023-11-29 05:43:01,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:43:01,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:01,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:01,448 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:01,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-29 05:43:02,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-29 05:43:02,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:43:02,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-29 05:43:02,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:02,668 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 05:43:02,848 INFO L349 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2023-11-29 05:43:02,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2023-11-29 05:43:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 133 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:06,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:09,638 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 27 treesize of output 25 [2023-11-29 05:43:09,643 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 56 treesize of output 50 [2023-11-29 05:43:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 126 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:11,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246483762] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:11,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:11,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36, 36] total 106 [2023-11-29 05:43:11,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44116223] [2023-11-29 05:43:11,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:11,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-11-29 05:43:11,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:11,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-11-29 05:43:11,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=10916, Unknown=0, NotChecked=0, Total=11556 [2023-11-29 05:43:14,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:43:14,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 184 transitions, 2014 flow. Second operand has 108 states, 108 states have (on average 12.444444444444445) internal successors, (1344), 108 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:43:14,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:43:14,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:43:14,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:43:17,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:43:19,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:43:49,383 INFO L124 PetriNetUnfolderBase]: 22993/42261 cut-off events. [2023-11-29 05:43:49,383 INFO L125 PetriNetUnfolderBase]: For 299132/303734 co-relation queries the response was YES. [2023-11-29 05:43:49,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216738 conditions, 42261 events. 22993/42261 cut-off events. For 299132/303734 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 349391 event pairs, 1499 based on Foata normal form. 470/42414 useless extension candidates. Maximal degree in co-relation 216707. Up to 5717 conditions per place. [2023-11-29 05:43:49,805 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 2539 selfloop transitions, 163 changer transitions 370/3095 dead transitions. [2023-11-29 05:43:49,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 3095 transitions, 37848 flow [2023-11-29 05:43:49,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-11-29 05:43:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2023-11-29 05:43:49,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 2029 transitions. [2023-11-29 05:43:49,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3981554160125589 [2023-11-29 05:43:49,809 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 2029 transitions. [2023-11-29 05:43:49,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 2029 transitions. [2023-11-29 05:43:49,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:43:49,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 2029 transitions. [2023-11-29 05:43:49,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 19.509615384615383) internal successors, (2029), 104 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:43:49,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 49.0) internal successors, (5145), 105 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:43:49,814 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 49.0) internal successors, (5145), 105 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:43:49,814 INFO L175 Difference]: Start difference. First operand has 319 places, 184 transitions, 2014 flow. Second operand 104 states and 2029 transitions. [2023-11-29 05:43:49,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 3095 transitions, 37848 flow [2023-11-29 05:43:51,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 3095 transitions, 37204 flow, removed 46 selfloop flow, removed 50 redundant places. [2023-11-29 05:43:51,084 INFO L231 Difference]: Finished difference. Result has 303 places, 236 transitions, 2463 flow [2023-11-29 05:43:51,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=2463, PETRI_PLACES=303, PETRI_TRANSITIONS=236} [2023-11-29 05:43:51,085 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 254 predicate places. [2023-11-29 05:43:51,085 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 236 transitions, 2463 flow [2023-11-29 05:43:51,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 12.444444444444445) internal successors, (1344), 108 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:43:51,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:43:51,085 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:43:51,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-11-29 05:43:51,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-11-29 05:43:51,286 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:43:51,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:43:51,286 INFO L85 PathProgramCache]: Analyzing trace with hash 858784471, now seen corresponding path program 13 times [2023-11-29 05:43:51,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:43:51,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227005949] [2023-11-29 05:43:51,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:43:51,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:43:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:52,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:43:52,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227005949] [2023-11-29 05:43:52,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227005949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:43:52,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602618184] [2023-11-29 05:43:52,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:43:52,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:43:52,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:43:52,575 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:43:52,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-29 05:43:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:43:52,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 84 conjunts are in the unsatisfiable core [2023-11-29 05:43:52,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:43:52,869 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 05:43:52,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 05:43:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:53,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:43:54,623 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 26 treesize of output 24 [2023-11-29 05:43:54,626 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 54 treesize of output 50 [2023-11-29 05:43:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:43:55,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602618184] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:43:55,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:43:55,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 83 [2023-11-29 05:43:55,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353154541] [2023-11-29 05:43:55,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:43:55,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-11-29 05:43:55,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:43:55,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-11-29 05:43:55,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=6869, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 05:43:56,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:43:56,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 236 transitions, 2463 flow. Second operand has 85 states, 85 states have (on average 13.352941176470589) internal successors, (1135), 85 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:43:56,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:43:56,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:43:56,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:44:09,938 INFO L124 PetriNetUnfolderBase]: 22022/43737 cut-off events. [2023-11-29 05:44:09,938 INFO L125 PetriNetUnfolderBase]: For 292380/296170 co-relation queries the response was YES. [2023-11-29 05:44:10,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213927 conditions, 43737 events. 22022/43737 cut-off events. For 292380/296170 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 382601 event pairs, 1692 based on Foata normal form. 530/43988 useless extension candidates. Maximal degree in co-relation 213898. Up to 6552 conditions per place. [2023-11-29 05:44:10,378 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 2773 selfloop transitions, 66 changer transitions 0/2885 dead transitions. [2023-11-29 05:44:10,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 2885 transitions, 41130 flow [2023-11-29 05:44:10,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 05:44:10,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-29 05:44:10,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 858 transitions. [2023-11-29 05:44:10,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3725575336517586 [2023-11-29 05:44:10,380 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 858 transitions. [2023-11-29 05:44:10,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 858 transitions. [2023-11-29 05:44:10,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:44:10,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 858 transitions. [2023-11-29 05:44:10,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 18.25531914893617) internal successors, (858), 47 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:10,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 49.0) internal successors, (2352), 48 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:10,383 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 49.0) internal successors, (2352), 48 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:10,383 INFO L175 Difference]: Start difference. First operand has 303 places, 236 transitions, 2463 flow. Second operand 47 states and 858 transitions. [2023-11-29 05:44:10,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 2885 transitions, 41130 flow [2023-11-29 05:44:10,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 2885 transitions, 36341 flow, removed 475 selfloop flow, removed 67 redundant places. [2023-11-29 05:44:10,957 INFO L231 Difference]: Finished difference. Result has 284 places, 241 transitions, 2384 flow [2023-11-29 05:44:10,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2151, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2384, PETRI_PLACES=284, PETRI_TRANSITIONS=241} [2023-11-29 05:44:10,958 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 235 predicate places. [2023-11-29 05:44:10,958 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 241 transitions, 2384 flow [2023-11-29 05:44:10,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 13.352941176470589) internal successors, (1135), 85 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:10,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:44:10,958 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:10,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-11-29 05:44:11,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-11-29 05:44:11,159 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:44:11,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:11,159 INFO L85 PathProgramCache]: Analyzing trace with hash 858784470, now seen corresponding path program 7 times [2023-11-29 05:44:11,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:11,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476728281] [2023-11-29 05:44:11,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:11,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:12,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:12,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476728281] [2023-11-29 05:44:12,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476728281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:44:12,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969129703] [2023-11-29 05:44:12,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:44:12,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:12,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:44:12,521 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:44:12,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-29 05:44:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:12,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 84 conjunts are in the unsatisfiable core [2023-11-29 05:44:12,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:12,919 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 05:44:13,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 05:44:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:13,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:44:14,609 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 24 treesize of output 22 [2023-11-29 05:44:14,611 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 46 treesize of output 42 [2023-11-29 05:44:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:15,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969129703] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:44:15,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:44:15,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 83 [2023-11-29 05:44:15,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003349151] [2023-11-29 05:44:15,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:44:15,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-11-29 05:44:15,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:15,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-11-29 05:44:15,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=6869, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 05:44:16,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:44:16,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 241 transitions, 2384 flow. Second operand has 85 states, 85 states have (on average 13.352941176470589) internal successors, (1135), 85 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:16,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:44:16,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:44:16,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:44:30,236 INFO L124 PetriNetUnfolderBase]: 21515/42902 cut-off events. [2023-11-29 05:44:30,236 INFO L125 PetriNetUnfolderBase]: For 290289/293977 co-relation queries the response was YES. [2023-11-29 05:44:30,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211656 conditions, 42902 events. 21515/42902 cut-off events. For 290289/293977 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 374793 event pairs, 1692 based on Foata normal form. 522/43145 useless extension candidates. Maximal degree in co-relation 211626. Up to 6552 conditions per place. [2023-11-29 05:44:30,814 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 2772 selfloop transitions, 66 changer transitions 0/2884 dead transitions. [2023-11-29 05:44:30,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 2884 transitions, 36492 flow [2023-11-29 05:44:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 05:44:30,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-29 05:44:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 857 transitions. [2023-11-29 05:44:30,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721233174120712 [2023-11-29 05:44:30,816 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 857 transitions. [2023-11-29 05:44:30,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 857 transitions. [2023-11-29 05:44:30,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:44:30,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 857 transitions. [2023-11-29 05:44:30,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 18.23404255319149) internal successors, (857), 47 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:30,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 49.0) internal successors, (2352), 48 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:30,819 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 49.0) internal successors, (2352), 48 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:30,819 INFO L175 Difference]: Start difference. First operand has 284 places, 241 transitions, 2384 flow. Second operand 47 states and 857 transitions. [2023-11-29 05:44:30,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 2884 transitions, 36492 flow [2023-11-29 05:44:31,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 2884 transitions, 36267 flow, removed 7 selfloop flow, removed 47 redundant places. [2023-11-29 05:44:31,420 INFO L231 Difference]: Finished difference. Result has 283 places, 240 transitions, 2274 flow [2023-11-29 05:44:31,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2274, PETRI_PLACES=283, PETRI_TRANSITIONS=240} [2023-11-29 05:44:31,421 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 234 predicate places. [2023-11-29 05:44:31,421 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 240 transitions, 2274 flow [2023-11-29 05:44:31,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 13.352941176470589) internal successors, (1135), 85 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:31,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:44:31,421 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:31,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-11-29 05:44:31,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:31,622 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:44:31,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:31,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1672407490, now seen corresponding path program 14 times [2023-11-29 05:44:31,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:31,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836147013] [2023-11-29 05:44:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:31,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:33,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:33,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836147013] [2023-11-29 05:44:33,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836147013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:44:33,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410652265] [2023-11-29 05:44:33,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:44:33,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:33,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:44:33,016 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:44:33,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-29 05:44:33,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:44:33,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:44:33,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-29 05:44:33,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:33,825 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 19 treesize of output 1 [2023-11-29 05:44:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:34,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:44:35,909 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 05:44:35,911 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 24 treesize of output 20 [2023-11-29 05:44:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:35,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410652265] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:44:35,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:44:35,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 91 [2023-11-29 05:44:35,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868842350] [2023-11-29 05:44:35,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:44:35,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2023-11-29 05:44:35,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:44:35,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2023-11-29 05:44:35,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=8274, Unknown=0, NotChecked=0, Total=8556 [2023-11-29 05:44:38,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:44:38,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 240 transitions, 2274 flow. Second operand has 93 states, 93 states have (on average 13.397849462365592) internal successors, (1246), 93 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:38,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:44:38,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:44:38,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:44:54,910 INFO L124 PetriNetUnfolderBase]: 24261/48171 cut-off events. [2023-11-29 05:44:54,910 INFO L125 PetriNetUnfolderBase]: For 273868/278060 co-relation queries the response was YES. [2023-11-29 05:44:55,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228019 conditions, 48171 events. 24261/48171 cut-off events. For 273868/278060 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 424252 event pairs, 1734 based on Foata normal form. 554/48494 useless extension candidates. Maximal degree in co-relation 227990. Up to 6934 conditions per place. [2023-11-29 05:44:55,351 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 3107 selfloop transitions, 70 changer transitions 0/3223 dead transitions. [2023-11-29 05:44:55,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 3223 transitions, 40745 flow [2023-11-29 05:44:55,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 05:44:55,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-29 05:44:55,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 910 transitions. [2023-11-29 05:44:55,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37900874635568516 [2023-11-29 05:44:55,353 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 910 transitions. [2023-11-29 05:44:55,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 910 transitions. [2023-11-29 05:44:55,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:44:55,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 910 transitions. [2023-11-29 05:44:55,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 18.571428571428573) internal successors, (910), 49 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:55,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 49.0) internal successors, (2450), 50 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:55,356 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 49.0) internal successors, (2450), 50 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:55,356 INFO L175 Difference]: Start difference. First operand has 283 places, 240 transitions, 2274 flow. Second operand 49 states and 910 transitions. [2023-11-29 05:44:55,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 3223 transitions, 40745 flow [2023-11-29 05:44:55,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 3223 transitions, 40636 flow, removed 0 selfloop flow, removed 44 redundant places. [2023-11-29 05:44:56,009 INFO L231 Difference]: Finished difference. Result has 290 places, 246 transitions, 2423 flow [2023-11-29 05:44:56,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2167, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2423, PETRI_PLACES=290, PETRI_TRANSITIONS=246} [2023-11-29 05:44:56,010 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 241 predicate places. [2023-11-29 05:44:56,010 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 246 transitions, 2423 flow [2023-11-29 05:44:56,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 13.397849462365592) internal successors, (1246), 93 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:44:56,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:44:56,010 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:44:56,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-11-29 05:44:56,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:56,211 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:44:56,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:44:56,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1672407489, now seen corresponding path program 8 times [2023-11-29 05:44:56,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:44:56,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961158467] [2023-11-29 05:44:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:44:56,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:44:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:44:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:57,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:44:57,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961158467] [2023-11-29 05:44:57,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961158467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:44:57,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984140940] [2023-11-29 05:44:57,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:44:57,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:44:57,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:44:57,548 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:44:57,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-29 05:44:57,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:44:57,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:44:57,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-29 05:44:57,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:44:58,363 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 19 treesize of output 1 [2023-11-29 05:44:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:44:59,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:45:00,541 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 16 treesize of output 14 [2023-11-29 05:45:00,543 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 20 treesize of output 16 [2023-11-29 05:45:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:00,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984140940] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:45:00,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:45:00,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 91 [2023-11-29 05:45:00,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492177998] [2023-11-29 05:45:00,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:45:00,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2023-11-29 05:45:00,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:45:00,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2023-11-29 05:45:00,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=8273, Unknown=0, NotChecked=0, Total=8556 [2023-11-29 05:45:02,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:45:02,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 246 transitions, 2423 flow. Second operand has 93 states, 93 states have (on average 13.397849462365592) internal successors, (1246), 93 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:02,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:45:02,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:45:02,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:45:19,263 INFO L124 PetriNetUnfolderBase]: 23754/47336 cut-off events. [2023-11-29 05:45:19,263 INFO L125 PetriNetUnfolderBase]: For 300291/304381 co-relation queries the response was YES. [2023-11-29 05:45:19,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230361 conditions, 47336 events. 23754/47336 cut-off events. For 300291/304381 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 416228 event pairs, 1734 based on Foata normal form. 546/47651 useless extension candidates. Maximal degree in co-relation 230329. Up to 6934 conditions per place. [2023-11-29 05:45:19,746 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 3106 selfloop transitions, 70 changer transitions 0/3222 dead transitions. [2023-11-29 05:45:19,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 3222 transitions, 40802 flow [2023-11-29 05:45:19,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 05:45:19,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-29 05:45:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 909 transitions. [2023-11-29 05:45:19,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37859225322782175 [2023-11-29 05:45:19,748 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 909 transitions. [2023-11-29 05:45:19,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 909 transitions. [2023-11-29 05:45:19,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:45:19,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 909 transitions. [2023-11-29 05:45:19,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 18.551020408163264) internal successors, (909), 49 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:19,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 49.0) internal successors, (2450), 50 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:19,751 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 49.0) internal successors, (2450), 50 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:19,751 INFO L175 Difference]: Start difference. First operand has 290 places, 246 transitions, 2423 flow. Second operand 49 states and 909 transitions. [2023-11-29 05:45:19,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 3222 transitions, 40802 flow [2023-11-29 05:45:20,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 3222 transitions, 40657 flow, removed 8 selfloop flow, removed 43 redundant places. [2023-11-29 05:45:20,577 INFO L231 Difference]: Finished difference. Result has 295 places, 245 transitions, 2400 flow [2023-11-29 05:45:20,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2260, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2400, PETRI_PLACES=295, PETRI_TRANSITIONS=245} [2023-11-29 05:45:20,577 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 246 predicate places. [2023-11-29 05:45:20,577 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 245 transitions, 2400 flow [2023-11-29 05:45:20,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 13.397849462365592) internal successors, (1246), 93 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:20,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:45:20,578 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2023-11-29 05:45:20,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-11-29 05:45:20,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:20,778 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:45:20,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:45:20,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1357051458, now seen corresponding path program 13 times [2023-11-29 05:45:20,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:45:20,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698322400] [2023-11-29 05:45:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:20,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:45:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:22,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:45:22,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698322400] [2023-11-29 05:45:22,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698322400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:45:22,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513033170] [2023-11-29 05:45:22,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:45:22,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:22,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:45:22,301 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:45:22,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-29 05:45:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:22,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 91 conjunts are in the unsatisfiable core [2023-11-29 05:45:22,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:45:22,632 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 05:45:22,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-29 05:45:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:23,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:45:24,699 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 24 treesize of output 22 [2023-11-29 05:45:24,701 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 46 treesize of output 42 [2023-11-29 05:45:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:25,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513033170] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:45:25,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:45:25,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 93 [2023-11-29 05:45:25,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976520399] [2023-11-29 05:45:25,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:45:25,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-11-29 05:45:25,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:45:25,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-11-29 05:45:25,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=8627, Unknown=0, NotChecked=0, Total=8930 [2023-11-29 05:45:27,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:45:27,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 245 transitions, 2400 flow. Second operand has 95 states, 95 states have (on average 13.305263157894737) internal successors, (1264), 95 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:27,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:45:27,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:45:27,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:45:43,415 INFO L124 PetriNetUnfolderBase]: 26246/52296 cut-off events. [2023-11-29 05:45:43,416 INFO L125 PetriNetUnfolderBase]: For 350794/354784 co-relation queries the response was YES. [2023-11-29 05:45:43,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263858 conditions, 52296 events. 26246/52296 cut-off events. For 350794/354784 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 463855 event pairs, 2054 based on Foata normal form. 398/52397 useless extension candidates. Maximal degree in co-relation 263827. Up to 8564 conditions per place. [2023-11-29 05:45:43,931 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 1278 selfloop transitions, 163 changer transitions 0/1470 dead transitions. [2023-11-29 05:45:43,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1470 transitions, 20350 flow [2023-11-29 05:45:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 05:45:43,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-29 05:45:43,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 952 transitions. [2023-11-29 05:45:43,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37362637362637363 [2023-11-29 05:45:43,933 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 952 transitions. [2023-11-29 05:45:43,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 952 transitions. [2023-11-29 05:45:43,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:45:43,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 952 transitions. [2023-11-29 05:45:43,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 18.307692307692307) internal successors, (952), 52 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:43,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 49.0) internal successors, (2597), 53 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:43,936 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 49.0) internal successors, (2597), 53 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:43,936 INFO L175 Difference]: Start difference. First operand has 295 places, 245 transitions, 2400 flow. Second operand 52 states and 952 transitions. [2023-11-29 05:45:43,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1470 transitions, 20350 flow [2023-11-29 05:45:45,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1470 transitions, 18812 flow, removed 0 selfloop flow, removed 46 redundant places. [2023-11-29 05:45:45,576 INFO L231 Difference]: Finished difference. Result has 303 places, 260 transitions, 2904 flow [2023-11-29 05:45:45,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=2904, PETRI_PLACES=303, PETRI_TRANSITIONS=260} [2023-11-29 05:45:45,577 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 254 predicate places. [2023-11-29 05:45:45,577 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 260 transitions, 2904 flow [2023-11-29 05:45:45,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 13.305263157894737) internal successors, (1264), 95 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:45,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:45:45,578 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:45:45,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-11-29 05:45:45,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-11-29 05:45:45,778 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:45:45,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:45:45,778 INFO L85 PathProgramCache]: Analyzing trace with hash 641840236, now seen corresponding path program 9 times [2023-11-29 05:45:45,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:45:45,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309906359] [2023-11-29 05:45:45,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:45,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:45:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 185 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:46,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:45:46,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309906359] [2023-11-29 05:45:46,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309906359] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:45:46,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372388011] [2023-11-29 05:45:46,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:45:46,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:46,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:45:46,762 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:45:46,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-29 05:45:47,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-29 05:45:47,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:45:47,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 05:45:47,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:45:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 234 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:48,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:45:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 234 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:49,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372388011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:45:49,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:45:49,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 99 [2023-11-29 05:45:49,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387840488] [2023-11-29 05:45:49,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:45:49,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-11-29 05:45:49,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:45:49,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-11-29 05:45:49,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1462, Invalid=8438, Unknown=0, NotChecked=0, Total=9900 [2023-11-29 05:45:50,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:45:50,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 260 transitions, 2904 flow. Second operand has 100 states, 100 states have (on average 12.45) internal successors, (1245), 100 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:50,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:45:50,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:45:50,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:46:02,244 INFO L124 PetriNetUnfolderBase]: 30632/55670 cut-off events. [2023-11-29 05:46:02,244 INFO L125 PetriNetUnfolderBase]: For 452707/458824 co-relation queries the response was YES. [2023-11-29 05:46:02,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290212 conditions, 55670 events. 30632/55670 cut-off events. For 452707/458824 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 464550 event pairs, 14829 based on Foata normal form. 768/55671 useless extension candidates. Maximal degree in co-relation 290178. Up to 31559 conditions per place. [2023-11-29 05:46:02,974 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 149 selfloop transitions, 25 changer transitions 934/1142 dead transitions. [2023-11-29 05:46:02,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 1142 transitions, 15213 flow [2023-11-29 05:46:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 05:46:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-29 05:46:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 698 transitions. [2023-11-29 05:46:02,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3391642371234208 [2023-11-29 05:46:02,976 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 698 transitions. [2023-11-29 05:46:02,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 698 transitions. [2023-11-29 05:46:02,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:46:02,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 698 transitions. [2023-11-29 05:46:02,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 16.61904761904762) internal successors, (698), 42 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:02,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 49.0) internal successors, (2107), 43 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:02,978 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 49.0) internal successors, (2107), 43 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:02,979 INFO L175 Difference]: Start difference. First operand has 303 places, 260 transitions, 2904 flow. Second operand 42 states and 698 transitions. [2023-11-29 05:46:02,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 1142 transitions, 15213 flow [2023-11-29 05:46:04,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1142 transitions, 14145 flow, removed 34 selfloop flow, removed 44 redundant places. [2023-11-29 05:46:04,572 INFO L231 Difference]: Finished difference. Result has 320 places, 208 transitions, 2233 flow [2023-11-29 05:46:04,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2657, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=2233, PETRI_PLACES=320, PETRI_TRANSITIONS=208} [2023-11-29 05:46:04,573 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 271 predicate places. [2023-11-29 05:46:04,573 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 208 transitions, 2233 flow [2023-11-29 05:46:04,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 12.45) internal successors, (1245), 100 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:04,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:46:04,573 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2023-11-29 05:46:04,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-11-29 05:46:04,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-11-29 05:46:04,773 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:46:04,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:46:04,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1990109341, now seen corresponding path program 10 times [2023-11-29 05:46:04,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:46:04,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628969555] [2023-11-29 05:46:04,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:46:04,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:46:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:46:06,496 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 7 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:06,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:46:06,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628969555] [2023-11-29 05:46:06,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628969555] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:46:06,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784428157] [2023-11-29 05:46:06,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:46:06,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:46:06,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:46:06,498 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:46:06,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-29 05:46:06,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:46:06,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:46:06,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 104 conjunts are in the unsatisfiable core [2023-11-29 05:46:06,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:46:06,858 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 05:46:06,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 05:46:07,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 05:46:07,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-29 05:46:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:08,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:46:09,915 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 42 treesize of output 40 [2023-11-29 05:46:09,917 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 478 treesize of output 470 [2023-11-29 05:46:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:10,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784428157] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:46:10,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:46:10,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 105 [2023-11-29 05:46:10,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690976867] [2023-11-29 05:46:10,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:46:10,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-11-29 05:46:10,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:46:10,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-11-29 05:46:10,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=10941, Unknown=0, NotChecked=0, Total=11342 [2023-11-29 05:46:12,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:46:12,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 208 transitions, 2233 flow. Second operand has 107 states, 107 states have (on average 13.271028037383177) internal successors, (1420), 107 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:12,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:46:12,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:46:12,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:46:29,113 INFO L124 PetriNetUnfolderBase]: 17602/34914 cut-off events. [2023-11-29 05:46:29,114 INFO L125 PetriNetUnfolderBase]: For 272294/275314 co-relation queries the response was YES. [2023-11-29 05:46:29,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185130 conditions, 34914 events. 17602/34914 cut-off events. For 272294/275314 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 289020 event pairs, 1374 based on Foata normal form. 294/34868 useless extension candidates. Maximal degree in co-relation 185076. Up to 5699 conditions per place. [2023-11-29 05:46:29,661 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 1267 selfloop transitions, 123 changer transitions 0/1417 dead transitions. [2023-11-29 05:46:29,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 1417 transitions, 20005 flow [2023-11-29 05:46:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 05:46:29,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-11-29 05:46:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 1001 transitions. [2023-11-29 05:46:29,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3647959183673469 [2023-11-29 05:46:29,663 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 1001 transitions. [2023-11-29 05:46:29,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 1001 transitions. [2023-11-29 05:46:29,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:46:29,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 1001 transitions. [2023-11-29 05:46:29,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 17.875) internal successors, (1001), 56 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:29,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 49.0) internal successors, (2793), 57 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:29,666 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 49.0) internal successors, (2793), 57 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:29,667 INFO L175 Difference]: Start difference. First operand has 320 places, 208 transitions, 2233 flow. Second operand 56 states and 1001 transitions. [2023-11-29 05:46:29,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 1417 transitions, 20005 flow [2023-11-29 05:46:31,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1417 transitions, 18203 flow, removed 820 selfloop flow, removed 49 redundant places. [2023-11-29 05:46:31,871 INFO L231 Difference]: Finished difference. Result has 277 places, 208 transitions, 2221 flow [2023-11-29 05:46:31,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=2221, PETRI_PLACES=277, PETRI_TRANSITIONS=208} [2023-11-29 05:46:31,872 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 228 predicate places. [2023-11-29 05:46:31,872 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 208 transitions, 2221 flow [2023-11-29 05:46:31,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 13.271028037383177) internal successors, (1420), 107 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:31,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:46:31,872 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1] [2023-11-29 05:46:31,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-11-29 05:46:32,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-11-29 05:46:32,073 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:46:32,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:46:32,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2127061353, now seen corresponding path program 14 times [2023-11-29 05:46:32,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:46:32,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030334238] [2023-11-29 05:46:32,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:46:32,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:46:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:46:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:33,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:46:33,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030334238] [2023-11-29 05:46:33,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030334238] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:46:33,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713369909] [2023-11-29 05:46:33,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:46:33,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:46:33,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:46:33,578 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:46:33,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-29 05:46:33,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:46:33,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:46:33,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 05:46:33,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:46:34,879 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 05:46:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 225 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:37,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:46:40,286 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 05:46:40,290 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 05:46:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 216 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:46:42,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713369909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:46:42,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:46:42,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 42, 42] total 124 [2023-11-29 05:46:42,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101150768] [2023-11-29 05:46:42,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:46:42,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2023-11-29 05:46:42,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:46:42,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2023-11-29 05:46:42,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=850, Invalid=14900, Unknown=0, NotChecked=0, Total=15750 [2023-11-29 05:46:46,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:46:46,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 208 transitions, 2221 flow. Second operand has 126 states, 126 states have (on average 12.476190476190476) internal successors, (1572), 126 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:46:46,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:46:46,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:46:46,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:46:47,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:47:22,699 INFO L124 PetriNetUnfolderBase]: 33488/60922 cut-off events. [2023-11-29 05:47:22,699 INFO L125 PetriNetUnfolderBase]: For 404212/409142 co-relation queries the response was YES. [2023-11-29 05:47:23,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320391 conditions, 60922 events. 33488/60922 cut-off events. For 404212/409142 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 513246 event pairs, 1737 based on Foata normal form. 456/61060 useless extension candidates. Maximal degree in co-relation 320362. Up to 8182 conditions per place. [2023-11-29 05:47:23,312 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 3205 selfloop transitions, 190 changer transitions 1137/4556 dead transitions. [2023-11-29 05:47:23,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 4556 transitions, 59490 flow [2023-11-29 05:47:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-11-29 05:47:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2023-11-29 05:47:23,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 2418 transitions. [2023-11-29 05:47:23,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40448310471729676 [2023-11-29 05:47:23,315 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 2418 transitions. [2023-11-29 05:47:23,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 2418 transitions. [2023-11-29 05:47:23,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:47:23,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 2418 transitions. [2023-11-29 05:47:23,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 19.81967213114754) internal successors, (2418), 122 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:23,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 49.0) internal successors, (6027), 123 states have internal predecessors, (6027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:23,321 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 49.0) internal successors, (6027), 123 states have internal predecessors, (6027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:23,321 INFO L175 Difference]: Start difference. First operand has 277 places, 208 transitions, 2221 flow. Second operand 122 states and 2418 transitions. [2023-11-29 05:47:23,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 4556 transitions, 59490 flow [2023-11-29 05:47:25,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 4556 transitions, 59200 flow, removed 1 selfloop flow, removed 53 redundant places. [2023-11-29 05:47:25,402 INFO L231 Difference]: Finished difference. Result has 351 places, 274 transitions, 3195 flow [2023-11-29 05:47:25,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=3195, PETRI_PLACES=351, PETRI_TRANSITIONS=274} [2023-11-29 05:47:25,402 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 302 predicate places. [2023-11-29 05:47:25,403 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 274 transitions, 3195 flow [2023-11-29 05:47:25,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 12.476190476190476) internal successors, (1572), 126 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:25,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:47:25,403 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:25,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-11-29 05:47:25,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:25,604 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:47:25,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:25,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2093856785, now seen corresponding path program 10 times [2023-11-29 05:47:25,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:25,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474170336] [2023-11-29 05:47:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:25,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:27,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:27,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474170336] [2023-11-29 05:47:27,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474170336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:27,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999412935] [2023-11-29 05:47:27,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:47:27,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:27,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:27,130 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:27,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-29 05:47:27,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:47:27,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:47:27,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 91 conjunts are in the unsatisfiable core [2023-11-29 05:47:27,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:47:28,130 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 19 treesize of output 1 [2023-11-29 05:47:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:29,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:47:30,666 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 16 treesize of output 14 [2023-11-29 05:47:30,668 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 20 treesize of output 16 [2023-11-29 05:47:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:30,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999412935] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:47:30,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:47:30,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 101 [2023-11-29 05:47:30,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38873476] [2023-11-29 05:47:30,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:47:30,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-11-29 05:47:30,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:47:30,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-11-29 05:47:30,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=10193, Unknown=0, NotChecked=0, Total=10506 [2023-11-29 05:47:33,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:47:33,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 274 transitions, 3195 flow. Second operand has 103 states, 103 states have (on average 13.388349514563107) internal successors, (1379), 103 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:33,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:47:33,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:47:33,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:47:55,096 INFO L124 PetriNetUnfolderBase]: 31227/61431 cut-off events. [2023-11-29 05:47:55,096 INFO L125 PetriNetUnfolderBase]: For 549000/554818 co-relation queries the response was YES. [2023-11-29 05:47:55,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329728 conditions, 61431 events. 31227/61431 cut-off events. For 549000/554818 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 548111 event pairs, 2027 based on Foata normal form. 1134/62297 useless extension candidates. Maximal degree in co-relation 329693. Up to 8488 conditions per place. [2023-11-29 05:47:55,814 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 4146 selfloop transitions, 76 changer transitions 0/4274 dead transitions. [2023-11-29 05:47:55,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 4274 transitions, 69247 flow [2023-11-29 05:47:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 05:47:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-11-29 05:47:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 1003 transitions. [2023-11-29 05:47:55,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37906273620559333 [2023-11-29 05:47:55,816 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 1003 transitions. [2023-11-29 05:47:55,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 1003 transitions. [2023-11-29 05:47:55,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:47:55,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 1003 transitions. [2023-11-29 05:47:55,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 18.574074074074073) internal successors, (1003), 54 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:55,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 49.0) internal successors, (2695), 55 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:55,819 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 49.0) internal successors, (2695), 55 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:55,819 INFO L175 Difference]: Start difference. First operand has 351 places, 274 transitions, 3195 flow. Second operand 54 states and 1003 transitions. [2023-11-29 05:47:55,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 4274 transitions, 69247 flow [2023-11-29 05:47:57,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 4274 transitions, 59147 flow, removed 681 selfloop flow, removed 77 redundant places. [2023-11-29 05:47:57,388 INFO L231 Difference]: Finished difference. Result has 330 places, 280 transitions, 3014 flow [2023-11-29 05:47:57,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2734, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=3014, PETRI_PLACES=330, PETRI_TRANSITIONS=280} [2023-11-29 05:47:57,388 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 281 predicate places. [2023-11-29 05:47:57,389 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 280 transitions, 3014 flow [2023-11-29 05:47:57,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 13.388349514563107) internal successors, (1379), 103 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:47:57,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:47:57,389 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:47:57,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-11-29 05:47:57,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:57,590 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:47:57,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:47:57,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2093856784, now seen corresponding path program 15 times [2023-11-29 05:47:57,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:47:57,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976513902] [2023-11-29 05:47:57,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:47:57,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:47:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:47:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:47:59,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:47:59,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976513902] [2023-11-29 05:47:59,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976513902] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:47:59,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242188232] [2023-11-29 05:47:59,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:47:59,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:47:59,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:47:59,300 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:47:59,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-29 05:48:00,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 05:48:00,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:00,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-29 05:48:00,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:00,958 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 05:48:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 225 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:48:03,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:48:06,540 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 05:48:06,544 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 05:48:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 216 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:48:09,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242188232] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:48:09,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:48:09,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 42, 42] total 124 [2023-11-29 05:48:09,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101014438] [2023-11-29 05:48:09,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:48:09,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2023-11-29 05:48:09,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:48:09,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2023-11-29 05:48:09,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=850, Invalid=14900, Unknown=0, NotChecked=0, Total=15750 [2023-11-29 05:48:11,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2023-11-29 05:48:11,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 280 transitions, 3014 flow. Second operand has 126 states, 126 states have (on average 12.523809523809524) internal successors, (1578), 126 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:11,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:48:11,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2023-11-29 05:48:11,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:48:13,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:48:53,192 INFO L124 PetriNetUnfolderBase]: 36720/66250 cut-off events. [2023-11-29 05:48:53,192 INFO L125 PetriNetUnfolderBase]: For 521002/527862 co-relation queries the response was YES. [2023-11-29 05:48:53,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360392 conditions, 66250 events. 36720/66250 cut-off events. For 521002/527862 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 558951 event pairs, 1569 based on Foata normal form. 1666/67654 useless extension candidates. Maximal degree in co-relation 360355. Up to 8865 conditions per place. [2023-11-29 05:48:54,191 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 4511 selfloop transitions, 181 changer transitions 89/4831 dead transitions. [2023-11-29 05:48:54,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 4831 transitions, 64887 flow [2023-11-29 05:48:54,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-11-29 05:48:54,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2023-11-29 05:48:54,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 2287 transitions. [2023-11-29 05:48:54,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825694212111074 [2023-11-29 05:48:54,194 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 2287 transitions. [2023-11-29 05:48:54,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 2287 transitions. [2023-11-29 05:48:54,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:48:54,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 2287 transitions. [2023-11-29 05:48:54,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 18.74590163934426) internal successors, (2287), 122 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:54,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 49.0) internal successors, (6027), 123 states have internal predecessors, (6027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:54,206 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 49.0) internal successors, (6027), 123 states have internal predecessors, (6027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:54,206 INFO L175 Difference]: Start difference. First operand has 330 places, 280 transitions, 3014 flow. Second operand 122 states and 2287 transitions. [2023-11-29 05:48:54,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 4831 transitions, 64887 flow [2023-11-29 05:48:56,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 4831 transitions, 64328 flow, removed 33 selfloop flow, removed 51 redundant places. [2023-11-29 05:48:56,264 INFO L231 Difference]: Finished difference. Result has 406 places, 382 transitions, 4226 flow [2023-11-29 05:48:56,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=4226, PETRI_PLACES=406, PETRI_TRANSITIONS=382} [2023-11-29 05:48:56,265 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 357 predicate places. [2023-11-29 05:48:56,265 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 382 transitions, 4226 flow [2023-11-29 05:48:56,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 12.523809523809524) internal successors, (1578), 126 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:48:56,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:48:56,265 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1] [2023-11-29 05:48:56,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-11-29 05:48:56,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:56,466 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2023-11-29 05:48:56,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:48:56,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1133467720, now seen corresponding path program 11 times [2023-11-29 05:48:56,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:48:56,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612790416] [2023-11-29 05:48:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:48:56,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:48:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:48:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 2 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:48:58,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:48:58,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612790416] [2023-11-29 05:48:58,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612790416] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:48:58,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353342947] [2023-11-29 05:48:58,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:48:58,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:48:58,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:48:58,504 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:48:58,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47bfcd28-d58f-46dc-bd2f-2550a6e7ea9d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-29 05:48:58,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-29 05:48:58,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:48:58,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 102 conjunts are in the unsatisfiable core [2023-11-29 05:48:58,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:48:59,029 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 05:48:59,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:48:59,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 05:48:59,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:48:59,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-29 05:49:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 3 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:49:00,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:14,230 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 25 treesize of output 23 [2023-11-29 05:49:14,233 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 118 treesize of output 110 [2023-11-29 05:49:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:49:15,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353342947] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:49:15,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:49:15,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 43] total 105 [2023-11-29 05:49:15,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315600499] [2023-11-29 05:49:15,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:49:15,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-11-29 05:49:15,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:15,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-11-29 05:49:15,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=10982, Unknown=12, NotChecked=0, Total=11342 [2023-11-29 05:49:18,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2023-11-29 05:49:18,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 382 transitions, 4226 flow. Second operand has 107 states, 107 states have (on average 13.30841121495327) internal successors, (1424), 107 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:49:18,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:49:18,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2023-11-29 05:49:18,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand